Related Questions
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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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4
The coriolis component of acceleration depends upon
B. Angular velocity of the link
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4
Which of the following would constitute a link?
A. Piston, piston rod and cross head
C. Piston rod and cross head
D. Piston, crank pin and crank shaft
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4
Which of the following governor is used to drive a gramophone?
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4
A reed type tachometer use the principle of
A. Longitudinal vibration
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4
The two elements of a pair are said to form a higher pair, when they
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. Permit relative motion
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4
The frictional torque transmitted in a conical pivot bearing, considering uniform wear, is
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4
Ackermann steering gear consists of
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The maximum fluctuation of energy is the
A. Difference between the maximum and minimum energies
B. Sum of the maximum and minimum energies
C. Variations of energy above and below the mean resisting torque line
D. Ratio of the mean resisting torque to the workdone per cycle
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4
The cam and follower is an example of
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Kinematic pairs are those which have
A. Point or line contact between the two elements when in motion
B. Surface contact between the two elements when in motion
C. Elements of pairs not held together mechanically
D. Two elements that permit relative motion
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4
The driving and driven shafts connected by a Hooke's joint will have equal speeds, if
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4
The mechanism consisting of three turning pairs and one sliding pair, is called a
A. Single slider crank chain
B. Whitworth quick return motion mechanism
C. Crank and slotted lever quick return motion mechanism
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4
When the crank is at the outer dead centre, in a reciprocating steam engine, then the acceleration of the piston will be
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In order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at
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The Hooke's joint consists of:
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The following is the inversion of slider crank chain mechanism
A. Whitworth quick return mechanism
C. Oscillating cylinder engine
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4
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
A. Four times the first one
C. One fourth of the first one
D. One and a half times the first one
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4
The frictional torque transmitted in a flat pivot bearing with assumption of uniform pressure is _________ as compared to uniform wear.
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Module of a gear is
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In a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
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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
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4
If D₁ and D₂ be the diameters of driver and driven pulleys, then belt speed is proportional to
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4
The natural frequency of free transverse vibrations due to uniformly distributed load acting over a simply supported shaft is (where δS = Static deflection of simply supported shaft due to uniformly distributed load)
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When the addenda on pinion and wheel is such that the path of approach and path of recess are half of their maximum possible values, then the length of the path of contact is given by (where r = Pitch circle radius of pinion, R = Pitch circle radius of wheel, and φ = Pressure angle)
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In a screw jack, the effort required to lower the load W is given by
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The relation between number of pairs (p) forming a kinematic chain and the number of links (l) is
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The primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given by (where m = Mass of reciprocating parts, ω = Angular speed of crank, r = Radius of crank, θ = Angle of inclination of crank with the line of stroke, and n = Ratio of the length of connecting rod to radius of crank)
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The example of spherical pair is
D. Ball bearing and roller bearing
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To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use?