Q.1
The lower pairs are _________ pairs.
Q.2
In a coupling rod of a locomotive, each of the four pairs is a ________ pair.
Q.3
A kinematic chain is known as a mechanism when
Q.4
A body having moment of inertia o:m2 is rotating at 210 RPM and r with another body at rest having I 40 kg m2. The resultant speed after ing will be
Q.5
A pantograph is a mechanism with
Q.6
When one of the links of a kinematic chain is fixed, the chain is known as a
Q.7
The example of completely constrained motion is a
Q.8
The example of successfully constrained motion is a
Q.9
Klein's construction can be used when
Q.10
For the same lift and same angle of ascent, a smaller base circle will give
Q.11
Klein's construction gives a graphic construction for
Q.12
In vibration isolation system, the transmissibility will be equal to unity, for all values of damping factor, if ω/ωn is
Q.13
For simple harmonic motion of the of follower, a cosine curve represents
Q.14
The locus of a point on a thread unwound from a cylinder will be
Q.15
For an involute gear, the ratio of base circle radius and pitch circle radius is equal to
Q.16
The frictional torque transmitted in a flat pivot bearing, assuming uniform wear, is
(Where μ = Coefficient of friction, W=Load over the bearing, R=Radius of bearing)
Q.17
In a reciprocating steam engine, which of the following forms a kinematic link?
Q.18
The Coriolis component of acceleration acts
Q.19
In a four bar chain or quadric cycle chain
Q.20
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
Q.21
In a shaper mechanism, the Coriolis component of acceleration will
Q.22
The instantaneous center of a rigid thin disc rolling on a plane rigid surface is located at
Q.23
The maximum efficiency of spiral gears is (where θ = Shaft angle, and φ = Friction angle)
Q.24
The dedendum circle diameter is equal to (where, φ = Pressure angle)
Q.25
Which of the following statements regarding laws governing the friction between dry surfaces are correct?
Q.26
In a rigid link OA, velocity of 'A' w.r.t. 'O' will be
Q.27
When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.
Q.28
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)
Q.29
Effort of a governor is the
Q.30
Power of a governor is the
Q.31
A rotary internal combustion engine has __________ cylinders.
Q.32
A mechanism consisting of four links is called a __________ mechanism.
Q.33
A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to
Q.34
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
Q.35
The lead screw of a lathe with nut forms a
Q.36
The C.G. of a link in any mechanism would experience
Q.37
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
Q.38
Bifilar suspension method is used to find the
Q.39
Scotch yoke mechanism is used to generate
Q.40
V-belts are usually used for
Q.41
A body is said to be under forced vibrations, when
Q.42
Lower pairs are those which have
Q.43
Open pairs are those which have
Q.44
When the two elements of a pair have __________ when in motion, it is said to a lower pair.
Q.45
The direction of linear velocity of any point on a link with respect to another point on the same link is
Q.46
The frequency of oscillation at compared to earth will be
Q.47
When brakes are applied to all the four wheels of a moving car, the distance traveled by the car before it is brought to rest, will be
Q.48
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will
Q.49
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, this method will
Q.50
Higher pairs are those which have
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