Related Questions
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The velocity of the rubbing surface __________ with the distance from the axis of the bearing.
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When the crank is at the inner dead centre, in a reciprocating steam engine, then the velocity of the piston will be
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4
The frequency of damped vibrations with viscous damping is ________ the frequency of undamped vibrations.
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4
When two links are connected by a pin joint, their instantaneous centre lies
A. On their point of contact
B. At the centre of curvature
C. At the centre of circle
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4
Klein's construction is useful to determine
A. Velocity of various parts
B. Acceleration of various parts
C. Displacement of various parts
D. Angular acceleration of various parts
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4
A circle passing through the pitch point with its center at the center of cam axis is known as
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4
The moment on the pulley which produces rotation is called
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4
________ is an inversion of Double slider crank chain.
A. Coupling rod of a locomotive
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4
The maximum or minimum value of the swaying couple is
C. ± (a/√2) (1 - c) m.ω².r
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When the elements of a pair are kept in contact by the action of external forces, the pair is said to be a
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Inertia force acts
A. Perpendicular to the acceleration force
B. Along the direction of acceleration force
C. Opposite to the direction of acceleration force
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The equation of motion for a single degree of freedom system with viscous damping is 4(dx²/dt²) + 9(dx/dt) + 16x. The damping ratio of the system is
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4
TJIE horse power transmitted by a belt is dependent upon
A. Tension on tight side of belt
B. Tension on slack side of belt
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Maximum fluctuation of energy in a flywheel is equal to [where I = Mass moment of inertia of the flywheel, E = Maximum fluctuation of energy, CS = Coefficient of fluctuation of speed, and ω = Mean angular speed = (ω₁ + ω₂)/2]
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4
Torsional vibrations are said to occur when the particles of a body moves
A. Perpendicular to its axis
C. In a circle about its axis
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If D₁ and D₂ be the diameters of driver and driven pulleys, then belt speed is proportional to
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4
Two heavy rotating masses are connected by shafts of lengths l₁, l₂ and l₃ and the corresponding diameters are d₁, d₂ and d₃. This system is reduced to a torsionally equivalent system having uniform diameter d = d₁ of the shaft. The equivalent length of the shaft is
B. l = l₁ + l₂.(d₁/d₂)³ + l₂.(d₁/d₃)³
C. l = l₁ + l₂.(d₁/d₂)⁴ + l₃.(d₁/d₃)⁴
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With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by
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4
A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is
C. Soundness would depend upon which link is kept fixed
D. Data is not sufficient to determine same
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4
The effort of a Porter governor is equal to (where c = Percentage increase in speed, m = Mass of ball, and M = Mass on the sleeve)
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The number of links and instantaneous centers in a reciprocating engine mechanism are
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The acceleration of the particle moving with simple harmonic motion is _________ at the mean position.
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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
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4
In an open pair, the two elements of a pair
A. Have a surface contact when in motion
B. Have a line or point contact when in motion
C. Are kept in contact by the action of external forces, when in motion
D. Are not held together mechanically
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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
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The critical speed of a shaft with a disc supported in between is equal to the natural frequency of the system in
C. Longitudinal vibrations
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A mechanism __________ for transmitting or transforming motion.
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A pantograph is a mechanism with
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Sensitiveness of the governor is defined as the ratio of the
A. Mean speed to the maximum equilibrium speed
B. Mean speed to the minimum equilibrium speed
C. Difference of the maximum and minimum equilibrium speeds to the mean speed
D. Sum of the maximum and minimum equilibrium speeds to the mean speed
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The Hooke's joint consists of: