Theory Of Machine MCQ Questions & Answers

11

A point B on a rigid link AB moves with respect to A with angular velocity $$\omega $$ rad/s. The total acceleration of B with respect to A will be equal to

A) Vector sum of radial component and Coriolis component B) Vector sum of tangential component and Coriolis component C) Vector sum of radial component and tangential component D) Vector difference of radial component and tangential component

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Answer & Solution

Answer: Option C

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12

A shaft has an attached disc at the centre of its length. The disc has its centre of gravity located at a distance of 2 mm from the axis of the shaft. When the shaft is allowed to vibrate in its natural bow-shaped mode, it has a frequency of vibration of 10 rad/s. When the shaft is rotated at 300 r.p.m., it will whirl with a radius of

A) 2 mm B) 2.22 mm C) 2.50 mm D) 3.0 mm

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Answer & Solution

Answer: Option B

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13

The lead screw of a lathe with nut forms a

A) Rolling pair B) Sliding pair C) Screw pair D) Turning pair

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Answer & Solution

Answer: Option C

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14

The C.G. of a link in any mechanism would experience

A) No acceleration B) Linear acceleration C) Angular acceleration D) Both angular and linear accelerations

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Answer & Solution

Answer: Option D

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15

There are six gears A, B, C, D, E and F in a compound train. The numbers of teeth in the gears are 20, 60, 30, 80, 25 and 75 respectively. The ratio of angular speeds of the driven (F) to the driver (A) of the drive is

A) $$\frac{1}{{24}}$$ B) $$\frac{1}{8}$$ C) $$\frac{4}{{15}}$$ D) 12

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Answer & Solution

Answer: Option A

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16

For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a
Theory of Machine mcq question image

A) 30° V-engine B) 60° V-engine C) 120° V-engine D) 150° V-engine

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Answer & Solution

Answer: Option A

Solution:

17

In a rigid link OA, velocity of 'A' w.r.t. 'O' will be

A) Parallel to OA B) Perpendicular to OA C) At 45° to OA D) Along AO

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Answer & Solution

Answer: Option B

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18

When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.

A) Same B) Opposite C) Perpendicular D) None of these

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Answer & Solution

Answer: Option B

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19

A rotary internal combustion engine has __________ cylinders.

A) Four B) Five C) Six D) Seven

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Answer & Solution

Answer: Option D

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20

A mechanism consisting of four links is called a __________ mechanism.

A) Simple B) Compound C) Binary D) None of these

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Answer & Solution

Answer: Option A

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Theory Of Machine MCQ Questions & Answers | Mechanical Engineering