Refrigeration & Air Conditioning MCQs
Refrigeration & Air Conditioning MCQs
Try to answer these 300+ Refrigeration & Air Conditioning MCQs and check your understanding of the Refrigeration & Air Conditioning subject.
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1: What do we need to live?
A. Sunlight
B. Fresh air
C. Water
D. Shelter
E. Food
2: What can accumulate if fresh air isn't exchanged?
A. Mould and mildews
B. Things that can rot
C. Dust mites
D. Excessive gases and toxic chemicals or residues
3: What kind of equipment is an Air Conditioner?
A. Oil extraction equipment
B. Electrical equipment
C. Heating equipment
D. Mechanical equipment
4: What cooling method takes advantage of the fact that an object with more surface area has more heat dissipation potential?
A. Air cooling
B. Liquid cooling
C. Heat Pipe cooling
D. Water cooling
5: What components are used to direct airflow into an assigned space?
A. Ceiling fans
B. Air vents
C. Air diffusers
D. Wall-mounted air conditioners
6: What are an air diffusers primary functions?
A. To control the pattern of the airflow into an assigned space
B. To disperse fragrance
C. To add warmth and comfort
D. To humidify the air
E. To disperse the air in a specific area
7: What is the movement of air through an Air Conditioning System and the through space to be conditioned?
A. Air Flow
B. Wind
C. Atmospheric Pressure
D. Condensation
E. Evaporation
8: What is the part of the central air system that moves heated or cooled air throughout the systems ductwork?
A. Air Conditioner
B. Compressor
C. Heat Pump
D. Air Handler
E. Heater
9: What is the A rating that denotes the efficiency of gas heating equipment?
A. Annual Fuel Utilization Efficiency
B. AFUE
C. Heating Capacity
D. BTU's Per Hour
E. Efficiency Rating of Equipment
10: What is the name of the organization that sets standards for testing and rating heat pumps and air conditioners?
A. National Association of Home Builders
B. National Home Energy Audit Alliance
C. International Energy Agency
D. Air Conditioning And Refrigeration Institute
E. American Society of Heating, Refrigerating, and Air-Conditioning Engineers
11: What does a control or thermostat provide for?
A. Controlling the temperature of a room
B. Activating a furnace
C. Automatic switching of an air conditioning system
D. Adjusting the heat output of a furnace
E. Regulating the temperature of a room
12: What does the term Auto Changeover mean?
A. A control or thermostat that provides for automatic switching of an air conditioning system from heating to cooling
B. A system that automatically replaces worn or damaged parts in a machine
C. The changeover of gears in a motor vehicle that enables the vehicle to operate more efficiently
D. The automatic switching of a lighting system from one light source to another
E. A method of manufacturing products by using machinery that is operated continuously
13: What type of air handling device moves air?
A. Receiver
B. Heat pump
C. Blower
D. A/C unit
E. Compressor
14: What type of system moves the air through the building?
A. Mechanical ventilation
B. Fire
C. A/C
D. Central heating and cooling
E. HVAC
15: What does "blower" mean?
A. A fan that blows air
B. A person who blows air into someone's face
C. A person who blows air into a balloon
D. A fan used to generate wind
E. An air handling device for moving air through a HVAC system
16: How many BTU in an hour?
A. Btu/hr
B. Kilowatt hours
C. BTUH
D. BTU
17: What is the name of the standard used to measure the amount of heat required to raise the temperature of a pound of water?
A. Kelvin
B. British Thermal Unit
C. Joule
D. Celsius
E. Calorie
18: What is the rate at which water rises when exposed to heat?
A. One degree Fahrenheit per minute
B. One degree Celsius per hour
C. One degree fahrenheit per hour
D. One foot per minute
E. One inch per hour
19: The amount of heat required to raise one pound of water one degree what is the common measure of heat transfer rate?
A. BTU
B. Joules per second
C. Watt
D. British thermal units per hour
E. Fahrenheit per hour
20: What is the amount of heat required to raise one pound of water one degree fahrenheit per hour?
A. The Kelvin scale
B. The abbreviation for British thermal units per hour
C. 1,055 BTU
21: What is the ability of a heating or cooling system to heat or cool a given amount of space?
A. Efficiency
B. Capacity
C. Effectiveness
D. Energy
E. Temperature
22: A heating or cooling system's capacity can be measured in what?
A. Watts
B. Cubic feet
C. Gallons
D. BTU’s
23: How can the capacity of a system be expressed?
A. In BTU’s
B. In kg
C. In litres
24: What is Carbon Monoxide a product of?
