Mechanical Engineering MCQs

Page No. 143

The bank of tubes at the back of domestic refrigerator are _________________?


acondenser tubes


bevaporator tubes


crefrigerant cooling tubes


dcapillary tubes


View Answer condenser tubes

Air refrigeration cycle is used in ____________________?


adomestic refrigerators


bcommercial refrigerators


cair conditioning


dgas liquefaction


View Answer gas liquefaction

For better COP of refrigerator, the pressure range corresponding to temperature in evaporator and condenser must be____________________?


asmall


bhigh


cequal


danything


View Answer small

Air refrigeration operates on_____________________?


aCarnot cycle


bReversed Carnot cycle


cRankine cycle


dBrayton cycle


View Answer Brayton cycle

Refrigeration in aeroplanes usually employs the following refrigerant___________________?


aCo2


bFreon-11


cFreon-22


dAir


View Answer Air

Rating of a domestic refrigerator is of the order of__________________?


a0.1 ton


b5 tons


c10 tons


d40 tons


View Answer 0.1 ton

The refrigerant for a refrigerator should have ___________________?


ahigh sensible heat


bhigh total heat


chigh latent heat


dlow latent heat


View Answer high latent heat

The domestic refrigerator uses following type of compressor ____________________?


acentrifugal


baxial


cminiature sealed unit


dpiston type reciprocating



Domestic refrigerator working on vapour compression cycle uses the following type of expansion device____________________?


aelectrically operated throttling valve


bmanually operated valve


cthermostatic valve


dcapillary tube


View Answer capillary tube

Presence of moisture in a refrigerant affects the working of___________________?


acompressor


bcondenser


cevaparator


dexpansion valve


View Answer expansion valve

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