The locus of a point one the circumference of a circle which rolls without slipping on a fixed straight line, is known as
A.Involute
B.Epicycloid
C.Cycloid
D.Hypocycloid
E.None of the above
Category: Theory of Machines Mcqs
According to the law of gearing
A.Common normal at the point of contact always passes through a fixed point (pitch point) on the line joining the centres of rotation
B.Teeth should be involute type
C.Teeth should be cycloidal type
D.Clearance should be minimum 0.15 mm
E.The gears whould be cut with the cutter having same module
In case of lower pairs
A.There is surface contact between the two elements while in the motion
B.There is line contact between the two elements while in the motion
C.There is point contact between the two elements while is motion
D.The contact is only at lower end of the two elements while in motion
E.None of the above
In case of gears the tooth fillet is
A.Width of the gear tooth
B.Curve forming face and flank
C.Surface of the top of the tooth
D.Radius that connects the root circle to the profile of the tooth
E.Part of the tooth surface lying below the pitch surface
Timing belt
A.Have no slip
B.Have maximum slip during starting
C.Slip in proportion to the time of operation
D.Are used to determine the life time of a belt
E.None of the above
The cam angle is
A.The angle subtended by the live portion of the cam for a definite displacement of the follower
B.The angle subtended by live portion of the cam at the cam centre
C.The angle subtended at the cam centre by the protion of the cam during which the follower moves
D.The angle subtended by the cam at the cam centre when the follower dwells
E.None of the above
Which of the following instruments may be used in vibration measurements?
A.Photometer
B.Accelerometer
C.Dynamometer
D.Balometer
E.None of the above
The effect of creep in case of cross-belt drive is
A.To increase the power transmitted
B.To increase the speed of driven pulley
C.(A) and (B) above together
D.To reduce the speed of the driven pulley and consequently reduce the power output
E.None of the above
Which one of the following is a transmission type dynamometer?
A.Prony brake
B.Rope brake
C.Hydraulic dynamometer
D.Electric generator types
E.None of the above
A governor is said to be stable when
A.There is one radius of the governor weights for each equilibrium speed
B.There is minimum change of the radius of the governor weights at a operating speed
C.The position of balls does not change within the operating speed
D.The position of balls changes within permissible limits within the working range of a governor
E.None of the above
