Q.1
The secondary unbalanced force is maximum __________ in one revolution of the crank.
Q.2
The periodic time of one oscillation for a simple pendulum is
Q.3
When a body is subjected to transverse vibrations, the stress induced in a body will be
Q.4
Which gear train is used for higher velocity ratios in a small space?
Q.5
The number of links and instantaneous centers in a reciprocating engine mechanism are
Q.6
Angle of action of cam is defined as the angle
Q.7
If ω/ωn = 2, where co is the frequency of excitation and ωn is the natural frequency of vibrations, then the transmissibility of vibration will the
Q.8
A system of masses rotating in different parallel planes is in dynamic balance if the
Q.9
________ is an inversion of Double slider crank chain.
Q.10
Which of the following is an inversion of a double slider crank chain?
Q.11
Which of the following is an inversion of a single slider crank chain?
Q.12
Which of the following is an inversion of Single slider crank chain?
Q.13
The Coriolis component of acceleration leads the sliding velocity by
Q.14
Which of the following mechanisms produces mathematically an exact straight line motion?
Q.15
If the opposite links of a four bar linkage are equal, the links will always form a
Q.16
The flank of the tooth is the surface of the tooth __________ the pitch surface.
Q.17
Whirling speed of the shaft is the speed at which
Q.18
If the damping factor for a vibrating system is unity, then the system will be
Q.19
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
Q.20
An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has
Q.21
The partial balancing of reciprocating parts in locomotives produces
Q.22
The acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be
Q.23
An exact straight line motion mechanism is a
Q.24
In a mechanism, usually one link is fixed. If the fixed link is changed in a kinematic chain, then relative motion of other links
Q.25
In a Hartnell governor, the stiffness of the spring is given by (where S1 and S2 = Spring forces exerted on the sleeve at max. and min. radii of rotation, and h = Compression of the spring)
Q.26
A mass of 1 kg is attached to the end of a spring with a stiffness of 0.7 N/mm. The critical damping coefficient of this system is
Q.27
The Hooke's joint consists of:
Q.28
In a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done
Q.29
The relation between the controlling force (Fc) and radius of rotation (r) for a stable spring controlled governor is
Q.30
The velocity of a particle moving with simple harmonic motion, at any instant is given by (where ω = Displacement of the particle from mean position)
Q.31
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
Q.32
The Grubler's criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)
Q.33
The maximum value of the pressure angle in case of cam is kept as
Q.34
The example of higher pair is
Q.35
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)
Q.36
In a screw jack, the effort required to lower the load W is given by
Q.37
The factional torque for square thread at the mean radius r while raising load W is given by
Q.38
Which type of gearing is used in steering system of an automobile?
Q.39
When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.
Q.40
Length of arc of contact is given by
Q.41
To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?
Q.42
In a band and block brake, the ratio of tensions on tight side and slack side of the band is (where μ = Coefficient of friction between the blocks and the drum, θ = Semi-angle of each block subtending at the center of drum, and n = Number of blocks)
Q.43
The natural frequency of free transverse vibrations due to a point load acting over a simply supported shaft is equal to (where δ = Static deflection of a simply supported shaft due to the point load)
Q.44
If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
Q.45
When the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
Q.46
A single degree of freedom system is given by, m × (d²x/dt²) + c × (dx/dt) + sx = F.cosω.t with usual notations. It represents
Q.47
A mechanism _________ for transmitting or transforming motion.
Q.48
The motion between a pair which takes place in __________ is known as incompletely constrained motion.
Q.49
A body will begin to move down an inclined plane, if the angle of inclination of the plane is ________ the angle of friction.
Q.50
The frictional torque transmitted in a conical pivot bearing, considering uniform pressure, is (where R = Radius of shaft, and α = Semi-angle of the cone)
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