Related Questions
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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
For two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that
A. Governor A is more sensitive than governor B
B. Governor B is more sensitive than governor A
C. Both governors A and B are equally sensitive
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4
The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because
A. Whole of the mechanism in the Ackerman steering gear is on the back of the front wheels
B. The Ackerman steering gear consists of turning pairs
C. The Ackerman steering gear is most economical
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4
When a body is subjected to transverse vibrations, the stress induced in a body will be
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4
Angular acceleration of a link can be determined by dividing the
A. Centripetal component of acceleration with length of link
B. Tangential component of acceleration with length of link
C. Resultant acceleration with length of link
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4
When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)
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4
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
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4
In full depth involute system, the smallest number of teeth in a pinion which meshes with rack without interference is
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4
Bifilar suspension method is used to find the
A. Angular acceleration of the body
B. Moment of inertia of the body
C. Periodic time of the body
D. Frequency of vibration of the body
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4
The velocity of sliding of meshing gear teeth is (Where ω₁ and ω₂ are angular velocities of meshing gears and y is distance between point of contact and the pitch point)
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4
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
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4
The distance by which the __________ of the D-slide valve overlaps the steam port is called exhaust lap.
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4
The motion between a pair which takes place in __________ is known as incompletely constrained motion.
C. More than one direction
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4
Which of the following statement is correct?
A. The periodic time of a particle moving with simple harmonic motion is the time taken by a particle for one complete oscillation.
B. The periodic time of a particle moving with simple harmonic motion is directly proportional to its angular velocity.
C. The velocity of a particle moving with simple harmonic motion is zero at the mean position.
D. The acceleration of the particle moving with simple harmonic motion is maximum at the mean position.
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4
In locomotives, the ratio of the connecting rod length to me crank radius is kept very large in order to
A. Minimise the effect of primary forces
B. Minimise the effect of secondary forces
C. Have perfect balancing
D. To start the locomotive quickly
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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
Governor is used in automobile to
A. Decrease the variation of speed
B. Maximize the fuel economy
C. Limit the vehicle speed
D. Maintain constant engine speed
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4
In a radial cam, the follower moves
A. In a direction perpendicular to the cam axis
B. In a direction parallel to the cam axis
C. In any direction irrespective of the cam axis
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4
A chain comprises of 5 links having 5 joints. Is it kinematic chain?
D. Data are insufficient to determine it
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4
The displacement of a flat faced follower when it has contact with the flank of a circular arc cam, is given by (where R = Radius of flank, r₁ = Minimum radius of the cam, and θ = Angle turned through by the cam)
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4
The lower pair is a
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4
For a kinematic chain to be considered as mechanism
A. Two links should be fixed
B. One link should be fixed
C. None of the links should be fixed
D. There is no such criterion
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4
A kinematic chain is known as a mechanism when
A. None of the links is fixed
B. One of the links is fixed
C. Two of the links are fixed
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4
In a kinematic chain, a quaternary joint is equivalent to
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4
When the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a
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4
Which of the following statements regarding laws governing the friction between dry surfaces are correct?
A. The friction force is dependent on the materials of the contact surfaces.
B. The friction force is directly proportional to the normal force.
C. The friction force is independent of me area of contact.
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4
The frictional torque transmitted in a truncated conical pivot bearing, considering uniform wear, is
A. (1/2). μ W cosec α (r₁ + r₂)
B. (2/3).μ W cosec α (r₁ + r₂)
C. (1/2). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]
D. (2/3). μ W cosec α [(r₁³ - r₂³)/(r₁² - r₂²)]
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4
The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.
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4
The equation of motion for a vibrating system with viscous damping is (d²x/dt²) + (c/m). (dx/dt) + (s/m). x = 0 If the roots of this equation are real, then the system will be
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4
The equivalent length of a simple pendulum which gives the same frequency as a compound pendulum is