Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

IKING 2 > M1 > Flashcards

M1 Flashcards

1
Q

The first derivative of kinetic energy with
respect to velocity is:
A. Acceleration C. Power
B. Momentum D. None of these

A

b

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Cast iron flywheels are commonly designed with factor of
safety of ______. (ME BD, AUG. 2017)
A. 10 to 13 C. 10 to 14
B. 10 to 12 D. 8 to 13

A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

In designing the spoke or wheel arm of a flywheel it is ideal
to consider that the cross-sectional area of the spoke at rim
side should not be less than ____ of the cross area at the
hub side. (ME BD, AUG. 2017)
A. 80% C. 90%
B. 2/3 D. 3/8

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

For equalizing energy absorption and exertions in
mechanical work, this part of the machine prevents
excessive change of speed or to regulate work speed.
(ME BD., APR. 2006)
A. Actuator C. Flywheel
B. Bearing D. Shaft

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

A rule of thumb, the speed limit of the flywheel rim speed
should be 6,000 fpm for cast iron material and for cast iron
flywheel rim at ______ meters per minute. (ME BD. OCT.
1997)
A. 3,050 C. 7,000
B. 4,500 D. 10,000

A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

(ME BD EXAM) What is the recommended coefficient of
fluctuation of flywheels for punching, shearing, pressing
machine?
A. 0.005-0.1
B. 0.007-0.01
C. 0.03-0.05
D. 0.01-0.03

A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

From experience, specify the conventional limit of flywheel
operation to be at 6,000 fpm for cast iron and _________
fpm for cast steel. (ME BD, APR. 1998)
A. 7,000 C. 10,000
B. 8,000 D. 12,000

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Cast iron flywheels are commonly designed with a factor of
safety of ______. (ME BD. APR. 2000/1997)
A. 5 to 6 C. 10 to 13
B. 8 to 10 D. 12 to 14

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Absorb and equalize energy in case the resistance to
motion varies, or used to equalize the energy exerted and
the work done. (ME BD., OCT. 2000)
A. Balance wheel C. flywheel pulleys
B. Flywheel D. All of the above

A

D

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

. If the load on the engine is constant, the mean speed will
be constant from the cycle, then ________.
A. The governor will not operate but flywheel will be
acting
B. The flywheel will be acting but governor will not
operate
C. Both flywheel and governor will be acting
D. Both flywheel and governor will not be acting

A

A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the reciprocal of the coefficient of fluctuation of
speed?
A. Fluctuation of speed
B. Coefficient of steadiness
C. Maximum fluctuation of speed
D. None of the above

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Split flywheel is made to ________.
A. Minimize large centrifugal forces
B. Reduce weight of the above
C. Avoid cooling stresses
D. All of the above

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the difference between the maximum and
minimum speeds during a cycle?
A. Fluctuation of speed
B. Maximum fluctuation of speed
C. Coefficient of fluctuation of speed
D. None of the above

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

In flywheel design, if W equals the width of the arm at the
hub (length of major axis) and D equals the shaft diameter,
then W equals 1.3D for a wheel having 6 arms; and for an
8-arm wheel W equals ______.
A. 1.2D C. 1.4D
B. 1.3D D. 1.5D

A

C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Which of the following stresses acts on the spokes of the
flywheelvi?
A. Direct shear stress C. Torsional shear stress
B. Tensile stress D. Compressive stress

A

B

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the ratio of maximum fluctuation of speed to
the mean speed?
A. Fluctuation of speed
B. Maximum fluctuation of speed
C. Coefficient of fluctuation of speed
D. None of the above

A

C

17
Q

A solid flywheel is rotating about its own axis, the direction
of its angular momentum is:
A. Along the axis of rotation
B. Along the tangent to direction of both position vector
and velocity vector
C. Perpendicular to the direction of angular velocity
D. Radial

A

B

18
Q

. Flywheel arms are usually of ________ cross-section.
A. Circular C. Rectangular
B. Elliptical D. Squared

