Online Mechanical Engineering Test - Theory of Machines Test 2



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Instruction:

  • This is a FREE online test. DO NOT pay money to anyone to attend this test.
  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).


1.

In a coupling rod of a locomotive, each of the four pairs is a __________ pair.

A.
sliding
B.
turning
C.
rolling
D.
screw

Your Answer: Option (Not Answered)

Correct Answer: Option B

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2.

The factor which affects the critical speed of a shaft is

A.
diameter of disc
B.
span of shaft
C.
eccentricity
D.
all of these

Your Answer: Option (Not Answered)

Correct Answer: Option D

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3.

The primary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

A.
0° and 90°
B.
0° and 180°
C.
90° and 180°
D.
180° and 360°

Your Answer: Option (Not Answered)

Correct Answer: Option B

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4.

Which of the following is a higher pair?

A.
Belt and pulley
B.
Turning pair
C.
Screw pair
D.
Sliding pair

Your Answer: Option (Not Answered)

Correct Answer: Option A

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5.

The distance between the centre of suspension and centre of percussion is equal to the equivalent length of a simple pendulum.

A.
Agree
B.
Disagree

Your Answer: Option (Not Answered)

Correct Answer: Option A

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6.

The unbalanced primary forces in a reciprocating engine are

A.
balanced completely
B.
balanced partially
C.
balanced by secondary forces
D.
not balanced

Your Answer: Option (Not Answered)

Correct Answer: Option B

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7.

When a point at the end of a link moves with constant angular velocity, its acceleration will have

A.
radial component only
B.
tangential component only
C.
coriolis component only
D.
radial and tangential components both

Your Answer: Option (Not Answered)

Correct Answer: Option A

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8.

A watt's governor can work satisfactorily at speeds from

A.
60 to 80 r.p.m.
B.
80 to 100 r.p.m.
C.
100 to 200 r.p.m.
D.
200 to 300 r.p.m.

Your Answer: Option (Not Answered)

Correct Answer: Option A

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9.

A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)

A.
P = W tan α
B.
P = W tan (α + φ)
C.
P = W (sin α + μ cos α)
D.
P = W (cos α + μ sin α)

Your Answer: Option (Not Answered)

Correct Answer: Option C

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10.

The lower pairs are __________ pairs.

A.
self-closed
B.
force-closed

Your Answer: Option (Not Answered)

Correct Answer: Option A

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11.

The frictional torque transmitted by a disc or plate clutch is same as that of

A.
flat pivot bearing
B.
flat collar bearing
C.
conical pivot bearing
D.
truncated conical pivot bearing

Your Answer: Option (Not Answered)

Correct Answer: Option B

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12.

The maximum gyroscopic couple acting on the ship tends to shear the holding down bolts.

A.
Correct
B.
Incorrect

Your Answer: Option (Not Answered)

Correct Answer: Option A

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13.

For the isochronous Porter governor, the controlling force curve is a straight line passing through the origin.

A.
Correct
B.
Incorrect

Your Answer: Option (Not Answered)

Correct Answer: Option A

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14.

When no external force acts on a body, after giving it an initial displacement, the body is said to have free vibrations.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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15.

A shaft of mass (mc)and stiffness (s) is fixed at one end and carries a mass (m) at the other end. The natural frequency of its transverse vibration is same as for longitudinal vibration.

A.
Yes
B.
No

Your Answer: Option (Not Answered)

Correct Answer: Option B

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16.

A sliding pair has a completely constrained motion.

A.
Yes
B.
No

Your Answer: Option (Not Answered)

Correct Answer: Option A

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17.

When the connection between the elements forming a pair is such that the constrained motion is not completed by itself, but by some other means, the motion is said to be a completely constrained motion,

A.
Yes
B.
No

Your Answer: Option (Not Answered)

Correct Answer: Option B

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18.

A pair is said to be a kinematic pair, if the relative motion between them is completely or successfully constrained.

A.
Correct
B.
Incorrect

Your Answer: Option (Not Answered)

Correct Answer: Option A

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19.

When a point moves along a straight line, its acceleration will have

A.
radial component only
B.
tangential component only
C.
coriolis component only
D.
radial and tangential components both

Your Answer: Option (Not Answered)

Correct Answer: Option B

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20.

The frictional torque transmitted in a flat collar bearing, considering uniform pressure, is (where r1 and r2 = External and internal radii of collar respectively)

A.
μ W (r1 + r2)
B.
μ W (r1 + r2)
C.
D.

Your Answer: Option (Not Answered)

Correct Answer: Option D

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