A. Breathing
B. Burning any fuel
C. Automobiles
D. Humans
E. Vehicles
25: What is the color of carbon monoxide?
A. Pale pink
B. Gray
C. Brown
D. Colorless
E. Green
26: What does the term central air conditioning system mean?
A. System in which air is treated at a central location
B. The air conditioning unit in your home
C. The air conditioner in your room
D. A machine used to cool the inside of a building
E. A cooling device that uses the outside air
27: What is the device that rotates in the Centrifugal Compressor?
A. Fan
B. Impeller
C. Blower
D. Drum
E. Rings
28: In what type of compressor is the refrigerant drawn into the device axially?
A. Pneumatic Compressor
B. Homemade Compressor
C. Centrifugal Compressor
D. Rotary Compressor
29: What does CFM stand for?
A. Central Fan Motor
B. Circular Flow Meters
C. Celsius degrees
D. Cubic Feet per Minute
E. Cotton fibers per minute
30: What is the abbreviation for cubic feet per minute?
A. MPH
B. NM
C. CFM
31: What term is used to describe the amount of refrigerant in a system?
A. Discharge
B. Refrigerant
C. Charge
D. Quota
E. System
32: How many charge of refrigerant are needed for proper system operation?
A. The refrigerant used in an air conditioner
B. One charge of refrigerant
C. The R-22 refrigerant
D. The quantity of refrigerant required for proper system operation
33: What is the air conditioning system type that doesn't contain refrigerant?
A. Central Air Conditioning System
B. Chilled Water System
C. Heat Exchanger
D. Heat Pump System
34: Comfort air conditioning systems are designed for the comfort of what?
A. Pets
B. Insects
C. Animals
D. People
35: Comfort Air Conditioning systems are designed for the comfort of people, not the protection of what?
A. Appliances
B. Refrigeration units
C. Electric motors
D. Computers
E. Computer-based electrical systems
36: What is used to pump refrigerant from a condensing unit through an evaporator coil?
A. Pump
B. Evaporation coil
C. Fan
D. Pumps
E. Compressor
37: What does a condenser do?
A. Produces electricity
B. Transfers and rejects heat
C. Filters air
D. Absorbs water vapor to make steam
E. Expands and contracts to control temperature
38: What controls are typically included in the condensing unit?
A. Water
B. Pressure switch
C. Various
D. Air
E. Heater
39: What part of a split system contains the outdoor compressor and the condenser coil?
A. Indoor Unit
B. Outdoor Compressor
C. Heater
D. Condensing Unit
40: What is the measure of the ability of a unit to remove and transfer heat?
A. Thermal Capacity
B. Heat Capacity
C. Heat Removal Rate
D. Cooling Capacity
41: How many BTU’s are in a ton?
A. 8,000
B. 10,000
C. 12,000
42: In what year was the Cooling and Heating Load Manual published?
A. 1985
B. 1979
C. 1984
D. 1990
43: What is the total heat gains through a building for the purposes of sizing HVAC equipment?
A. Combined Cooling and Heating Load
B. Cooling Gain
C. Cooling Load
D. Heating Load
44: What did the cooling load calculation method first appear in?
A. 1967 ASHRAE Handbook
B. 1985 ASHRAE Cooling and Heating Load Manual
C. 1955 ASHRAE Handbook
D. 1979 ASHRAE Cooling and Heating Load Manual
45: What are used in zoning to regulate airflow to certain rooms?
A. Dampers
B. Air filters
C. Ceiling fans
D. Windows
46: What are two things that can build up on an outdoor heat pump coil?
A. Leaves or debris buildup
B. Dirt or dust buildup
C. Ice or frost buildup
D. Leaves or branches buildup
E. Debris accumulation on the coil
47: What kind of buildup is removed during the defrost cycle?
A. Slush or snow
B. Dry ice or sub zero
C. Frost or water
D. Frost or ice
E. Ice or frost
48: What does dehumidification reduce water vapor in air by?
A. Making the air wetter
B. Making water vapor condense
C. Making the air less humid
D. Reducing the humidity of the air
E. Cooling the air
49: How does dehumidification work?
A. The reduction of water vapor in air by adsorption to particles
B. The absorption of water vapor by materials such as insulation
C. Absorption of water vapor by the material
D. Condensation of water vapor on surfaces
E. The reduction of water vapor in air by cooling the air below the dew point
50: What type of air is pulled into the furnace by the vent?
A. Fresh air
B. Air from the chimney
C. Room air
D. Polluted air
E. Outside air
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