Mechanical Engineering MCQs

2075 MCQs  (Page 53 of 208)

Attempt Mechanical Engineering Mcqs Quiz
An important characteristic of absorption system of refrigeration is__________________?
A. Nosiy operation
B. Quiet operation
C. Cooling below 0°c
D. Very little power consumption
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Vapor compression refrigeration is some what like ____________________?
A. carnot cycle
B. rankine cycle
C. reversed camot cycle
D. reversed rankine cycle
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Ammonia-absorption refrigeration cycle requires__________________?
A. Very little work input
B. Maximum work input
C. Nearly same work input as for vapour compression cycle
D. Zero work input
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One ton refrigeratiqn corresponds to_________________?
A. 50 kcal/min
B. 50 kcal/kr
C. 80 kcal/min
D. 80 kcal/hr
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A standard ice point temperature corresponds to the temperature of ___________________?
A. water at 0°c
B. ice at – 4°c
C. solid and dry ice
D. mixture of ice, water and vapour under equilibrium conditions under ntp conditions
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In vapour compression cycle the condition of refrigerant is superheated vapour _____________________?
A. After passing through the condenser
B. Before passing through the condenser
C. After passing through the expansion or throttle valve
D. Before [entering the expansion valve
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One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice_________________?
A. In 1 hour
B. In 1 minute
C. In 24 hours
D. In 12 hours
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Critical temperature is’ the temperature above which _____________________?
A. A gas will never liquefy
B. A gas will immediately liquefy
C. Water will evaporate
D. Water will never evaporate
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The COP of a domestic refrigerator___________________?
A. Is less than 1
B. Is more than 1
C. Is equal to 1
D. Depends upon the make
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Presence of moisture in a refrigerant affects the working of___________________?
A. Compressor
B. Condenser
C. Evaparator
D. Expansion valve
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Word of the Day
28 Sep
Expatriate
a person who lives outside their native country.
ملک بدری، جلا وطن کرن، شہر بدر کرنا

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