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.

Choose the correct statement ________________?

A gas turbine requires lot of cooling water

B gas turbine is capable of rapid start up and loading

C gas turbines have flat efficiency at part loads

D gas turbines have high standby losses and require lot of maintenance

Review Detailed Answer

Correct Answer: gas turbine is capable of rapid start up and loading

Pick up the correct statement ?

A large gas turbines use radial inflow turbines

B gas turbines have their blades similar to steam turbine

C gas .turbine’s blade will appear as impulse section at the hub and as a reaction section at tip

D gas turbines use both air and liquid cooling

Review Detailed Answer

Correct Answer: gas .turbine’s blade will appear as impulse section at the hub and as a reaction section at tip

Pick up the wrong statement ?

A pulsojet requires no ambient air for propulsion

B ramjet-engine has no turbine

C turbine drives compressor in a burbojet

D bypass turbo-jet engine increases the thrust without adversely affecting, the propulsive efficiency and fuel economy

Review Detailed Answer

Correct Answer: pulsojet requires no ambient air for propulsion

Pick up the false statement ?

A gas turbine is a self-starting unit

B gas turbine does not require huge quantity of water like steam plant

C exhaust losses in gas turbine are high due to large mass flow rate

D overall efficiency of gas turbine plant is lower than that of a reciprocating engine

Review Detailed Answer

Correct Answer: gas turbine is a self-starting unit

In jet engines the products of combustion after passing through the gas lurbine are discharged into_______________?

A atmosphere

B back to the compressor

C discharge nozzle

D vacuum

Review Detailed Answer

Correct Answer: discharge nozzle

If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?

A Vi=V0B

B Vt>V0

C U,<V0

D V,= U0

Review Detailed Answer

Correct Answer: Vi=V0B

The working fluid in ai turbine is___________________?

A in two phases

B in three phases

C in a single phase

D in the form of air and water mixture

Review Detailed Answer

Correct Answer: in a single phase

The compression ratio in a gas turbine is of the roder of____________________?

A 3.5 : 1

B 5 : 1

C 8 : 1

D 12 : 1

Review Detailed Answer

Correct Answer: 8 : 1

Ram-jet engine__________________?

A is self-operating at zero flight speed

B is not self-operating at zero^flight speed

C requires no air for its operation

D produces a jet consisting of plasma

Review Detailed Answer

Correct Answer: is not self-operating at zero^flight speed

A simple turbo-jet engine is basically_________________?

A a propeller system

B gas-turbine engine equipped with a propulsive nozzle and diffuse*

C chemical rocket regine

D ram-jet enigne

Review Detailed Answer

Correct Answer: gas-turbine engine equipped with a propulsive nozzle and diffuse*

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Choose the correct statement ________________?

Pick up the correct statement ?

Pick up the wrong statement ?

Pick up the false statement ?

In jet engines the products of combustion after passing through the gas lurbine are discharged into_______________?

If V, U and Vr represent the absolute velocity of fluid, velocity of blade, and relative velocity of fluid, and suffix i and o stand for entry and exit conditions, then in a rotary machine whose degree of reaction is unity______________?

The working fluid in ai turbine is___________________?

The compression ratio in a gas turbine is of the roder of____________________?

Ram-jet engine__________________?

A simple turbo-jet engine is basically_________________?