Test: Flywheels - 1 | 10 Questions MCQ Test

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This mock test of Test: Flywheels - 1 for Mechanical Engineering helps you for every Mechanical Engineering entrance exam. This contains 10 Multiple Choice Questions for Mechanical Engineering Test: Flywheels - 1 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Flywheels - 1 quiz give you a good mix of easy questions and tough questions. Mechanical Engineering students definitely take this Test: Flywheels - 1 exercise for a better result in the exam. You can find other Test: Flywheels - 1 extra questions, long questions & short questions for Mechanical Engineering on EduRev as well by searching above.

QUESTION: 1

Which one is a correct statement regarding flywheel?

A.
The flywheel reduces the fluctuation of speed during a cycle for constant output load.
B.
The flywheel controls the mean speed of the prime mover.
C.
The flywheel adjusts supply when output is varying.
D.
The flywheel is no influence over cyclic speed fluctuations.

Solution:

A flywheel is used to control the speed variations caused by the fluctuations of energy during each each cycle of operation. It acts as a reservoir of energy which stores energy during the period when the supply of energy is more' than the requirement and releases the energy during the period when the supply of energy is less than the requirements.

QUESTION: 2

What is the maximum speed of flywheel of mass 5200 kg and radius of gyration 1.8 m when the fluctuation of energy is 100800 Nm? The mean speed of the engine is 180 rpm

A.
181.5 rpm
B.
180.5 rpm
C.
178.5 rpm
D.
179.5 rpm

Solution:

QUESTION: 3

The maximum fluctuation of energy in a flywheel is equal to

A.
Iω (ω₁ - ω₂)
B.
Iω₂K
C.
2KE
D.
All of these

Solution:

QUESTION: 4

The radius of gyration of a flywheel is 1 m and the fluctuation of speed is not to exceed 1 % of the mean speed of the flywheel. If the mass of the flywheel is 4000 kg and hte engine develops 150 kW at 120 rpm, what is the maximum flucuation of energy?

A.
6210 Nm
B.
6250 Nm
C.
6310 Nm
D.
6430 Nm

Solution:

QUESTION: 5

Select the wrong statement;

A.
The coefficient of fluctuation of speed remains same with any change in the mean speed of the prime mover.
B.
The maximum fluctuation of energy of a flywheel is directly proportional to coefficient of fluctuation of speed.
C.
For the same fluctuation of energy, the size of the flywheel is reduced at higher mean speed of rotation.
D.
For the same mass of flywheel, the rim type and disc type flywheels are equally preferable

Solution:

For the same mass of flywheel, the rim type is preferable over disk type flywheels.

QUESTION: 6

Consider the following parameter;-------1
. Limit of peripheral speed
2. Limit of centrifugal stress
3. Coefficient of fluctuation of speed
4. Weight of the rim

Which of these parameters are used in the calculation of the diameter of flywheel rim?

A.
1,3 and 4
B.
2, 3 and 4
C.
1,2 and 3
D.
1,2 and 4

Solution:

σ = ρv²
σ → a circumferential stress
ρ→ density o f flywheel material
V→ tangential rim velocity

QUESTION: 7

Which of the following machines does not require a flywheel?

A.
Punching machine
B.
Lathe
C.
Revetting machine
D.
Steam engine

Solution:

QUESTION: 8

If N₁ and N₂ are the maximum and minimum equilibrium speeds of the flywheel, then maximum fluctuations of energy of flywheel is proportional to

A.
B.
C.
N₁ + N₂
D.
N₁ - N₂

Solution:

QUESTION: 9

A flywheel influences the

A.
mean speed of the engine .
B.
mean torque developed by the engine
C.
cyclic fluctuations of speed when delivering constant output
D.
variation of load demand on the engine

Solution:

QUESTION: 10

Identity the wrong statement:

A.
Turning-moment-diagram is graphical representation of turning moment or crank effort for various positions of the crank.
B.
The area of turning -moment-diagram represents the work done.
C.
The variation of energy above and below the mean resisting torque line is called fluctuation of energy.
D.
The coefficient of fluctuation of energy is defined as the ratio of work done per cycle to the maximum fluctuation of energy.