PART 5 - AREA 3 (AUTO-CORRECT EXAM)

1. Cooking temperature that destroys most bacteria in foods

a. 115 deg C

b. 100 deg C

c. 74 deg C

d. None of the above

Explanation: Heating food to an internal temperature of 74°C (165°F) is the standard required to instantly destroy most pathogenic bacteria. Source: USDA Food Safety and Inspection Service (FSIS) guidelines.

2. It is the process of removing heat from a substance or space at a lower temperature.

a. Sublimation

b. Heat of fusion

c. Refrigeration

d. All of the above

Explanation: Refrigeration is defined as the transfer of heat from a lower temperature region to a higher temperature one. Source: ASHRAE Handbook - Fundamentals; "Thermodynamics: An Engineering Approach" by Cengel & Boles.

3. Heat moves from a substance naturally to another substance _____________

a. At a higher temperature to lower temperature

b. At lower temperature to higher temperature

c. At either temperature

d. None of the above

Explanation: According to the Second Law of Thermodynamics (Clausius Statement), heat naturally flows from a hotter body to a colder body without external work. Source: "Fundamentals of Physics" by Halliday, Resnick & Walker.

4. It is the intensity of the molecular movement of matter.

a. Energy

b. Heat

c. Work

d. All of the above

Explanation: Thermal energy (heat) is related to the kinetic energy of vibrating and colliding molecules. (Note: "Temperature" is strictly the measure of this intensity, but "Heat" is accepted in this context). Source: "Thermodynamics" by Cengel & Boles.

5. A substance is cold if __________

a. Heat is present

b. Heat is absent

c. Heat is higher

d. All of the above

Explanation: In thermodynamics, "cold" is not an independent quantity; it is merely the human perception of the absence or removal of thermal energy (heat). Source: Fundamentals of Thermodynamics.

6. The quantity of heat in the substance is described in terms of _____________

a. BTU

b. Calories

c. Pascal

d. a and b

Explanation: Heat is measured in British Thermal Units (BTU) in the Imperial system and Calories (or Joules) in the Metric/SI system. Pascal is a unit of pressure. Source: NIST Reference on Constants, Units, and Uncertainty.

7. Ten BTU is equivalent to ______________

a. 2520 calories

b. 2250 calories

c. 2045 calories

d. None of the above

Explanation: 1 BTU is equal to exactly 252.164 calories. Therefore, 10 BTU is approximately 2520 calories. Source: ASHRAE Handbook - Fundamentals Unit Conversions.

8. One hundred calories is equivalent to _________

a. 418.7 Joules

b. 481.7 Joules

c. 471.8 Joules

d. None of the above

Explanation: 1 calorie (thermochemical) equals 4.184 Joules. Therefore, 100 calories = 418.4 Joules (often approximated as 418.7 J for IT calories). Source: International System of Units (SI).

9. An instrument used to measure heat is _____________

a. Thermometer

b. Wattmeter

c. Calorimeter

d. None of the above

Explanation: A calorimeter measures the heat of chemical reactions or physical changes as well as heat capacity. A thermometer only measures temperature (intensity), not quantity. Source: "Chemistry: The Central Science" by Brown, LeMay, Bursten.

10. It is the measurement of the heat level of a substance.

a. Thermometer

b. Temperature

c. Calorimeter

d. All of the above

Explanation: Temperature is the physical quantity that expresses hot and cold, measuring the average kinetic energy of the particles. Source: "Thermodynamics" by Cengel & Boles.

11. Which of the following statements is true?

a. The freezing point of water is 0 F

b. The boiling point of water is 212 C

c. That 32 F and 0 C is the same temperature level

d. None of the above

Explanation: Water freezes at 0°C, which is exactly equivalent to 32°F on the Fahrenheit scale. Source: National Institute of Standards and Technology (NIST) Temperature Scales.

12. It is the quantity of heat required to raise the temperature of a substance one degree scale.

a. Sensible heat

b. Specific heat

c. Latent heat

d. None of the above

Explanation: Specific heat capacity is defined as the amount of heat energy required to raise the temperature of a unit mass of a substance by one degree. Source: Standard Physics Principles.

13. The specific heat of water is _______________

a. 1 BTU/lb-F

b. 1 cal/g-C

c. 1 Kcal/kg-C

d. All of the above

Explanation: All three values reflect the specific heat of liquid water in their respective unit systems. Source: Standard tables of thermal properties of water.

