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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

Mechanical Engineering MCQs prepared for job test and interview preparation, especially for fresh graduates, students, and candidates appearing in competitive exams. These multiple-choice questions cover key topics such as Machine Design, Theory of Machines, Hydraulic Machines, and other important mechanical engineering concepts.

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

A electrically operated throttling valve

B manually operated valve

C thermostatic valve

D capillary tube

Review Detailed Answer

Correct Answer: capillary tube

Presence of moisture in a refrigerant affects the working of___________________?

A compressor

B condenser

C evaparator

D expansion valve

Review Detailed Answer

Correct Answer: expansion valve

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

Review Detailed Answer

Correct Answer: is more than 1

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

Review Detailed Answer

Correct Answer: a gas will never liquefy

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

Review Detailed Answer

Correct Answer: in 24 hours

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

Review Detailed Answer

Correct Answer: before passing through the condenser

One ton refrigeratiqn corresponds to_________________?

A 50 kcal/min

B 50 kcal/kr

C 80 kcal/min

D 80 kcal/hr

Review Detailed Answer

Correct Answer: 50 kcal/min

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

Review Detailed Answer

Correct Answer: very little work input

An important characteristic of absorption system of refrigeration is__________________?

A noisy operation

B quiet operation

C cooling below 0°C

D very little power consumption

Review Detailed Answer

Correct Answer: quiet operation

In vapour compression cycle, the conditii of refrigerant is saturated liquid________________?

A after passing through the condenser

B before passing through the condensei

C after passing through the expansion throttle valve

D before entering the expansion valve

Review Detailed Answer

Correct Answer: after passing through the condenser

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

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

Presence of moisture in a refrigerant affects the working of___________________?

The COP of a domestic refrigerator___________________?

Critical temperature is’ the temperature above which _____________________?

One ton of refrigeration is equal to the refrigeration effect corresponding to melting of 1000 kg of ice_________________?

In vapour compression cycle the condition of refrigerant is superheated vapour _____________________?

One ton refrigeratiqn corresponds to_________________?

Ammonia-absorption refrigeration cycle requires__________________?

An important characteristic of absorption system of refrigeration is__________________?

In vapour compression cycle, the conditii of refrigerant is saturated liquid________________?