### Related Questions

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4

# The coriolis component of acceleration exists whenever a point moves along a path that has

C. Gravitational acceleration

D. Tangential acceleration

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4

# The critical speed of a shaft in revolution per second is __________ as that of natural frequency of transverse vibration.

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4

# It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by

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4

# Which of the following has sliding motion?

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4

# In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)

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4

# The balancing of a rigid rotor can be achieved by appropriately placing balancing masses in

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4

# The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by

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4

# To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?

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4

# The danger of breakage and vibration is maximum

A. Below the critical speed

B. Near the critical speed

C. Above the critical speed

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4

# 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

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4

# A reed type tachometer use the principle of

A. Longitudinal vibration

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4

# Which of the following statement is correct for gears?

A. The addendum is less than the dedendum

B. The pitch circle diameter is the product of module and number of teeth

C. The contact ratio means the number of pairs of teeth in contact

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4

# The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)

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4

# When the axes of the first and last wheels are coaxial, then the train is known as

A. Simple train of wheels

B. Compound train of wheels

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4

# If the opposite links of a four bar linkage are equal, the links will always form a

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4

# When there is a reduction in amplitude over every cycle of vibration, then the body is said to have

D. Under damped vibration

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4

# The lower pairs are __________ pairs.

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4

# The Coriolis component of acceleration acts

A. Along the sliding surface

B. Perpendicular to the sliding surface

C. At 45° to the sliding surface

D. Parallel to the sliding surface

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4

# The power of a Porter governor is equal to

A. [c²/(1 + 2c)] (m + M) g.h

B. [2c²/(1 + 2c)] (m + M) g.h

C. [3c²/(1 + 2c)] (m + M) g.h

D. [4c²/(1 + 2c)] (m + M) g.h

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4

# Which of the following mechanisms produces mathematically an exact straight line motion?

C. Peaucellier's mechanism

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4

# The secondary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)

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4

# The included angle for the V-belt is usually

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4

# The swaying couple is maximum or minimum when the angle of inclination of the crank to the line of stroke (θ) is equal to

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4

# The power from the engine to the rear axle of an automobile is transmitted by means of

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4

# In which of the following type of gear train the first gear and the last gear are co-axial.

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4

# Instantaneous center of rotation of a link in a four bar mechanism lies on

A. Right side pivot of this link

B. Left side pivot of this link

C. A point obtained by intersection on extending adjoining links

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4

# The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)

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4

# The unbalanced force due to revolving masses

A. Varies in magnitude but constant in direction

B. Varies in direction but constant in magnitude

C. Varies in magnitude and direction both

D. Constant in magnitude and direction both

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4

# The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be

A. To dip the nose and tail

B. To raise the nose and tail

C. To raise the nose and dip the tail

D. To dip the nose and raise the tail

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4

# The method of direct and reverse cranks is used in engines for

A. The control of speed fluctuations

B. Balancing of forces and couples