14. It is the amount of heat added or removed from a substance with the change in temperature.

a. Sensible heat

b. Latent heat

c. Specific heat

d. All of the above

Explanation: Sensible heat is the heat exchanged by a thermodynamic system that changes the temperature of the system without changing its phase. Source: ASHRAE Terminology.

15. It is the heat added or removed from a substance causing a change in its state without changing its temperature.

a. Sensible heat

b. Latent heat

c. Specific heat

d. All of the above

Explanation: Latent heat relates to a phase change (like melting or boiling) occurring at constant temperature. Source: "Fundamentals of Physics" by Halliday & Resnick.

16. It is the quantity of heat required to change a unit mass of solid to liquid into its state without changing its temperature.

a. Sensible heat

b. Latent heat

c. Specific heat

d. All of the above

Explanation: Specifically called the "latent heat of fusion", this describes the heat required to change a substance from solid to liquid at its melting point. Source: Principles of Thermodynamics.

17. It is the quantity of heat required to change a unit mass of liquid into a gaseous state without a change in temperature.

a. Latent heat of vaporization

b. Latent heat of fusion

c. Latent heat of sublimation

d. All of the above

Explanation: Vaporization is the transition from liquid to gas.  Source: "Thermodynamics" by Cengel & Boles.

18. It is the quantity of heat required to change a unit mass of gas to liquid state without a change in temperature.

a. Latent heat of vaporization

b. Latent heat of condensation

c. Latent heat of fusion

d. All of the above

Explanation: Condensation is the change of phase from gas to liquid. The heat released during this process is the latent heat of condensation. Source: ASHRAE Fundamentals.

19. It is the quantity of heat required to change a unit mass of solid to gas without a change in temperature.

a. Latent heat of fusion

b. Latent heat of vaporization

c. Latent heat of sublimation

d. None of the above

Explanation: Sublimation is the direct transition from a solid phase to a gas phase without passing through the liquid phase. Source: General Chemistry principles.

20. The latent heat of fusion of water is _____________

a. 336 kJ/kg

b. 144 BTU/lb

c. All of the above

d. None of the above

Explanation: The energy required to melt ice at 0°C is 334-336 kJ/kg in SI units, which is exactly equivalent to 144 BTU/lb in Imperial units. Source: ASHRAE properties of water and ice.

21. At a higher elevation, _________________

a. Water will boil at 100ºC

b. Water will boil above 100ºC

c. Water will boil below 100ºC

d. Water will not boil

Explanation: Boiling occurs when vapor pressure equals atmospheric pressure. At higher elevations, atmospheric pressure drops, meaning water requires less heat to boil. Source: Thermodynamics / Fluid Mechanics.

22. The amount of heat transmitted to a wall is a factor of _____________

a. Wall thickness

b. Temperature difference

c. Resistance of heat flow of the wall materials

d. All of the above

Explanation: According to Fourier's Law of Heat Conduction, heat transfer is directly proportional to temperature difference and inversely proportional to wall thickness and thermal resistance. Source: "Heat and Mass Transfer" by Fundamentals.

23. A material with high emissivity ___________

a. Will collect more heat

b. Will not collect heat

c. Will transmit heat

d. None of the above

Explanation: Emissivity and absorptivity are fundamentally linked (Kirchhoff’s law of thermal radiation). A material with high emissivity is also highly absorptive, thus it will collect (absorb) more radiant heat. Source: Planck's and Kirchhoff's Radiation Laws.

24. The basic uses of insulating materials for a refrigeration system are:

a. To retard heat flow

b. To prevent surface condensation

c. To control noise and vibration

d. All of the above

Explanation: Insulation creates thermal resistance to minimize heat gain, keeps surface temperatures above the dew point to prevent condensation, and dense insulators can dampen acoustic vibration. Source: ASHRAE Refrigeration Handbook.

25. Which of the following insulating materials for a refrigeration system is efficient and least expensive?

a. Asbestos

b. Styrofoam

c. Aluminum foil

d. All of the above

Explanation: Polystyrene (Styrofoam) has low thermal conductivity and is inexpensive to manufacture. Asbestos is hazardous and largely banned; aluminum is radiant insulation. Source: Modern Refrigeration and Air Conditioning.

26. It is the amount or quantity of current flowing in a circuit

a. Voltage

b. Amperage

c. Ohms

d. None of the above

Explanation: Current is the flow of electric charge, formally measured in Amperes (Amperage). Source: Ohm's Law and Basic Electrical Theory.

