Test: Flywheel & Governor - 1

# Test: Flywheel & Governor - 1

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## 20 Questions MCQ Test GATE Mechanical (ME) 2023 Mock Test Series | Test: Flywheel & Governor - 1

Test: Flywheel & Governor - 1 for Mechanical Engineering 2022 is part of GATE Mechanical (ME) 2023 Mock Test Series preparation. The Test: Flywheel & Governor - 1 questions and answers have been prepared according to the Mechanical Engineering exam syllabus.The Test: Flywheel & Governor - 1 MCQs are made for Mechanical Engineering 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Flywheel & Governor - 1 below.
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Test: Flywheel & Governor - 1 - Question 1

### The ratio of maximum fluctuation of speed to the mean speed is called

Detailed Solution for Test: Flywheel & Governor - 1 - Question 1

The co-efficient of fluctuation of speed is the ratio of maximum fluctuation of speed to the mean speed.

Test: Flywheel & Governor - 1 - Question 2

### For a governor running at constant speed, what is the value of the force acting on the sleeve?

Test: Flywheel & Governor - 1 - Question 3

### If Cf is the coefficient of speed fluctuation of a fly wheel then the ratio of  will be

Detailed Solution for Test: Flywheel & Governor - 1 - Question 3

Test: Flywheel & Governor - 1 - Question 4

Given that m = mass of the ball of the governor,
ω = angular velocity of the governor and g = acceleration due to gravity,

The height of Watt's governor is given by

Test: Flywheel & Governor - 1 - Question 5

For a certain engine having an average speed of 1200 rpm, a flywheel approximated as a solid disc, is required for keeping the fluctuation of speed within 2% about the average speed. The fluctuation of kinetic energy per cycle is found to be 2 kJ. What is the least possible mass of the flywheel if its diameter is not to exceed 1m?

Detailed Solution for Test: Flywheel & Governor - 1 - Question 5

Test: Flywheel & Governor - 1 - Question 6

The speed of an engine varies from 210 rad/s to 190 rad/s. During the cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in kg/m2 is

Test: Flywheel & Governor - 1 - Question 7

The speed of an engine varies from 210 rad/s to 190 rad/s. During a cycle the change in kinetic energy is found to be 400 Nm. The inertia of the flywheel in kgm2 is

Test: Flywheel & Governor - 1 - Question 8

Consider the following speed governors:

1. Porter governor
2. Hartnell governor
3. Watt governor
4. Proell Governor

The correct sequence of development of these governors is

Detailed Solution for Test: Flywheel & Governor - 1 - Question 8

Watt,  Porter,  Proell, Hartnell.

Test: Flywheel & Governor - 1 - Question 9

A fly wheel of moment of inertia 9.8 kgm2 fluctuates by 30 rpm for a fluctuation in energy of 1936 Joules. The mean speed of the flywheel is (in rpm)

Test: Flywheel & Governor - 1 - Question 10

Consider the given figure:

Assertion (A): In order to have the same equilibrium speed for the given values of w, W and h, the masses of balls used in the Proell governor are less than those of balls used in the Porter governor.
Reason (R): The ball is fixed to an extension link in Proell governor.

Test: Flywheel & Governor - 1 - Question 11

Consider the following statements:

1. Flywheel and governor of an engine are the examples of an open loop control system
2. Governor is the example of closed loop control system
3. The thermostat of a refrigerator and relief valve of a boiler are the examples of closed loop control system

Which of these statements is/are correct?

Test: Flywheel & Governor - 1 - Question 12

In a Hartnell governor, the mass of each ball is 2.5 kg. Maximum and minimum speeds of rotation are 10 rad/s and 8 rad/s respectively. Maximum and minimum radii of rotation are 20 cm and 14 cm respectively. The lengths of horizontal and vertical arms of bell crank levers are 10 cm and 20 cm respectively. Neglecting obliquity and gravitational effects, the lift of the sleeve is

Test: Flywheel & Governor - 1 - Question 13

Which one of the following engines will have heavier flywheel than the remaining ones?

Detailed Solution for Test: Flywheel & Governor - 1 - Question 13

The four stroke engine running at lower speed needs heavier fly wheel.

Test: Flywheel & Governor - 1 - Question 14

For a given fractional change of speed, if the displacement of the sleeve is high, then the governor is said to be

Test: Flywheel & Governor - 1 - Question 15

A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CEand CS respectively. The kinetic energy of the flywheel is given by

Test: Flywheel & Governor - 1 - Question 16

Which one of the following governors is used to drive a gramophone?

Test: Flywheel & Governor - 1 - Question 17

A rotating shaft carries a flywheel which overhangs on the bearing as a cantilever. If this flywheel weight is reduced to half of its original weight, the whirling speed will

Detailed Solution for Test: Flywheel & Governor - 1 - Question 17

Test: Flywheel & Governor - 1 - Question 18

Which one of the following expresses the sensitiveness of a governor?

(Where N1 = Maximum equilibrium speed, N2 = Minimum equilibrium speed)

Test: Flywheel & Governor - 1 - Question 19

Assertion (A): In designing the size of the flywheel, the weight of the arms and the boss are neglected.
Reason (R): The flywheel absorbs energy during those periods when the turning moment is greater than the resisting moment.

Test: Flywheel & Governor - 1 - Question 20

Sensitiveness of a governor is defined as

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## GATE Mechanical (ME) 2023 Mock Test Series

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