Related Questions
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4
If there are L number of links in a mechanism, then number of possible inversions is equal to
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4
Pulley in a belt drive acts as
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4
The load cup of a screw jack is made separate from the head of the spindle to
A. Enhance the load carrying capacity of the jack
B. Reduce the effort needed for lifting the working load
C. Reduce the value of frictional torque required to be countered for lifting the load
D. Prevent the rotation of load being lifted
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4
In a simple train of wheels, the velocity ratio __________ the intermediate wheels.
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4
The velocity of a body moving with simple harmonic motion is __________ at the mean position.
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4
Which of the following is an example of a higher pair?
C. Ball and roller bearing
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4
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is
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4
When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a
C. Meyer's expansion valve
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4
In a Hartnell governor, the compression of the spring is __________ the lift of the sleeve.
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4
The essential condition of placing the two masses, so that the system becomes dynamically equivalent, is (where l₁ and l₂ = Distance of two masses from the centre of gravity of the body, and kG = Radius of gyration of the body)
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4
The example of spherical pair is
D. Ball bearing and roller bearing
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4
Whitworth quick return mechanism is obtained by inversion of
A. Slider crank mechanism
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If ω/ωn is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
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4
Which of the following is a higher pair?
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4
The number of centers in a crank driven slider crank mechanism is
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4
The example of lower pair is
A. Shaft revolving in a bearing
B. Straight line motion mechanisms
C. Automobile steering gear
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4
The absolute acceleration of any point P in a link about center of rotation O is
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4
The approximate straight line mechanism is a
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4
In Meyer's expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
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4
A fixed gear having 200 teeth is in mesh with another gear having 50 teeth. The two gears are connected by an arm. The number of turns made by the smaller gear for one revolution of arm about the centre of bigger gear is
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4
The Whitworth quick return motion mechanism is formed in a slider crank chain when the
B. Longest link is a fixed link
C. Slider is a fixed link
D. Smallest link is a fixed link
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4
When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be
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4
If the pressure angle is __________, a reciprocating follower will jam in its bearings.
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4
Coriolis component is encountered in
A. Quick return mechanism of shaper
B. Four bar chain mechanism
C. Slider crank mechanism
D. Both (A) and (C) above
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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
When the sleeve of a Porter governor moves upwards, the governor speed
D. First increases and then decreases
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4
Which of the following disciplines provides study of inertia forces arising from the combined effect of the mass and the motion of the parts?
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4
When the pitching of a ship is __________ the effect of gyroscopic couple acting on it will be to move the ship towards port side.
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4
The tractive force in a locomotive with two cylinders is given by (where c = Fraction of reciprocating parts per cylinder, m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, and θ = Angle of inclination of crank to the line of stroke)
C. (1 - c).m.ω².r (cosθ - sinθ)
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For dynamic balancing of a shaft
A. The net dynamic force acting on the shaft is equal to zero
B. The net couple due to the dynamic forces acting on the shaft is equal to zero