27. It is the electrical pressure of a circuit

a. Voltage

b. Amperage

c. Ohms

d. None of the above

Explanation: Voltage (electromotive force or potential difference) is the electrical pressure that pushes charge (electrons) through a conducting loop. Source: Basic Electricity text.

28. It is the cooling coil of a refrigeration system

a. Condenser

b. Evaporator

c. Compressor

d. None of the above

Explanation: The evaporator acts as the cooling coil by absorbing heat from the target space as the liquid refrigerant evaporates into a gas. Source: Vapor-Compression Cycle Basics.

29. It is the basic part of a refrigeration system which is characterized by a high pressure side.

a. Condenser

b. Evaporator

c. Expansion valve

d. All of the above

Explanation: The condenser sits on the high-pressure side of the system, receiving high-pressure vapor from the compressor and condensing it to a liquid. Source: "Modern Refrigeration and Air Conditioning".

30. It is a part of a refrigeration system that causes the circulation of a refrigerant.

a. Condenser

b. Expansion valve

c. Compressor

d. None of the above

Explanation: The compressor functions as the "heart" of the system, actively pumping and circulating the refrigerant throughout the cycle. Source: Thermodynamics.

31. It is the part of a refrigeration system that causes the increase (production) of pressure of the refrigerant.

a. Evaporator

b. Compressor

c. Expansion valve

d. All of the above

Explanation: The compressor takes in low-pressure gas and mechanically compresses it, substantially increasing its pressure and temperature. Source: ASHRAE Refrigeration Systems.

32. It is a fluid that easily boils at a lower temperature.

a. Water

b. Oil

c. Refrigerant

d. All of the above

Explanation: Refrigerants (like R-134a or Ammonia) are formulated to boil and condense at specific low temperatures required to move heat effectively. Source: Chemistry of Refrigerants.

33. One ton of refrigeration is the amount of heat required to melt one ton of ice in __________

a. 12 hours

b. 24 minutes

c. one day

d. None of the above

Explanation: A Ton of Refrigeration (TR) is historically defined as the rate of heat transfer needed to melt exactly 2,000 pounds (1 short ton) of pure ice at 0°C (32°F) over exactly 24 hours. Source: Imperial Unit Historical Standards.

34. One ton refrigeration is equal to _____________

a. 288,000 BTU/day

b. 12,000 BTU/hr

c. 200 BTU/min

d. All of the above

Explanation: Melting a ton of ice requires 288,000 BTU over 24 hours. Mathematically, 288,000 / 24 = 12,000 BTU/hr. And 12,000 / 60 = 200 BTU/min. Source: ASHRAE Fundamentals.

35. An example of a refrigerant

a. Ammonia

b. Carbon dioxide

c. Methyl bromide

d. None of the above

Explanation: Ammonia (R-717) is an industrial refrigerant heavily used in food processing and cold storage. (Note: Carbon dioxide is also a refrigerant (R-744), but Ammonia is the classic example in traditional contexts). Source: EPA Refrigerant Listings.

36. Commonly used refrigerant in ice plants.

a. Ammonia

b. Carbon dioxide

c. Methyl chloride

d. None of the above

Explanation: Ammonia is almost universally used in commercial ice plants due to its superior thermodynamic properties, zero ozone depletion, and high energy efficiency. Source: International Institute of Ammonia Refrigeration.

37. A refrigeration appliance that operates at a higher temperature.

a. No frost refrigerator

b. Air conditioner

c. Domestic freezer

d. All of the above

Explanation: Air conditioners typically operate with evaporator temperatures around 4°C to 10°C, whereas freezers and refrigerators operate closer to 0°C or far below. Source: HVAC System Design parameters.

38. The introduction of fresh ambient air to an air-conditioned or refrigerated space.

a. Cooling

b. Air changes

c. Air filtration

d. None of the above

Explanation: The term "Air changes" (or Air Changes Per Hour, ACH) measures how many times the air within a defined space is replaced by fresh or newly conditioned air. Source: ASHRAE Ventilation Standards.

39. It is the removal of accumulated ice from the surfaces of cooling coils which operate below freezing point.

a. Dehumidification

b. Defrosting

c. Ice melting

d. None of the above

Explanation: Defrosting is required to maintain the efficiency of the evaporator coil, as frost buildup acts as an unwanted thermal insulator. Source: Refrigeration operation manuals.

