In case of cross-helical worm the axes of two shafts are
A.Parallel
B.Non-parallel
C.Intersecting
D.Non-intersecting
E.Non-parallel-non intersecting
Category: Theory of Machines Mcqs
Dynamically unbalanced masses in rotating machines cause
A.Noise
B.Friction
C.Wear
D.Vibrations
E.All of the above
Which of the following is not a positive drive?
A.Rope drive
B.Flat belt drive
C.V-belt drive
D.All of the above
E.None of the above
Velocity of sliding between two mating gear surfaces can be defined as
A.Sum of their angular velocities x distance between pitch point and point of contact.
B.Sum of their angular velocities x distance between their centres of rotation.
C.Sum of their angular velocities x difference between their pitch circle diameters
D.None of these
The vibrations in which the restoring forces are not proportional to the displacements and the first power of velocity are known as
A.Torsional vibrations
B.Bearing vibrations
C.Under damped vibrations
D.Over damped vibrations
E.Non-linear vibrations
The no of links in Hart mechanism is
A.8
B.6
C.5
D.4
Which one of the following is not a spring controlled governor?
A.Porter governor
B.Hartnell governor
C.Pickering governor
D.None of the above
Coriolis component is encountered in
A.Slider crank mechanism
B.Four bar chain mechanism
C.Quich return mechanism
D.(A) and (B) above
E.(A) and (C) above
At node of the shaft
A.The vibrations are inimum
B.The vibrations are maximum
C.The vibrations are average
D.The vibrations are zero
E.None of the above
The normal at any point of a involute is
A.Also normal to that circle
B.Tangent to the circle
C.Is inclined to the normal to the circle at an angle equal to pressure angle
D.Is inclined to the tangent to the circle at an angle equal to the pressure angle
E.None of the above
