Related Questions
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4
Minimum number of teeth for involute rack and pinion arrangement for pressure angle of 20° is
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4
The ratio of maximum fluctuation of energy to the workdone per cycle is called
B. Maximum fluctuation of energy
C. Coefficient of fluctuation of energy
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4
The two links OA and OB are connected by a pin joint at O. If the link OA turns with angular velocity ω₁ rad/s in the clockwise direction and the link OB turns with angular velocity ω₂ rad/s in the clockwise direction, then the rubbing velocity at the pin joint O is (where r = Radius of the pin at O)
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4
The maximum efficiency of a screw jack is
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4
In a reciprocating steam engine, which of the following forms a kinematic link?
B. Piston rod and connecting rod
C. Crankshaft and flywheel
D. Flywheel and engine frame
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4
Which of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?
D. Meyer's expansion valve
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The balancing weights are introduced in planes parallel to the plane of rotation of the disturbing mass. To obtain complete dynamic balance, the minimum number of balancing weights to be introduced in different planes is
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The indicator using Watt mechanism is known as
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The acceleration of a flat-faced follower when it has contact with the flank of a circular arc cam, is given by
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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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A rotary internal combustion engine has __________ cylinders.
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According to Kennedy's theorem, if three bodies move relatively to each other, their instantaneous centres will lie on a
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For dynamic balancing of a shaft
A. The net dynamic force acting on the shaft is equal to zero
B. The net couple due to the dynamic forces acting on the shaft is equal to zero
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One end of a helical spring is fixed while the other end carries the load W which moves with simple harmonic motion. The frequency of motion is given by (where δ = Deflection of the spring)
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4
For the brake to be self locking, the force P at C shown in the below figure, should
B. Act in upward direction
C. Act in downward direction
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A point on a connecting link (excluding end points) of a double slider crank mechanism traces a
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The number of links in pantograph mechanism is equal to
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When one of the links of a kinematic chain is fixed, the chain is known as a
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The instantaneous centres which vary with the configuration of mechanism are called
A. Permanent instantaneous centres
B. Fixed instantaneous centres
C. Neither fixed nor permanent instantaneous centres
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In a mechanism, the fixed instantaneous centres are those centres which
A. Remain in the same place for all configurations of the mechanism
B. Vary with the configuration of the mechanism
C. Moves as the mechanism moves, but joints are of permanent nature
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Longitudinal 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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Which of the following has sliding motion?
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The displacement of the D-slide valve is __________ the steam lap by a distance known as lead of the valve.
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A point on a link connecting double slider crank chain traces a
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Ackermann steering gear consists of
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The component of the acceleration, parallel to the velocity of the particle, at the given instant is called
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In higher pair, the relative motion is
D. Combination of sliding and turning
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In gears, interference takes place when
A. The tip of a tooth of a mating gear digs into the portion between base and root circles
B. Gears do not move smoothly in the absence of lubrication
C. Pitch of the gears is not same
D. Gear teeth are undercut
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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)
C. P = W (sin α + μ cos α)
D. P = W (cos α + μ sin α)
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The Hooke's joint consists of: