Q.1
The example of lower pair is
Q.2
Which of the following is an example of sliding pair?
Q.3
In a kinematic chain, a quaternary joint is equivalent to
Q.4
The direction of Coriolis component of acceleration is the direction
Q.5
A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when
Q.6
Efficiency of a screw jack is given by
Q.7
A chain comprises of 5 links having 5 joints. Is it kinematic chain?
Q.8
A universal joint is an example of
Q.9
An automobile steering gear is an example of
Q.10
The cam and follower is an example of
Q.11
The motion of a shaft in a circular hole is an example of
Q.12
Which of the following is an open pair?
Q.13
The Coriolis component of acceleration is taken into account for
Q.14
Critical damping is a function of
Q.15
Which of the following is a lower pair?
Q.16
The D-slide valve is also known as
Q.17
A circular bar moving in a round hole is an example of
Q.18
The axis of precession is __________ to the plane in which the axis of spin is going to rotate.
Q.19
In a Hartnell governor, if a spring of greater stiffness is used, then the governor will be
Q.20
When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be
Q.21
Governor is used in automobile to
Q.22
If the pressure angle is __________, a reciprocating follower will jam in its bearings.
Q.23
In a circular arc cam with roller follower, the acceleration in any position of the lift will depend only upon
Q.24
The critical speed of a shaft depends upon its
Q.25
The Klein's method of construction for reciprocating engine mechanism
Q.26
The driving and driven shafts connected by a Hooke's joint will have equal speeds, if
Q.27
A cam mechanism imparts following motion
Q.28
A foot step bearing and rotor of a vertical turbine form examples of
Q.29
A friction circle is a circle drawn when a journal rotates in a bearing. Its radius depends upon the coefficient of friction and the
Q.30
Which of the following mechanism is obtained from lower pair?
Q.31
Ackermann steering gear consists of
Q.32
Davis steering gear consists of
Q.33
The acceleration of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by
Q.34
The velocity of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by
Q.35
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 the equation are __________ then the system will be under damped.
Q.36
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 the equation are __________ then the system will be under damped.
Q.37
The frictional torque transmitted in a flat pivot bearing, considering uniform wear, is (where μ = Coefficient of friction, W = Load over the bearing, and R = Radius of bearing surface)
Q.38
When a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
Q.39
The type of coupling used to join two shafts whose axes are neither in same straight line nor parallel, but intersect is
Q.40
Which type of gear train is used in clock mechanism to join hour hand and minute hand?
Q.41
A rotor which is balanced statically but not dynamically is supported on two bearings L apart and at high speed of the rotor, reaction on the left bearing is R. The right side of the bearing is shifted to a new position 2L apart from the left bearing. At the same rotor speed, dynamic reaction on the left bearing in the new arrangement will
Q.42
The relation l = (2/3).(j + 2) apply only to kinematic chains in which lower pairs are used. This may be used to kinematic chains in which higher pairs are used, but each higher pair may be taken as equivalent to
Q.43
A circle passing through the pitch point with its center at the center of cam axis is known as
Q.44
Cylindrical cams can be classified as
Q.45
A ball and a socket forms a
Q.46
In a gear having involute teeth, the normal to the involute is a tangent to the
Q.47
A mechanism is an assemblage of
Q.48
Which of the following statement is correct as regard to the difference between a machine and a structure?
Q.49
In a four-bar chain it is required to give an oscillatory motion to the follower for a continuous rotation of the crank. For the lengths of 50 mm of crank and 70 mm of the follower, determine theoretical maximum length of coupler. The distance between fixed pivots of crank and followers is
Q.50
In considering friction of a V-thread, the virtual coefficient of friction (μ₁) is given by
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