# Refrigeration and Air-conditioning (Mechanical Engineering) 5 Online Test

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1, 2 and 3
1, 2 and 4
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A capillary tube is used in a small refrigerator to serve the purpose of
Thermostat
Expansion valve
Drier
Evaporator
The throttling operation in a refrigeration cycle is carried out in______
Evaporator
Discharge valve
Capillary tube
Expansion valve
All of the following pipe connections in a vapour compression system require thermal insulation, except
Between compressor outlet and condenser
Between condenser outlet and expansion valve
Between expansion valve and evaporator
Between evaporator and compressor
In a refrigeration system, expansion valve is incorporated between
Evaprorator and compressor
Condenser and evaporator
Compressor and condenser
Superheater and subcooler
The sequential order of different components of a vapour compression refrigeration system is
Compressor, condenser, throttle valve, evaporator
Compressor,throttle valve, evaporator,condenser
Compressor, evaporator, throttle valve, condenser
Compressor, throttle valve, condenser, evaporator
During refrigeration cycle based on vapour compression system, the heat is rejected by the refrigerant in
Condenser
Expansion valve
Evaporator
Compressor
During which component of vapour compression refrigeration system, the enthalpy remains constant?
Condenser
Throttle valve
Evaporator
Compressor
The relative humidity
Is the mass of water vapour per unit volume of air-water vapour mixture
Represents the ratio of the masss of water vapour to the mass of dry air in a given volume of air-water vapour mixture
Denotes the amount of water vapour actually present in air as percentage of maximum anomunt that could be present at that particular temperature
Represents the ratio of mass of water vapour associated with unit mass of dry air to the mass of water vapour associated with unit mass of dry air saturated at the same temperature
Which of the following statements is not true in the context of vapour compression refrigeration cycle?
The refrigerant occurs as high pressure saturated liquid between the condenser and expansion valve
The refrigerant is generally in the form of wet vapour in the evaporator
The refrigerant occurs as high pressure liquid in the condenser
The high temperature of refrigerant occurs when the vapour leaves the throttle valve
The superheated vapour state of refrigerant in a vapour compression cycle occurs_____
Before entering the expansion valve
After leaving the evaporator
At exit from the compressor
After passing through the condenser
What is the state of refrigerant before and after the expansion valve in a vapour compression system?
Saturated liquid; very wet vapour
Very wet vapour;fairly dry vapour
Superheated vapour;saturated liquid
Fairly dry vapour;superheated vapour
After passing through the expansion or throttle valve, the condition of refrigerant in a vapour compression refrigeration cycle is
High pressure saturated liquid
Very wet vapour
Fairly dry saturated vapour
Low pressure superheated vapour
In the vapour compression refrigeration system, the refrigerant before entering the expansion device or throttle valve is in the form of
Wet vapour at low pressure
Wet vapour at high pressure
High pressure saturated liquid
Low pressure saturated liquid
During refrigeration cycle, based on vapour compression system, the refrigerant exists as high pressure liquid at exit from the
Condenser
Throttle valve
Evaporator
Compressor
In the vapour compression refrigeration cycle, the refrigerant is generally in the form of fairly wet vapour at entry to the________
Condenser
Throttle valve
Evaporator
Compressor
Description:

This is an exclusive test on Refrigeration and Air-conditioning under a series of tests of Mechanical Engineering which is attributed to Competitive Examination Preparations e.g. IAS (Optional), GATE, IES etc.

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very good for all exams

2334 days 14 hours 19 minutes ago

A VERY GOOD TEST

2342 days 8 hours 23 minutes ago

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