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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.

Low 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: centrifugal pump

In a centrifugal pump, the liquid enters the pump__________________?

A at the top

B at the bottom

C at the center

D from sides

Review Detailed Answer

Correct Answer: at the center

In centrifugal pumps, maximum efficiency is obtained when the blades are_________________?

A straight

B bent forward

C bent backward

D radial

Review Detailed Answer

Correct Answer: bent backward

The optimum value of vane exit angle for a centrifugal pump impeller is_________________?

A 10-15°

B 20-25°

C 30-40°

D 50-60°

Review Detailed Answer

Correct Answer: 20-25°

If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge_____________________?

A same quantity of liquid

B 0.75 Q

C Q/0.75

D 1.5 Q

Review Detailed Answer

Correct Answer: same quantity of liquid

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

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Mechanical Engineering Mcqs 1919 MCQs [All-Courses]

All Topics 1919

All Topics 1919

Low specific speed of a pump implies it is____________________?

In a centrifugal pump, the liquid enters the pump__________________?

In centrifugal pumps, maximum efficiency is obtained when the blades are_________________?

The optimum value of vane exit angle for a centrifugal pump impeller is_________________?

If a pump is handling water and is discharging a certain flow Q at a constant total dynamic head requiring a definite B.H.P., the same pump when handling a liquid of specific gravity 0.75 and viscosity nearly same as of water would discharge_____________________?

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_________________?