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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.

In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?

A designing new impeller

B trimming the impeller size to the required size by machining

C not possible

D some other alterations in the impeller

Review Detailed Answer

Correct Answer: trimming the impeller size to the required size by machining

Multistage centrifugal pumps are used to obtain___________________?

A high discharge

B high head

C pumping of viscous fluids

D high head and high discharge

Review Detailed Answer

Correct Answer: high head

When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?

A horizontal

B nearly horizontal

C steep

D first rise and then fall

Review Detailed Answer

Correct Answer: steep

Centrifugal pump is started with its delivery valve __________________?

A kept fully closed

B kept fully open

C irrespective of any position

D kept 50% open

Review Detailed Answer

Correct Answer: kept fully closed

For starting an axial flow pump, its delivery valve should be____________________?

A closed

B open

C depends on starting condition and flow desired

D could be either open or closed

Review Detailed Answer

Correct Answer: open

The hydraulic turbines are also known as : ___________?

A steam turbines

B water turbines

C combustion turbines

D Gas turbines

Review Detailed Answer

Correct Answer: water turbines

In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?

A rectilinear flow

B radial flow

C free vortex motion

D forced vortex

Review Detailed Answer

Correct Answer: free vortex motion

For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred_________________?

A centrifugal

B axial flow

C reciprocating

D mixed flow

Review Detailed Answer

Correct Answer: axial flow

High specific speed of a pump implies it is_____________________?

A centrifugal pump

B mixed flow pump

C axial flow pump

D any one of the above

Review Detailed Answer

Correct Answer: axial flow pump

Low specific speed of turbine implies it is__________________?

A propeller turbine

B Francis turbine

C impulse turbine

D any one of the above

Review Detailed Answer

Correct Answer: impulse turbine

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

In a single casing, multistage pump running at constant speed, the capacity rating is to be slightly lowered. It can be done by_______________?

Multistage centrifugal pumps are used to obtain___________________?

When a piping system is made up primarily of vertical lift and very little pipe friction, the pump characteristics should be _________________?

Centrifugal pump is started with its delivery valve __________________?

For starting an axial flow pump, its delivery valve should be____________________?

The hydraulic turbines are also known as : ___________?

In a centrifugal pump casing, the flow of water leaving the impeller, is___________________?

For very high discharge at low pressure such as for flood control and irrigation applications, following type of pump is preferred_________________?

High specific speed of a pump implies it is_____________________?

Low specific speed of turbine implies it is__________________?