40. A refrigeration system which can be used either to cool or to heat a given space, normally by exchanging the functions of the evaporator and the condenser.

a. Heat pump

b. Humidifier

c. Dehumidifier

d. None of the above

Explanation: A heat pump contains a reversing valve that can swap the refrigerant flow direction, making the indoor coil act as a condenser (heating) or evaporator (cooling). Source: "HVAC Fundamentals".

41. Air that is flowing into a space through gaps around doors, windows, and others.

a. Air intake

b. Air change

c. Infiltration

d. None of the above

Explanation: Infiltration is the unintentional or accidental introduction of outside air into a building, usually through cracks or uncontrolled openings. Source: Building Science and Energy Codes.

42. The difference between dry bulb and wet bulb temperatures

a. Wet bulb depression

b. Relative humidity

c. Dew point temperature

d. None of the above

Explanation: The wet-bulb depression indicates the amount of moisture the air can absorb; a larger depression implies drier air. Source: Psychrometrics / ASHRAE Fundamentals.

43. The temperature at which a liquid is converted to a solid state upon the removal of its latent heat of fusion.

a. Cooling point

b. Solid point

c. Freezing point

d. None of the above

Explanation: The freezing point is the characteristic temperature for a substance where it changes from liquid to solid. Source: Thermodynamics textbooks.

44. To reduce the relative humidity of air, it is recommended to use a __________

a. Humidifier

b. Dehumidifier

c. Pyrometer

d. None of the above

Explanation: Dehumidifiers remove moisture from the air by cooling it below its dew point, condensing the water vapor. Source: Air Conditioning system principles.

45. In a domestic refrigerator, the condenser can be found ______________

a. Inside the refrigerator cabinet

b. Outside the refrigerator cabinet

c. Beneath the freezer

d. None of the above

Explanation: Condensers reject heat into the ambient environment, so they are physically mounted outside the cooled cabinet (often on the back or bottom). Source: Domestic appliance repair guides.

46. Freezers in refrigerator compartments are normally found at the upper section of the cabinet for the reason that _____________

a. It is easy to load product to the freezer

b. It is easy to install the freezer in the cabinet

c. Cooling will efficiently be distributed to the refrigerator compartment

d. None of the above

Explanation: Cold air is denser than warm air. By placing the freezer at the top, cold air naturally falls to the lower compartments, establishing efficient convection currents. Source: Basic Fluid Mechanics and Heat Transfer.

47. Chilling injury of bananas will occur at a temperature

a. Below 27ºC

b. Below 14ºC

c. Below 5ºC

d. All of the above

Explanation: Bananas are tropical fruits susceptible to chilling injury (which halts ripening and damages the peel) if exposed to temperatures below 13-14°C (56-58°F). Source: FAO Agricultural Post-Harvest guidelines.

48. Lowest temperature that is safe for storage of bananas is _____________

a. Below 14ºC (Limit before injury)

b. Below 5ºC

c. Below 0ºC

d. All of the above

Explanation: 13-14°C is widely recognized as the absolute minimum safe holding temperature for bananas. Lower temperatures permanently interrupt the ethylene ripening process. Source: International Standards for Phytosanitary Measures.

49. When a product is termed as frozen storage, it is ______________

a. Chilled and stored above freezing point

b. Stored between -10ºF to 10ºF

c. Stored at 10ºF to 50 ºF

d. All of the above

Explanation: Deep commercial freezing requires keeping the product core entirely solid. A standard range of -18°C to -23°C (-0.4°F to -10°F) is commonly designated as "frozen storage". Source: FDA Food Code.

50. Another important factor in cold storage of perishable products is _____________

a. Energy and power requirement inside the storage room

b. Temperature and heat loss in the storage room

c. Humidity and air motion inside the storage room

d. None of the above

Explanation: While temperature is the primary parameter, Relative Humidity (to prevent wilting/desiccation) and Air Motion (to prevent mold or hot spots) are critical secondary factors for perishables. Source: Post-harvest handling manuals (e.g., UC Davis).

51. The use of a plastic polyethylene sheet as a packaging material for cold storage is __________

a. To provide a heat insulating effect on the product

b. To make the product attractive to the customer

c. To prevent moisture loss in the product

d. None of the above

Explanation: Polyethylene sheets are highly impermeable to water vapor. In cold storage, they act as a vapor barrier to prevent product dehydration and freezer burn. Source: "Food Packaging Science and Technology".

52. The purpose of refrigeration in storing perishable products is __________

a. To improve the quality of the product

b. To hasten ripening or maturity of products such as fruits and vegetables

c. To arrest or retard the natural process of deterioration

d. All of the above

Explanation: Refrigeration lowers the kinetic energy of molecules, slowing down microbial growth and enzymatic activity, thereby retarding natural deterioration. Source: ASHRAE Handbook - Refrigeration.

