Theory of Machine - Mechanical Engineering Questions and Answers

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The distance moved by the valve from one end to the other end is called valve travel.

True

False

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The Klein's method of construction for reciprocating engine mechanism

is a simplified version of instantaneous centre method

utilises a quadrilateral similar to the diagram of mechanism for reciprocating engine

enables determination of coriolis component

is based on the acceleration diagram

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A Watt's governor is a spring loaded governor.

Yes

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The velocity of the rubbing surface __________ with the distance from the axis of the bearing.

increases

decreases

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The brake commonly used in railway trains is

shoe brake

band brake

band and block brake

internal expanding brake

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The face of the tooth is the

surface of the top of tooth

surface of tooth above the pitch surface

width of tooth below the pitch surface

width of tooth measured along the pitch circle

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A Hartnell governor has its controlling force (F_c) given by F_c = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

a is + ve and b = 0

a = 0 and b is + ve

a is + ve and b is - ve

a is + ve and b is also + ve

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The acceleration of the particle moving with simple harmonic motion is __________ at the mean position.

zero

minimum

maximum

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In a differential band brake as shown in the below figure, if the length OB is greater than OA, then the force P at C should act in the downward direction.

Yes