Thermodynamics Questions and Answers – Heat Pump System

This set of Thermodynamics Multiple Choice Questions & Answers (MCQs) focuses on “Heat Pump System”.

1. A heat pump,
a) extracts energy at low temperature heat source
b) gives energy to high temperature heat source
c) both of the mentioned
d) none of the mentioned
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2. Which of the following is true for a heat pump and a refrigerator?
a) a refrigerator removes heat to achieve cooling
b) a heat pump supplies heat at high temperature
c) both of the mentioned
d) none of the mentioned
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3. A vapour compression heat pump has
a) compressor
b) evaporator
c) condenser
d) all of the mentioned
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4. Which of the following can be used to transfer heat to the refrigerant passing through evaporator?
a) outside air
b) water from rivers
c) the ground
d) all of the mentioned
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5. An air-air heat pump can be used for
a) heating during winter
b) cooling during summer
c) both of the mentioned
d) none of the mentioned
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6. The ideal gas refrigeration cycle is same as
a) the Brayton cycle
b) reversed Brayton cycle
c) the Rankine cycle
d) reversed Rankine cycle
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7. The condenser and evaporator in vapour compression system are called cooler and refrigerator respectively.
a) true
b) false
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8. The COP of refrigeration cycle is given by
a) 1 / {(p1/p2)^ɣ/(ɣ-1)]} – 1
b) 1 / {(p1/p2)^(ɣ-1)/ɣ]} – 1
c) 1 / {(p1/p2)^(ɣ-1)/ɣ]} + 1
d) none of the mentioned
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9. The COP of gas-cycle refrigeration cycle is very high.
a) true
b) false
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10. A gas-cycle refrigeration system is used in
a) aircrafts
b) missiles
c) both of the mentioned
d) none of the mentioned
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Sanfoundry Global Education & Learning Series – Thermodynamics.
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