Hydraulic Machines MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Hydraulic Machines, a fundamental topic in the field of Mechanical Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Hydraulic Machines MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Hydraulic Machines mcq questions that explore various aspects of Hydraulic Machines problems. Each MCQ is crafted to challenge your understanding of Hydraulic Machines principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Mechanical Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Hydraulic Machines MCQs are your pathway to success in mastering this essential Mechanical Engineering topic.

Note: Each of the following question comes with multiple answer choices. Select the most appropriate option and test your understanding of Hydraulic Machines. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

So, are you ready to put your Hydraulic Machines knowledge to the test? Let's get started with our carefully curated MCQs!

Hydraulic Machines MCQs | Page 4 of 17

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Q31.
Power required to drive a centrifugal pump is directly proportional to __________ of its impeller.

a.

diameter

b.

square of diameter

c.

cube of diameter

d.

fourth power of diameter

Discuss
Answer: (d).fourth power of diameter
Q32.
The mechanical efficiency of an impulse turbine is

a.

ratio of the actual power produced by the turbine to the energy actually supplied by the turbine

b.

ratio of the actual work available at the turbine to the energy imparted to the wheel

c.

ratio of the Work done on the wheel to the energy of the jet

d.

none of the above

Discuss
Answer: (b).ratio of the actual work available at the turbine to the energy imparted to the wheel
Q33.
The overshot water wheels are those in which the wheel runs entirely by the __________ of water.

a.

weight

b.

impulse

c.

Can't say

d.

None of these

Discuss
Answer: (a).weight
Q34.
In a Kaplan turbine runner, the number of blades are generally between

a.

2 to 4

b.

4 to 8

c.

8 to l6

d.

16 to 24

Discuss
Answer: (b).4 to 8
Q35.
If Hg is the gross or total head and hf is the head lost due to friction, then net or effective head (H) is given by

a.

H = Hg/hf

b.

H = Hg x hf

c.

H = Hg + hf

d.

H = Hg - hf

Discuss
Answer: (d).H = Hg - hf
Q36.
The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

a.

normal speed

b.

unit speed

c.

specific speed

d.

none of these

Discuss
Answer: (c).specific speed
Q37.
For centrifugal pump impeller, the maximum value of the vane exit angle is

a.

10° to 15°

b.

15° to 20°

c.

20° to 25°

d.

25° to 30°

Discuss
Answer: (c).20° to 25°
Q38.
In a reaction turbine, the pressure head of water, while flowing over the vanes, is converted into kinetic head before leaving the wheel.

a.

Agree

b.

Disagree

c.

Can't say

d.

None of these

Discuss
Answer: (b).Disagree
Q39.
Manometric head, in case of a centrifugal pump, is equal to

a.

Suction lift + Loss of head in suction pipe due to friction + Delivery lift + Loss of head in delivery pipe due to friction + Velocity head in the delivery pipe

b.

Workdone per kN of water - Losses within the impeller

c.

Energy per kN at outlet of impeller - Energy per kN at inlet of impeller

d.

all of the above

Discuss
Answer: (d).all of the above
Q40.
The force exerted by a jet of water (in a direction normal to flow) impinging on a fixed plate inclined at an angle θ with the jet is

a.

(waV/2g) × sin θ

b.

(waV/g) × sin θ

c.

(waV²/2g) × sin 2θ

d.

(waV²/g) × sin θ

Discuss
Answer: (c).(waV²/2g) × sin 2θ
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