53. It is the process of exposing freshly harvested products and carefully prepared food to subzero temperatures and holding them at frozen storage temperatures to maintain the quality of the products.

a. Cold storage

b. Quick freezing

c. Sharp freezing

d. All of the above

Explanation: Quick freezing rapidly brings the internal temperature of food to subzero levels, producing smaller ice crystals which prevent cellular damage to the food. Source: Fundamentals of Food Process Engineering.

54. If vegetables are stored at a temperature between 0ºC to 4ºC, the product is under ________

a. Frozen storage

b. Refrigerated storage

c. All of the above

d. None of the above

Explanation: Storage between 0ºC and 4ºC is standard refrigerated (or chilling) storage, which keeps food cold but safely above freezing point. (Note: The original text had a typo of 30ºC, which has been corrected to 4ºC). Source: USDA Food Safety Guidelines.

55. Important factors that contribute to the proper refrigeration of perishable crops are ________

a. Constant temperature

b. Control of relative humidity

c. Free air circulation

d. All of the above

Explanation: Effective cold storage requires a stable temperature, adequate relative humidity to prevent wilting, and sufficient air motion to remove respiration heat. Source: FAO Post-Harvest Handling Manual.

56. It is the process of heating vegetables in steam or boiling water to inactivate enzymes and reduce microbial population, thereby prolonging storage at subfreezing temperatures.

a. Dehydration

b. Blanching

c. Drying

d. None of the above

Explanation: Blanching denatures tissue enzymes that would otherwise cause flavor and color deterioration even during frozen storage. Source: "Food Science" by Norman Potter.

57. Most favorable cold storage temperature for eggs.

a. 29-30ºC

b. 29-30ºF

c. 28ºF

d. None of the above

Explanation: Commercial egg storage aims for a temperature just above their freezing point, around -1ºC to -1.5ºC (approx 29-30ºF) for maximum longevity. Source: ASHRAE Refrigeration Handbook.

58. Freezing temperature for eggs.

a. 29-30ºC

b. 29-30ºF

c. 28ºF

d. None of the above

Explanation: Because of its solute content, an egg's freezing point is depressed slightly below that of pure water, typically freezing at roughly 28ºF (-2.2ºC). Source: USDA Egg Grading Manual.

59. Factors that change during cold storage of fish due to oxidation of fish oils and pigments particularly in more fatty species of fish.

a. Color and flavor

b. Color and texture

c. Flavor and texture

d. All of the above

Explanation: Lipid oxidation in fatty fish causes rancidity (off-flavors) and pigment degradation (color changes). Source: FAO Fisheries and Aquaculture Technical Papers.

60. A process of retarding moisture and oxidation loss from the product during cold storage by providing a continuous film or coating that will adhere to the surface of the product.

a. Blanching

b. Thawing

c. Glazing

d. None of the above

Explanation: Glazing involves dipping frozen seafood into cold water to form an ice layer, creating a physical barrier against sublimation (freezer burn) and oxygen. Source: Seafood Science and Technology.

61. A freezer that operates at an air temperature of -30ºF and below and a velocity of 500 to 1000 fpm.

a. Sharp freezer

b. Air blast freezer

c. Contact plate freezer

d. All of the above

Explanation: Blast freezers use high-velocity forced air circulation at extremely low temperatures to achieve rapid heat transfer away from the product. Source: ASHRAE Equipment Handbook.

62. A freezer used for fish products wherein the products are placed on shelves or in aluminum pans/plates covered by pipe coils or evaporators at temperatures of -20ºC to -29ºC.

a. Sharp freezer

b. Air-blast freezer

c. Contact plate freezer

d. All of the above

Explanation: Contact plate freezers press the packaged product between hollow metal plates containing circulating refrigerant, yielding excellent conduction heat transfer. Source: FAO Fisheries Technical Paper.

63. Freezing point of milk.

a. -0.545 ºC

b. -0.545 ºF

c. 0.545 ºC

d. None of the above

Explanation: Milk freezes slightly below the freezing point of water due to dissolved lactose and salts. Testing its freezing point (-0.540 to -0.545 ºC) is standard to ensure it hasn't been watered down. Source: Dairy Science / Cryoscopy of Milk.

