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.

Surging phenomenon in centrifugal com-pressor depends on ___________________?

A mass flow rate

B pressure ratio

C change in load

D stagnation pressure at the outlet

Review Detailed Answer

Correct Answer: stagnation pressure at the outlet

Gas turbines for power generaion are normally used___________________?

A to supply base load requirements

B to supply peak load requirements

C to enable start thermal power plant

D in emergency

Review Detailed Answer

Correct Answer: to supply peak load requirements

Open cycle gas turbine works on___________________?

A Brayton or Atkinson cycle

C Carnot cycle

D Erricsson cycle

Review Detailed Answer

Correct Answer: Brayton or Atkinson cycle

The work ratio of simple gas turbine cycle depends on_________________?

A pressure ratio

B maximum cycle temperature

C minimum cycle temperature

D all of the above

Review Detailed Answer

Correct Answer: all of the above

The vloumetric efficiency of compressor with increase in compression ratio will ___________________?

A increase

B decrease

C remain same

D may increase/decrease depending on clearance volume

Review Detailed Answer

Correct Answer: decrease

Axial flow compressor resembles____________________ ?

A centrifugal pump

B reciprocating pump

C turbine

D sliding vane compressor

Review Detailed Answer

Correct Answer: turbine

Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm . The air pressure will be_____________________ ?

A 1.03 kg/cm2

B 1.06 kg/cm2

C 1.00 kg/cm2

D 0.53 kg/cm2

Review Detailed Answer

Correct Answer: 1.00 kg/cm2

Axial flow compressor has the following advantage over centrifugal compressor__________________?

A larger air handling ability per unit frontal area

B higher pressure ratio per stage

C aerofoil blades are used

D higher average velocities

Review Detailed Answer

Correct Answer: larger air handling ability per unit frontal area

Maximum delivery pressure is a rotary air compressor is of the order of__________________?

A 6 kg/cm2

B 10 kg/cm2

C 16 kg/cm2

D 25 kg/cm2

Review Detailed Answer

Correct Answer: 10 kg/cm2

The thermodynamic efficiency of rotary compressor is based on_______________?

A isothermal compression

B adiabatic compression

C isentropic compression

D polytropic compression

Review Detailed Answer

Correct Answer: adiabatic compression

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Surging phenomenon in centrifugal com-pressor depends on ___________________?

Gas turbines for power generaion are normally used___________________?

Open cycle gas turbine works on___________________?

The work ratio of simple gas turbine cycle depends on_________________?

The vloumetric efficiency of compressor with increase in compression ratio will ___________________?

Axial flow compressor resembles____________________ ?

Atmospheric pressure is 1.03 kg/cm and vapour pressure is 0.03 kg/cm . The air pressure will be_____________________ ?

Axial flow compressor has the following advantage over centrifugal compressor__________________?

Maximum delivery pressure is a rotary air compressor is of the order of__________________?

The thermodynamic efficiency of rotary compressor is based on_______________?