MCQ About The Chiller Plant

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Table of Contents

#1. What is the primary function of a chiller in HVAC systems?

A) Heating

B) Cooling

C) Ventilation

D) Humidification

#2. What is the purpose of the evaporator in a chiller system?

A) Condensing refrigerant

B) Absorbing heat from the chilled water

C) Expanding refrigerant

D) Compressing refrigerant

#3. What does COP stand for in the context of chillers?

A) Cooling Output Parameter

B) Coefficient of Pressure

C) Chilled Operation Power

D) Coefficient of Performance

#4. In a chiller, what component is responsible for removing heat from the refrigerant and transferring it to the outside air or water?

A) Evaporator

B) Compressor

C) Condenser

D) Expansion Valve

#5. What type of chiller uses a rotating screw or scroll compressor?

A) Absorption Chiller

B) Centrifugal Chiller

C) Reciprocating Chiller

D) Scroll Chiller

#6. Which of the following is a measure of the chiller's ability to maintain a stable water temperature?

A) kW/ton

B) Approach Temperature

C) Leaving Water Temperature

D) Delta T

#7. What is the purpose of the expansion valve in a chiller system?

A) Increase refrigerant pressure

B) Control the flow pressure of refrigerant into the evaporator

C) Remove moisture from the refrigerant

D) Exchange heat with the surroundings

#8. Which parameter is used to measure the efficiency of a chiller in terms of energy consumption?

A) Approach Temperature

B) Load Factor

B) Chilled Water Flow Rate

D) Coefficient of Performance (COP)

#9. What is the typical range of chilled water temperatures supplied by chillers for air conditioning applications?

A) 0°C to 5°C

B) 5°C to 12°C

C) 10°C to 18°C

D) 25°C to 35°C

#10. What factor is indicated by the term "kW/ton" in chiller specifications?

A) Chilled water flow rate

B) Heat rejection capacity

C) Energy efficiency

D) Refrigerant type

#11. What is the formula for calculating the Coefficient of Performance (COP) of a chiller?

A) COP = Evaporator Heat Absorbed / Condenser Heat Rejected

B) COP = Compressor Power Input / Cooling Output Power

C) COP = Cooling Output Power / Compressor Power Input

D) COP = Condenser Heat Rejected / Evaporator Heat Absorbed

#12. If a chiller has a cooling capacity of 500 kW and a power input of 150 kW, what is its COP?

A) 3.33

B) 2.5

C) 0.3

D) 1.5

#13. If a chiller has a Chilled Water Flow Rate of 1000 gallons per minute (GPM) and a Delta T of 10°F, what is the cooling capacity in tons? (1 ton = 12,000 BTU/h)

A) 100 tons

B) 120 tons

C) 150 tons

D) 200 tons

#14. What is the purpose of a VFD (Variable Frequency Drive) in a chiller system?

A) Control compressor speed

B) Increase condenser heat rejection

C) Maintain a constant approach temperature

D) Regulate refrigerant flow rate

#15. Which type of chillers is known for providing high efficiency at partial load conditions?

A) Absorption Chillers

B) Centrifugal Chillers

C) Reciprocating Chillers

D) Variable Refrigerant Flow (VRF) Systems

#16. How does the Coefficient of Performance (COP) relate to the efficiency of a chiller?

A) Higher COP indicates lower efficiency

B) Lower COP indicates higher efficiency

C) COP is not related to efficiency

D) COP is inversely proportional to the cooling capacity

#17. What is the purpose of the condenser in a chiller system?

A) To absorb heat from the chilled water

B) To reject heat to the surroundings

C) To control refrigerant flow

D) To regulate compressor speed

#18. What is the function of the bypass valve in a chiller system?

A) Regulate refrigerant flow

B) Control compressor speed

C) Ensure constant evaporator pressure

D) Prevent freezing in the evaporator

#19. What is the primary difference between air-cooled and water-cooled chillers?

A) The type of refrigerant used

B) The method of rejecting heat

C) The compressor type

D) The COP value

Finish