Q.1
Angular acceleration of a link can be determined by dividing the
Q.2
A torsional system with discs of moment of inertia I₁ and I₂ as shown in the below figure, is gear driven such that the ratio of speed of shaft B to shaft A is 'G'. Neglecting the inertia of gears, the equivalent inertia of disc on shaft B at the speed of shaft A is equal to
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Q.3
A pulley and belt in a belt drive form a
Q.4
Elements of pairs held together mechanically is known as
Q.5
Carnot cycle is
Q.6
The unbalanced primary forces in a reciprocating engine are
Q.7
A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
Q.8
The height of a Watt's governor is
Q.9
A spring controlled governor is found unstable. It can be made stable by
Q.10
A governor is said to be stable, if the
Q.11
In a hydrodynamic journal bearing, there is
Q.12
If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be
Q.13
In gramophones for adjusting the speed of the turntable, the following type of governor is commonly employed
Q.14
A spring controlled governor is said to be isochronous when the controlling force
Q.15
A spring controlled governor is said to be unstable when the controlling force
Q.16
A shaft has two heavy rotors mounted on it. The transverse natural frequencies, considering each of the rotor separately, are 100 Hz and 200 Hz respectively. The lowest critical speed is
Q.17
For a twin cylinder V-engine, the crank positions for primary reverse cranks and secondary direct cranks are shown in the below figure. The engine is a
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Q.18
Hart mechanism has
Q.19
The periodic time is given by (where ω = Angular velocity of the particle in rad/s)
Q.20
ABCD is a four bar mechanism in which AB = 310 mm and CD = 450 mm. AB and CD are both perpendicular to the fixed link AD, as shown in the below figure. If the velocity of B at this condition is v. Then the velocity of C is
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Q.21
Which of the following statement is wrong?
Q.22
The Scott-Russell mechanism consists of
Q.23
Which of the following statement is wrong?
Q.24
The number of links in pantograph mechanism is equal to
Q.25
The indicator using Watt mechanism is known as
Q.26
Which is the false statement about the properties of instantaneous center?
Q.27
In a Hartnell governor, the lift of the sleeve is given by (where r₁ and r₂ = Max. and min. radii of rotation, x = Length of ball arm of the lever, and y = Length of sleeve arm of the lever)
Q.28
Frequency of vibrations is usually expressed in
Q.29
In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called
Q.30
If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be
Q.31
A rigid body, under the action of external forces, can be replaced by two masses placed at a fixed distance apart. The two masses form an equivalent dynamical system, if
Q.32
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
Q.33
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
Q.34
When the nature of contact between the elements of a pair is such that one element can turn about the other by screw threads, the pair is known as a
Q.35
The main disadvantage of the sliding pair is that it is
Q.36
The mechanism in which two are turning pairs and two are sliding pairs, is called a
Q.37
In a pantograph, all the pairs are
Q.38
A system in dynamic balance implies that
Q.39
For dynamic balancing of a shaft
Q.40
Cross head and guides form a
Q.41
A slider crank chain consists of following numbers of turning and sliding pairs
Q.42
A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)
Q.43
In the two rotor system as shown in the below figure (I₁ < I₂), a node of vibration is situated
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