Q.1
A point on a link connecting double slider crank chain traces a
Q.2
The Whitworth quick return motion mechanism is formed in a slider crank chain when the
Q.3
The arrangement is called bevel gearing, when two __________ are connected by gears.
Q.4
Inertia force acts
Q.5
The total number of instantaneous centers for a mechanism consisting of n links are
Q.6
The rotating shafts tend to vibrate violently at whirling speeds because
Q.7
In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
Q.8
The efficiency of a screw jack is maximum, when (where α = Helix angle, and φ = Angle of friction)
Q.9
The advantage of the piston valve over the slide valve is that in the former case
Q.10
Which of the following is false statement in respect of differences between machine and structure?
Q.11
The approximate straight line mechanism is a
Q.12
When two links are connected by a pin joint, their instantaneous center lies
Q.13
When a slider moves on a fixed link having curved surface, their instantaneous centre lies
Q.14
The magnitude of velocities of the points on a rigid link is
Q.15
When the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
Q.16
The maximum fluctuation of speed is the
Q.17
The ratio of maximum fluctuation of speed to the mean speed is called
Q.18
Klein's construction can be used to determine acceleration of various parts when the crank is at
Q.19
Instantaneous center of rotation of a link in a four bar mechanism lies on
Q.20
The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be
Q.21
When the two elements of a pair have a surface contact when relative motion takes place and the surface of one element slides over the surface of the other, the pair formed is known as a
Q.22
The ratio of the number of teeth to the pitch circle diameter in millimeters, is called
Q.23
Which of the following mechanism is an approximate straight line motion mechanism?
Q.24
The behaviour of gases can be fully determined by
Q.25
An engine operates between temperatures of 900°Kandr2 and another engine between T2 and 400°K For both to do equal work, value of T2 will be
Q.26
A watt's governor can work satisfactorily at speeds from
Q.27
The mechanism forms a structure, when the number of degrees of freedom (n) is equal to
Q.28
The centre of gravity of a coupler link in a four bar mechanism will experience
Q.29
The magnitude of linear velocity of a point B on a link AB relative to point A is, (Where ω = Angular velocity of the link AB)
Q.30
Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
Q.31
A machine mounted on a single coil spring has a period of free vibration of tp . If the spring is cut into four equal parts and placed in parallel and the machine is mounted on them, then the period of free vibration of the new system will become
Q.32
Two systems shall be dynamically equivalent when
Q.33
The Coriolis component of acceleration depends upon
Q.34
When a shaking force is transmitted through the springs, damping becomes detrimental when the ratio of its frequency to the natural frequency is greater than
Q.35
With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by
Q.36
A body in motion will be subjected to Coriolis acceleration when that body is
Q.37
When the particles of a body moves perpendicular to its axis, then the body is said to have
Q.38
When there is a reduction in amplitude over every cycle of vibration, then the body is said to have
Q.39
A cam with a roller follower would constitute following type of pair
Q.40
Rectangular bar in a rectangular hole is the following type of pair
Q.41
Shaft revolving in a bearing is the following type of pair
Q.42
Under logarithmic decrement, the amplitude of successive vibrations are
Q.43
At the nodal point in a shaft, the amplitude for torsional vibration will be
Q.44
In a multiple V-belt drive, if one of the belts is broken, then we should replace
Q.45
The displacement of the reciprocating roller follower, when it has contact with the straight flanks of the tangent cam, is given by (where r₁ = Minimum radius of the cam, r₂ = Radius of the roller follower, and θ = Angle turned by the cam from the beginning of the follower displacement)
Q.46
A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by
Q.47
The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is
Q.48
According to Kennedy's theorem, if three bodies have plane motions, their instantaneous centers lie on
Q.49
The amplitude of vibration is always __________ the radius of the circle.
Q.50
The Bifilar suspension method is used to determine
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