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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