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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.

Which of the following fuels can be used in turbojet engines _____________________?

A liquid hydrogne

B high speed diesel oil

C kerosene

D demethylated spirit

Review Detailed Answer

Correct Answer: kerosene

A jet engine works on the principle of conservation of____________________?

A mass

B energy

C flow

D linear momentum

Review Detailed Answer

Correct Answer: linear momentum

Ram compression in turbojet involves____________________?

A reduction of speed of incoming air and conversion of part of it into pressure energy

B compression of inlet air

C increasing speed of incoming air

D lost work

Review Detailed Answer

Correct Answer: reduction of speed of incoming air and conversion of part of it into pressure energy

The power available for take off and climb in case of turbojet engine as compared to reciprocating engine is ___________________?

A less

B more

C same

D may be less or more depending on ambient conditons

Review Detailed Answer

Correct Answer: less

Intercooling in gas turbine results in ____________________ ?

A increase in net output but decrease in thermal efficiency

B increase in thermal efficiency but decrease in net output

C increase in both thermal efficiency and net output

D decrease in both thermal efficiency and net output

Review Detailed Answer

Correct Answer: increase in net output but decrease in thermal efficiency

If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches _________________?

A isothermal

B isentropic

C adiabatic

D isochoric

Review Detailed Answer

Correct Answer: isothermal

In jet engines, paraffin is usually used as the fuel because of its _________________?

A high calorific value

B ease of atomisation

C low freezing point

D A. and C. above

Review Detailed Answer

Correct Answer: A. and C. above

Turbo propeller has the following additional feature over the turbojet __________________?

A peopeller

B diffuser

C intercooler

D turbine and combustion chamber

Review Detailed Answer

Correct Answer: peopeller

In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of__________________?

A vacuum

B atmospheric air

C compressed air

D oxygen alone

Review Detailed Answer

Correct Answer: compressed air

In gas turbines^ high thermal efficiency is obtained in_________________?

A closed cycle

B open cycle

C both of the above

D closed/open depending on other con-siderations

Review Detailed Answer

Correct Answer: closed cycle

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Which of the following fuels can be used in turbojet engines _____________________?

A jet engine works on the principle of conservation of____________________?

Ram compression in turbojet involves____________________?

The power available for take off and climb in case of turbojet engine as compared to reciprocating engine is ___________________?

Intercooling in gas turbine results in ____________________ ?

If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches _________________?

In jet engines, paraffin is usually used as the fuel because of its _________________?

Turbo propeller has the following additional feature over the turbojet __________________?

In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of__________________?

In gas turbines^ high thermal efficiency is obtained in_________________?