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Test: Thermodynamics - 3 - Mechanical Engineering MCQ


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25 Questions MCQ Test - Test: Thermodynamics - 3

Test: Thermodynamics - 3 for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Test: Thermodynamics - 3 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Thermodynamics - 3 MCQs are made for Mechanical Engineering 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Thermodynamics - 3 below.
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Test: Thermodynamics - 3 - Question 1

A notch can be used to measure flow in

Test: Thermodynamics - 3 - Question 2

Which of the following forces are consider in Navier stokes eq.
a. Pressure
b. viscous
c. Turbulence
d. gravity
e. surface Tension

Test: Thermodynamics - 3 - Question 3

For laminar flow between two flat plates the flow varies as

Test: Thermodynamics - 3 - Question 4

A what distance r from center of pipe of radiusR does average velocity occurs in a laminar flow

Test: Thermodynamics - 3 - Question 5

The shear force on a plate of area 1m2 whenlubricating oil of viscosity 9.81 poise. Filled b/wtwo parallel plate 1 cm apart moving with relatedvelocity of 2m/s.

Test: Thermodynamics - 3 - Question 6

Power transmitted through a pipe is given by :-

Q → Discharge
H → Net head Available
hf → Head loss due to friction in pipe

Test: Thermodynamics - 3 - Question 7

If the end of a pipe is suddenly closed which phenomenon would occur.

Test: Thermodynamics - 3 - Question 8

Air is flowing over a flat plate with a free streamvelocity of 24 m/s and its kinematic viscosity is 75 × 10-6 m2/s. It at a particular point reynoldsno. is 24000, the distance of the point from leading edge will be,

Test: Thermodynamics - 3 - Question 9

Which of the following chart is relation betweenfriction factor, reynolds no. and relative roughness

Test: Thermodynamics - 3 - Question 10

For towing of ships in a sea which of the followingmodel law would you use

Test: Thermodynamics - 3 - Question 11

The drag force encountered by a fluid on a bodyimmersed in the fluid is due to

Test: Thermodynamics - 3 - Question 12

When pressure drag is greater than that of frictiondrag the shape of the body is

Test: Thermodynamics - 3 - Question 13

The force on a curved place due to a jet of area 'a' velocity 'v' and angle of deflection 'o' is .

Test: Thermodynamics - 3 - Question 14

Heat transferred at constant pressure _____ the enthalpy of a system.

Detailed Solution for Test: Thermodynamics - 3 - Question 14

At constant pressure, (dQ) = dh where h = u + pv is the specific enthalpy of the system.

Test: Thermodynamics - 3 - Question 15

Torque can be defined as

Test: Thermodynamics - 3 - Question 16

If hm = mechanical efficiency
hh = hydraulic efficiency
hg = generating efficiency
ho = overall efficiency

Which of the following is true: -

Test: Thermodynamics - 3 - Question 17

Degree of reaction of pelton turbine is

Test: Thermodynamics - 3 - Question 18

For pelton turbine with blade angle ( Ø )maximum efficiency when u = v/2 is given by

Test: Thermodynamics - 3 - Question 19

Francis Turbine is a


a. Inward flow
b. outward flow
c. radial
d. Tangential
e. Reaction
f. Impulse

Test: Thermodynamics - 3 - Question 20

It Do = Dia at outlet
Dn = Dia of hub
Vf = Flow velocity
Vw = whrill velocity
V = Absolute velocity Flow through an axial turbine can be given as

Test: Thermodynamics - 3 - Question 21

No. of vanes in a radial turbine and axial turbineare respectively

Test: Thermodynamics - 3 - Question 22

The discharge of double acting Reciprocating pump can be given as

Test: Thermodynamics - 3 - Question 23

The speed ratio of pelton wheel operating undera head of 900 m is 0.45. what is the peripheralvelocity of the turbine wheel.

Test: Thermodynamics - 3 - Question 24

Cavitation in hydraulic machines occurs at
1. Exit of pump
2. Entry of turbine

Which of the statements is correct

Test: Thermodynamics - 3 - Question 25

Consider the following data for the performance of a centrifugal pump.
Speed = 1000 rpm.
flow = 50 liters persecond
head = 20 m
power = 10 kW.

It the speed is increased to 1500 rpm, the powerwill be nearly equal to

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