64. A frozen product made of a pasteurized mixture of sugar, milk solids, stabilizer, food acid, flavorings (such as fruit juices/extracts), and water.

a. Ice cream

b. Sherbet

c. Frozen milk

d. All of the above

Explanation: Sherbet contains lower milk fat (typically 1-2%) compared to ice cream and usually has a higher acidity due to fruit juices. Source: FDA Code of Federal Regulations - Standard of Identity for frozen desserts.

65. Which of the following is commonly used for packaging frozen poultry products?

a. Plastic

b. Aluminum foil

c. Waxed cardboard

d. All of the above

Explanation: Heavy-duty plastic wraps (like shrink-wrap or vacuum-sealed polyethylene) are industry standard because they contour to the meat, creating an oxygen barrier that prevents freezer burn. Source: Meat/Poultry Packaging Technology.

66. A 3 hp engine is to be replaced with an electric motor. Recommended size of the motor for the drive.

a. 1 hp

b. 2 hp

c. 5 hp

d. None of the above

Explanation: Internal combustion engines are typically rated by peak intermittent output, while electric motors are rated for continuous duty. A standard conversion estimates electric motor HP at roughly 1/2 to 2/3 of an engine's HP. Source: Philippine Agricultural Engineering Standards (PAES) machinery guidelines.

67. Frozen poultry products are generally good for a period of _____________

a. 1-6 months

b. 6-12 months

c. 1-2 years

d. All of the above

Explanation: When kept continuously frozen at 0ºF (-18ºC), whole poultry can retain optimal quality for up to 1 year, while parts generally last about 9 months. Source: USDA Food Safety and Inspection Service.

68. Term used for the internal organs of poultry suitable for culinary use and cold storage.

a. Carcass

b. Giblets

c. Gills

d. None of the above

Explanation: Giblets specifically refer to the edible offal of poultry, including the heart, liver, and gizzard. Source: USDA Terminology.

69. In order to minimize the darkening of a poultry carcass, it is recommended that before cold storage, poultry meat should be ______________

a. Slowly frozen and undergo scalding process

b. Frozen rapidly

c. Undergo scalding process

d. None of the above

Explanation: Rapid freezing forces the formation of many small ice crystals in the meat tissue, which reflect light and result in a lighter, more desirable appearance than slow freezing. Source: Meat Processing Technology.

70. Tenderness of poultry meat can be maintained during cold storage by ______________

a. Storing it in moisture-proof packaging / aluminum foil

b. Storing it in a plastic net

c. Storing it unpacked

d. All of the above

Explanation: Proper protective wrapping prevents dehydration (freezer burn), which severely degrades the texture and tenderness of meat. Source: Food Preservation Science.

71. Changes in the flavor of meat, fish, or poultry during freezing is primarily due to the _____________

a. Change in temperature of the product

b. Microorganisms that were killed during storage

c. Oxidation of fats

d. None of the above

Explanation: Freezing pauses microbial growth but does not fully halt chemical reactions. Oxidation of lipids (fats) continues slowly, leading to rancidity and flavor changes. Source: Principles of Meat Science.

72. It is a method of freezing the surface of poultry meat using a mist or liquid prior to storage in an air blast freezer or cold storage room.

a. Liquid immersion freezing

b. Liquid spray freezing

c. Conveyor tunnel freezing

d. All of the above

Explanation: Liquid spray freezing rapidly crust-freezes the outer layer by spraying cold liquid (like propylene glycol), preserving the white color before it enters the air blast freezer. Source: Poultry Processing Protocols.

73. If a poultry product is stored at a temperature of 35-40ºF, the product quality can be maintained within _____________

a. 1 to 2 months

b. 1 to 2 days

c. 1 to 2 hours

d. None of the above

Explanation: 35-40ºF (1.6-4.4ºC) is standard refrigeration temperature. Raw poultry is highly perishable and should only be stored unfrozen for 1-2 days before cooking or freezing. Source: USDA Storage Guidelines.

74. It is the flesh obtained from domesticated animals.

a. Carcass

b. Meat

c. Giblets

d. None of the above

Explanation: By definition in culinary and food science fields, meat is animal tissue (primarily muscle) used as food, usually from domesticated mammals. Source: Standard Dictionary of Culinary Terms.

75. It is the meat obtained from hogs.

a. Beef

b. Pork

c. Veal

d. All of the above

Explanation: Pork is the culinary name for the meat of a domestic pig (hog). Source: Meat Industry definitions.

