vBA x AB
✅ The correct answer is option D.
Theory of machines MCQs
The velocity of the reciprocating roller follower when it has contact with the straight flanks of the tangent cam, is given by (where ω = Angular velocity of the cam shaft)
ω(r1 – r2)sin θ
ω(r1 + r2)sinθ sec2θ
ω(r1 – r2)cos θ
ω(r1 + r2)cos θ cosec2
✅ The correct answer is option B.
The component of the acceleration, perpendicular to the velocity of the particle, at the given instant is called
radial component
tangential component
coriolis component
none of these
✅ The correct answer is option A.
In under damped vibrating system, if x1 and x2 are the successive values of the amplitude on the same side of the mean position, then the logarithmic decrement is equal to
log
loge
log(x1.x2)
✅ The correct answer is option B.
A system of masses rotating in different parallel planes is in dynamic balance if the
resultance force is equal to zero
resultant couple is equal to zero
resultant force and resultant couple are both equal to zero
resultant force is num
✅ The correct answer is option C.
The Klein’s method of construction for reciprocating engine mechanism
is a simplified version of instantaneous centre method
utilises a quadrilateral similar to the diagram of mechanism for reciprocating engine
enables determination of coriolis component
is based on the accele
✅ The correct answer is option B.
In involute gears, the pressure angle is
dependent on the size of teeth
dependent on the size of gears
always constant
always variable
✅ The correct answer is option C.
The rolling of a complete ship side-ways is known as pitching of a ship.
TRUE
FALSE
✅ The correct answer is option B.