Theory of Machine
In a drag link quick return mechanism, the shortest link is always fixed. The sum of the shortest and longest link is

Greater than sum of other two
Less than sum of other two
Equal to sum of other two
There is no such relationship

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Theory of Machine
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)

m.ω².r cosθ
m.ω².r (cos 2θ/n)
m.ω².r sinθ
m.ω².r (sin 2θ/n)

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Theory of Machine
The frictional torque transmitted in a truncated conical pivot bearing, considering uniform pressure, is

(2/3). μ W cosecα (r₁ + r₂)
(1/2). μ W cosecα (r₁ + r₂)
(1/2). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]
(2/3). μ W cosecα [(r₁³ - r₂³)/(r₁² - r₂²)]

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Theory of Machine
The direction of Coriolis component of acceleration is the direction

Along the centripetal acceleration
Along tangential acceleration
Along perpendicular to angular velocity
Of relative velocity vector for the two coincident points rotated by 90° in the direction of the angular velocity of the rotation of the link

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