76. It is the meat of sheep that is less than one year old.

a. Lamb

b. Mutton

c. Chevon

d. None of the above

Explanation: Lamb refers to sheep under one year of age; mutton refers to meat from older sheep.  Source: USDA Meat Grading Standards.

77. It is meat from a rabbit.

a. Lapan

b. Venison

c. Chevon

d. None of the above

Explanation: "Lapan" is a localized term often used in the Philippines to describe rabbit meat. Venison is deer, chevon is goat. Source: Local Agricultural Terminology.

78. It is the meat from a goat.

a. Chevon

b. Mutton

c. Venison

d. All of the above

Explanation: Chevon is the standard commercial term used for goat meat. Source: USDA / Food industry terminology.

79. It is a method used in preserving meat.

a. Smoking process

b. Refrigeration

c. Freeze drying

d. All of the above

Explanation: Smoking reduces moisture and adds antimicrobial compounds; refrigeration slows decay; freeze-drying completely removes moisture via sublimation. All are valid preservation techniques. Source: Food Preservation Science.

80. It is meat from less than one-year-old cattle.

a. Beef

b. Veal

c. Cara beef

d. All of the above

Explanation: Veal is the meat of calves (young cattle), distinct from beef which comes from older cattle. Source: USDA Meat definitions.

81. Which of the following is true?

a. When beef is stored at a lower temperature it will have a longer storage life than when stored at a higher temperature

b. Storing beef at a higher temperature will increase its storage life

c. Proper handling reduces quality (false)

d. All of the above

Explanation: The Q10 temperature coefficient dictates that chemical deterioration and microbial growth rates drop significantly as temperature drops. Thus, colder temperatures yield longer storage. Source: Thermal Properties of Foods.

82. Myoglobin content in meat is responsible for _______________

a. Odor of meat after cold storage

b. The specific appearance of meat

c. Color of meat

d. Two of the above

Explanation: Myoglobin is the primary iron- and oxygen-binding protein found in muscle tissue that dictates the red color of meat, which directly impacts its visual appearance. Source: Meat Science Fundamentals.

83. It is the process of allowing meat to hang at a temperature of 0ºC to 3ºC to create a tenderizing effect before freezing.

a. Aging

b. Tempering

c. Freezing

d. None of the above

Explanation: Dry aging involves holding meat at strictly controlled low temperatures to allow endogenous enzymes to break down connective tissues, tenderizing the meat. Source: Meat Processing Standards.

84. Which of the following is true in the cold storage of meat?

a. Extreme temperature fluctuation during storage/defrosting contributes to the short storage life of the meat.

b. Proper handling prior to freezing reduces the quality.

c. Freezing meat improves its base quality.

d. None of the above

Explanation: Fluctuating temperatures cause ice crystals to melt and recrystallize into larger, jagged crystals that tear muscle fibers and ruin meat texture. Source: ASHRAE Refrigeration Handbook.

85. Freezer burn in meat products is a result of _______________

a. Storing a meat product in a freezer with a plastic sheet

b. Storing a meat product without a plastic sheet at high relative humidity

c. Storing a meat product without a plastic sheet at low relative humidity

d. None of the above

Explanation: Freezer burn is the surface dehydration of food via sublimation. It happens when food is unprotected in the dry, low-humidity environment of a freezer. Source: Food Preservation Science.

86. The recommended time for storing beef cuts at -18º C is ___________

a. 1 to 2 months

b. 6 to 12 months

c. 3 to 4 months

d. None of the above

Explanation: Solid cuts of beef like steaks and roasts can safely be stored at 0ºF (-18ºC) for 6 to 12 months without severe quality degradation. (Corrected based on USDA standards). Source: USDA Food Safety Guidelines.

87. Ground beef can be stored at -18º C within a period of __________

a. 6 to 12 months

b. 3-4 months

c. 1 to 2 months

d. None of the above

Explanation: Because grinding exposes much more surface area to oxygen and potential bacteria, ground meat has a significantly shorter freezer life (3 to 4 months) than solid cuts. Source: USDA Guidelines.

88. It is a method of freezing shrimp into an agitated cold brine solution of a fixed concentration and temperature.

a. Blast freezing

b. Immersion freezing

c. Tunnel freezing

d. None of the above

Explanation: Immersion freezing drops the product directly into a low-freezing-point liquid (like a brine or glycol solution), ensuring rapid heat transfer on all surfaces. Source: Seafood Processing Technology.

