Q.1
In a refrigerating machine, heat rejected is _________ heat absorbed.
Q.2
During sensible heating of air _________ decreases.
Q.3
During humidification process, __________ increases.
Q.4
The boiling point of ________ is 10.5°C.
Q.5
Pick up the correct statement about giving up of heat from one medium to other in ammonia absorption system
Q.6
Highest pressure encountered in a refrigeration system should be
Q.7
In a vapour compression system, the condition of refrigerant before passing through the condenser is
Q.8
Which of the following cycles uses air as the refrigerant?
Q.9
Under cooling in a refrigeration cycle
Q.10
The heat rejection factor (HRF) is given by
Q.11
In a spray washing system, if the temperature of water is higher than the dry bulb temperature of entering air, then the air is
Q.12
An important characteristic of absorption system of refrigeration is
Q.13
The evaporator used in household refrigerators is
Q.14
Chaperon equation is a relation between
Q.15
In vapour compression cycle, the condition of refrigerant is high pressure saturated liquid
Q.16
If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be
Q.17
In vapour compression cycle, the condition of refrigerant is saturated liquid
Q.18
In a vapour compression system, the condition of refrigerant is dry saturated vapour
Q.19
In vapour compression cycle the condition off refrigerant is dry saturated vapour
Q.20
The refrigerant used in small tonnage commercial machines (hermetically sealed units) is
Q.21
The refrigeration effect in a dry evaporator compared to flooded evaporator in a similar plant is
Q.22
During a refrigeration cycle, heat is rejected by the refrigerant in a
Q.23
Freon group of refrigerants are
Q.24
The Freon group of refrigerants are
Q.25
One ton of the refrigeration is
Q.26
The power per tonne of refrigeration is
Q.27
The optimum effective temperature for human comfort is
Q.28
An evaporator is also known as
Q.29
A refrigeration cycle operates between condenser temperature of + 27°C and evaporator temperature of -23°C. The Carnot coefficient of performance of cycle will be
Q.30
The bypass factor (B. P. F.) in case of sensible heating of air is (Where td₁ = Dry bulb temperature of air entering the heating coil, td₂ = Dry bulb temperature of air leaving the heating coil, and td₃ = Dry bulb temperature of heating coil)
0 h : 0 m : 1 s