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Mechanical Engineering Exam  >  Mechanical Engineering Test  >  Fluid Mechanics  >  Test: Fluid Machines - 1 - Mechanical Engineering MCQ

Fluid Machines - 1 - Free MCQ Practice Test with solutions, GATE ME Mechanics


MCQ Practice Test & Solutions: Test: Fluid Machines - 1 (10 Questions)

You can prepare effectively for Mechanical Engineering Fluid Mechanics for Mechanical Engineering with this dedicated MCQ Practice Test (available with solutions) on the important topic of "Test: Fluid Machines - 1". These 10 questions have been designed by the experts with the latest curriculum of Mechanical Engineering 2026, to help you master the concept.

Test Highlights:

  • - Format: Multiple Choice Questions (MCQ)
  • - Duration: 30 minutes
  • - Number of Questions: 10

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Test: Fluid Machines - 1 - Question 1
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A pump running at 1414 rpm delivers 256 lps of water against a head of 16 m. The pump is of the

Detailed Solution: Question 1


Test: Fluid Machines - 1 - Question 2
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Consider the following statements:
1. Specific speed uniquely determines the type, shape and design of the turbine.
2. Both unit speed ‘n11’ and unit discharge ‘Q11’ are necessary to uniquely determine the type and design of the turbine.
Which of these statements is/are correct in respect of a hydraulic turbine?

Detailed Solution: Question 2

Specific speed is independent of dimension or size of the actual turbine and specific turbine
Further, Ns = 3.13Nu 
Therefore besides unit speed and unit discharge overall efficiency is also required to determine type and design of turbine.

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Test: Fluid Machines - 1 - Question 3
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If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m to

Detailed Solution: Question 3

ND/√H will remain same even when diameter is reduced.

Test: Fluid Machines - 1 - Question 4
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A Francis turbine working at 400 rpm has a unit speed of 50 rpm and develops 500 kW of power. What is the effective head under which this turbine operates?

Detailed Solution: Question 4

Unit speed of the turbine is given by, 

Test: Fluid Machines - 1 - Question 5
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For a hydro-electric project with reaction turbine, the draft tube at the exit from the turbine is

Detailed Solution: Question 5

Draft tube must be air-tight and under all-conditions of its operation its lower end must be submerged below the level of water in the tail race. It has two purposes:
(i) Permits a negative or suction head to be established at the runner exit.
(ii) Converts a large portion of velocity energy rejected from the runner into useful pressure energy.

Test: Fluid Machines - 1 - Question 6
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In case of semi-circular vanes, thb theoretical maximum efficiency of the wheel can be

Detailed Solution: Question 6


For θ = 0°, the curved vanes will become semicircular and ηmax = 1 or 100%.

Test: Fluid Machines - 1 - Question 7
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Two geometrically similar pumps are running at the same speed of 100 rpm and lifting water against the heads of 25 m and 16 m respectively. First pump is having an impeller diameter of 300 mm. The impeller diameter of second pump shall be

Detailed Solution: Question 7

Equating head coefficients, we get,

Test: Fluid Machines - 1 - Question 8
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Which one of the following statements is correct?

Detailed Solution: Question 8


If coefficient of discharge is more than one, negative slip would occur.

Test: Fluid Machines - 1 - Question 9
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The specific speed of a turbine under a head of 150 m to develop 2000 HP while running at 300 rpm is

Detailed Solution: Question 9

Test: Fluid Machines - 1 - Question 10
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A pelton wheel operates at 630 rpm taking 3 m3/s of water under a head of 256 m with a speed ratio of 0.48 (Given = 4.43) What is the diameter of the impeller?

Detailed Solution: Question 10


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About this Mechanical Engineering Practice Test

This test contains 10 MCQs on Fluid Machines - 1 with detailed solutions for each question. It is part of the Fluid Mechanics for Mechanical Engineering course on EduRev, designed to align with the current Mechanical Engineering syllabus. Each solution explains not just the correct answer but also gives you an understanding of the topic — not just to attempt the question but also help you prepare for the exam with practice.

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