89. At -18º C, scallop meat has a frozen storage life of _____________

a. 1-2 months

b. 3-6 months

c. 7-12 months

d. None of the above

Explanation: Because scallops are lean seafood, they are less prone to rapid fat oxidation than fatty fish and can maintain good quality for several months (typically 6-12) if heavily glazed/vacuum sealed. Source: FDA Seafood Storage.

90. ASHRAE is the acronym for ___________

a. Association of Heat, Refrigeration, and Air Conditioning Engineers

b. American Society of Heating, Refrigerating and Air-Conditioning Engineers

c. Association of Sensible Heating, Refrigeration, and Air Conditioning Engineers

d. None of the above

Explanation: ASHRAE is the global professional society establishing the principal standards for HVAC and Refrigeration engineering. Source: ASHRAE.org.

91. An equipment that is used to clean, cool, heat, humidify, or dehumidify air.

a. Air heat exchanger

b. Air conditioner (or Air Handling Unit)

c. Air cooled condenser

d. All of the above

Explanation: A complete air conditioning unit (or HVAC system) alters the temperature, humidity, and cleanliness of air to meet environmental requirements. Source: ASHRAE Fundamentals.

92. The process of removing moisture from air.

a. Dehydration

b. Dehumidification

c. Air suction

d. All of the above

Explanation: Dehumidification refers to the mechanical or chemical extraction of water vapor from the air, usually accomplished by cooling air below its dew point. Source: Principles of HVAC.

93. It is historically the most popular refrigerant for residential air conditioning.

a. R-12 (Dichlorodifluoromethane)

b. R-22 (Chlorodifluoromethane)

c. R-502

d. All of the above

Explanation: R-22 was the global standard for unitary residential air conditioners before phase-outs due to ozone depletion. R-12 was primarily for automotive and refrigerators. (Corrected key). Source: EPA Refrigerant History.

94. It is historically the most popular refrigerant for residential air conditioning. (Duplicate)

a. R-12 (Dichlorodifluoromethane)

b. R-22 (Chlorodifluoromethane)

c. R-502 (Mixture of R-22 and R-115)

d. All of the above

Explanation: R-22 has the ideal pressure-temperature characteristics for human comfort cooling applications. Source: Modern Refrigeration and Air Conditioning.

95. A popular historical refrigerant for low-temperature commercial refrigeration systems (like supermarket freezers).

a. R-12

b. R-22

c. R-502

d. All of the above

Explanation: R-502 was specifically designed as an azeotropic blend to provide the excellent low-temperature capacity of R-22 while minimizing high compressor discharge temperatures. Source: ASHRAE Refrigerants Data.

96. It is the overall process by which air is cooled, cleaned, dehumidified, and circulated.

a. Air conditioner

b. Air conditioning

c. Air cooling and cleaning

d. All of the above

Explanation: While an air conditioner is the machine, "air conditioning" is the thermodynamic process defined by Willis Carrier that actively controls temperature, humidity, purity, and motion. Source: Willis Carrier patents / ASHRAE.

97. An air conditioning system wherein the condenser is located separately from the evaporator and uses interconnecting refrigerant lines.

a. Split-system air conditioning system

b. Packaged equipment air conditioning system

c. Window-type

d. None of the above

Explanation: Split systems "split" the heat-absorbing part (evaporator inside) from the heat-rejecting part (condenser outside) to minimize indoor noise and maximize exterior heat rejection. Source: HVAC Systems Design Handbook.

98. It is the cooling system component of an air conditioner.

a. Condenser

b. Evaporator

c. Compressor

d. Expansion valve

Explanation: The evaporator sits in the air stream. Inside it, cold liquid refrigerant absorbs heat from the air and boils into a vapor, actively cooling the room. Source: Thermodynamics of Vapor-Compression.

99. Condenser efficiency of an air conditioner can be increased by __________

a. Reducing the condenser surface area

b. Increasing the condenser surface area

c. Increasing the amount of refrigerant flowing in the condenser

d. None of the above

Explanation: According to the heat transfer equation (Q = U*A*dT), increasing the surface area (A) with more fins/coils directly increases the capacity of the condenser to reject heat. Source: Principles of Heat Transfer.

100. Typical operating temperature of an evaporator coil in a standard residential air conditioning system.

a. 20ºF

b. 40ºF

c. 60ºF

d. All of the above

Explanation: Standard comfort AC evaporators are designed to operate around 40ºF (4.4ºC). This safely prevents condensation from freezing on the coils (which happens at 32ºF) while keeping it cool enough to dehumidify the air. Source: HVAC Load and System Sizing Criteria.

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