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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.

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

The moisture in a refrigerant is removed by___________________?

A evaporator

B safety relief valve

C dehumidifier

D driers

Review Detailed Answer

Correct Answer: driers

The vapor compression refrigerator employs the following cycle_________________?

A Rankine

B Carnot

C Reversed Rankine

D Brayton

Review Detailed Answer

Correct Answer: Carnot

The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?

A will be higher

B will be lower

C will remain unaffected

D may be higher or lower depending upon the nature of non-condensable gases

Review Detailed Answer

Correct Answer: will be higher

Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?

A atmospheric pressure

B slightly above atmospheric pressure

C 2-4 bars

D 5-6 bars

Review Detailed Answer

Correct Answer: 5-6 bars

In S.J. unit, one ton of refrigeration is equal to___________________?

A 210 kJ/min

B 21 kJ/min

C 420 kJ/min

D 840 kJ/min

Review Detailed Answer

Correct Answer: 210 kJ/min

The boiling point of ammonia is___________________?

A -100°C

B -50°C

C – 33.3°C

D 0°C

Review Detailed Answer

Correct Answer: – 33.3°C

In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid________________?

A after passing through the condenser

B before passing through the condenser

C after passing through the expansion or thiottle valve

D before entering the expansion valve

Review Detailed Answer

Correct Answer: before entering the expansion valve

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

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________________?

The moisture in a refrigerant is removed by___________________?

The vapor compression refrigerator employs the following cycle_________________?

The condensing pressure due to the presence of non-condensable gases, as compared to that actually required for condensing temperatures without non-condensable gases ____________________ ?

Allowable pressure on high-pressure side or ammonia absorption system is of the order of_________________?

In S.J. unit, one ton of refrigeration is equal to___________________?

The boiling point of ammonia is___________________?

In vapor compression cycle, the condition of refrigerant is high pressure saturated liquid________________?