MCQsDrive | MCQsDrive

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.

When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?

A horizontal

B nearly horizontal

C steep

D first rise and then fall

Review Detailed Answer

Correct Answer: horizontal

The efficiency of a centrifugal pump is maximum when its blades are__________________?

A straight

B bent forward

C bent backward

D bent forward first and then backward

Review Detailed Answer

Correct Answer: bent backward

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?

A high initial and maintenance cost

B lower discharge

C lower speed of operation

D necessity of air vessel

Review Detailed Answer

Correct Answer: high initial and maintenance cost

Axial flow 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 open

One horsepower is equal to_________________?

A 102 watts

B 75 watts

C 550 watts

D 736 watts

Review Detailed Answer

Correct Answer: 736 watts

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

Showing 11 to 20 of 58 results

Contact Info

Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

When a piping system is made up primarily of friction head and very little of vertical lift, then pump characteristics should be__________________?

The efficiency of a centrifugal pump is maximum when its blades are__________________?

Reciprocating pumps are no more to be seen in industrial applications (in comparison to centrifugal pumps) because of____________________?

Axial flow pump is started with its delivery valve________________?

One horsepower is equal to_________________?

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____________________?