A

B

19
Q

What is/are the material/s composition of flywheels?
A. Cast Iron C. High strength steel
B. Ceramics D. All of the above

A

D

20
Q

What is the form of energy stored in a flywheel?
A. Heat energy C. Solar energy
B. Kinetic energy D. Potential energy

A

B

21
Q

Cast-iron wheels having solid rims burst at this rim speed
(ft/sec) corresponding to a centrifugal tension of about
15,600 psi.
A. 230 C. 325
B. 275 D. 395

A

D

22
Q

. In automobiles, flywheel is placed in between ____.
A. Engine and clutch
B. Clutch and propeller shaft
C. Propeller shaft and differential Gear
D. None of the above

A

A

23
Q

The amount of energy absorbed by a flywheel2
is
determined from the __________.
A. torque-crank angle diagram
B. acceleration-crank angle diagram
C. speed-space diagram
D. speed-energy diagram

A

A

24
Q

Which of the following where the Flywheel is used?
A. Punch press C. Drilling machine
B. Surface grinder D. Milling machine

A

A

25
Q

When the torque required by the machine is more than
the torque supplied by tche motor; the flywheel is:
A. accelerated C. retarded
B. at constant speed d. NONE of the above

A

C

26
Q

The cross-section of the flywheel arm is _________.
A. I section C. rectangular
B. elliptical D. circular

A

B

27
Q

When a flywheel extends into a pit or is within ___ mm of
floor and a standard railing guard is used, a standard toe
board shall also be provided.
A. 200 mm C. 400 mm
B. 300 mm D. 500 mm

A

B

28
Q

Machine flywheels having spokes, or projections, any part
of which is ____ mm or less above floor or working level
shall be guarded.
A. 1,500 mm C. 2,400 mm
B. 2,100 mm D. 2,800 mm

A

B

29
Q

Which of the following stresses acts on the spokes of the
flywheel?
A. Direct shear stress C. Torsional shear stress
B. Tensile stress D. Compressive stress

A

A

30
Q

Which of the following is the following is the
allowable tensile strength of the steel plates?
A. 396.41 N/m2
C. 310.11 N/m2

B. 379.31 N/m2 D. 296.12 N/m2

A

A

31
Q

In case of solid disk flywheel, the mass of disk is given by:
A. πR^2tρ C. (π/2)R^2tρ
B. (π/3)R^2 tρ D. (π/4)R^2tρ

A

A

32
Q

For two stroke engines, the work done/cycle is _____.
A. π𝑇𝑚 C. 2π𝑇𝑚
B. 3π𝑇𝑚 D. 4π𝑇�

A

C

33
Q

For punching metal over 1⁄4-inch thick, geared presses
with speeds ranging from ________ strokes per
minute are commonly employedvii
.
A. 15 to 30 C. 20 to 50
B. 25 to 75 D. 30 to 90

A

D

34
Q

or four stroke engines, the work done/cycle as a
function of mean torque, 𝑇𝑚 is _____.
A. π𝑇𝑚 C. 2π𝑇𝑚
B. 3π𝑇𝑚 D. 4π𝑇�

A

D

35
Q

The mass moment of inertia of a solid circular disk is:
A. mR^2/2 C. mR^2/3
B. 2mR^2/3 D. 4mR^2

A

A

36
Q

What is the coefficient of fluctuation of speed when the
max and min speeds are 300 rpm and 290 rpm?
A. 0.034 C. 0.017
B. 0.008 D. 0.004

A

a

37
Q

For the same mass of flywheel ________.
A. the disc type flywheel is preferable
B. the rim type flywheel is preferable
C. it will depend upon the type of the prime mover
D. any type is equally preferable

A

B

38
Q

The rim of a flywheel is subjected to _______.
A. Direct tensile stress and bending stress
B. Torsional shear stress and bending stress
C. Direct shear stress and bending stress
D. Compressive stress and bending stress

A

A

39
Q

The flywheel is accelerated when _______.
A. Driving torque = Load torque
B. Driving torque < Load torque
C. Driving torque > Load torque
D. None of the above

A

C

IKING 2 (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions