WorksheetsRAC Module 1 Quiz
Total questions: 13
Worksheet time: 11mins
Refrigeration is defined as
Cooling down a hot object to surrounding temperature
Cooling a substance to any temperature lower than its surroundings
Boiling of water to form steam
Making puddings and cakes
A device which heats up a room when outside is cold is called (a)
Choose the correct sentence from below
COP of a refrigerator is always positive but cannot be below 1
COP of a refrigerator is always positive but can be below 1
COP can be negative or positive
COP is always negative
Choose the correct relationship from below
Carnot COP of heat pump = Carnot COP of refrigerator + 1
Carnot COP of heat pump = Carnot COP of refrigerator - 1
Carnot COP of heat pump = 1 - Carnot COP of refrigerator
Carnot COP of heat pump = Carnot COP of refrigerator
A Carnot refrigerator works between -20°C and 20°C. Find the COP
5.65
7.35
6.32
6.85
1 ton of refrigeration equals
3.5 kW
2.1 kW
3 kW
1 kW
The heat which results in only phase change but does not change the temperature of the substance is called
Sensible heat
Phase heat
Latent heat
Normal heat
Which among the following is NOT an application of refrigeration
Food storage
Energy generation
Vaccine storage
LNG transport
A refrigeration system removes 4250 kJ of heat from a space in 10 minutes . Find the refrigeration capacity in ton of refrigeration ( TR)
1 TR
2 TR
1.5 TR
4 TR
Co-efficient of Performance (COP) of a heat pump is defined as
Heat removed/Work done
Heat rejected/ Work done
Work done/ Heat removed
Work done/ Heat rejected
What is the primary purpose of a refrigeration cycle?
To convert heat into work
To increase the temperature of a substance
To remove heat from a low-temperature reservoir
To generate electricity
The efficiency of a refrigeration cycle is often measured by which of the following?
Co-efficient of Performance (COP)
Energy efficiency ratio (EER)
Thermal efficiency
Mechanical efficiency
What is the main function of a heat pump?
To transfer heat from a colder area to a warmer area
To generate electricity
To increase the temperature of a substance
To cool a space by removing heat
