THEORY OF MACHINE QUIZ

The fundamental equation for correct steering is (where φ and α = Angle through which the axis of the outer wheel and inner wheel turns respectively, c = Distance between the pivots of the front axles, and d = Wheel base)

tanφ + cotα = b/c

sinφ + sinα = b/c

cosφ - sinα = c/b

cotφ - cotα = c/b

TRUE ANSWER : ?
YOUR ANSWER : ?

The pressure angle of a cam is the angle between the direction of the follower motion and a normal to the

Pitch circle

Pitch curve

Base circle

Prime circle

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In a four bar chain or quadric cycle chain

Each of the four pairs is a turning pair

Two are turning pairs and two are sliding pairs

One is a turning pair and three are sliding pairs

Three are turning pairs and one is a sliding pair

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YOUR ANSWER : ?

Longitudinal vibrations are said to occur when the particles of a body moves

Perpendicular to its axis

Parallel to its axis

None of these

In a circle about its axis

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The velocity of sliding of meshing gear teeth is (Where ω₁ and ω₂ are angular velocities of meshing gears and ‘y’ is distance between point of contact and the pitch point)

(ω₁ × ω₂) y

(ω₁ + ω₂) y

(ω₁/ω₂) y

(ω₁ + ω₂)/y

TRUE ANSWER : ?
YOUR ANSWER : ?

Angle of action of cam is defined as the angle

Moved by the cam from beginning of ascent to the termination of descent

Through which the cam rotates during the period in which the follower remains in the highest position

Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Of rotation of the cam for a definite displacement of the follower

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The frictional torque transmitted by a disc or plate clutch is same as that of

Truncated conical pivot bearing

Conical pivot bearing

Flat collar bearing

Flat pivot bearing

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If ‘D₁’ and ‘D₂’ be the diameters of driver and driven pulleys, then belt speed is proportional to

D₂/D₁

D₁

D₁/D₂

D₁.D₂

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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)

P = W tan(φ - α)

P = W tan(α - φ)

P = W cos(α + φ)

P = W tan(α + φ)

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YOUR ANSWER : ?

The contact ratio is given by

(Length of path of recess)/(Circular pitch)

(Length of the path of approach)/(Circular pitch)

(Length of the arc of contact)/(Circular pitch)

(Length of the arc of approach)/cosφ

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