Top 250+ Solved Theory of Machines MCQ Questions Answer
Q. The type of governor used in record players for adjusting the speed of turn table generally is
a. Porter governor
b. Proell governor
c. Hartung governor
d. Simple Watt's governor
e. Pickering governor
Q. A belt drive is
a. A positive drive
b. Not a positive drive
c. Meant for small torque transmission only
d. Used only when the two pulleys have parallel axis
e. None of the above
Q. The engine of an aeroplane rotates in a clockwise direction when seen from the tail end and the aeroplane takes a turn torwards left. The effect of gyroscopic couple on aeroplane is
a. to raise the nose and dip the tail
b. to dip the nose and raise the tail
c. to roll the aeroplane slightly in the clockwise direction when viewed from tail end
d. None of the above
e. None of the above
Q. A V belt designated as C 3048/120 will have
a. Approximately 120 inch inside length
b. Approximately 120 cm inside length
c. C section, length unspecified
d. Width 120 mm
e. None of the above
Q. A cycle chain is a kinematic chain
a. Yes
b. No
c. Yes, provided the links are limited in number
d. Yes provided the distance is limited
e. None of the above
Q. A kinematic chain must have at least
a. Four links and two turning pairs
b. Four links and four turning pairs
c. Four links and five turning pairs
d. Two links and two turning pairs
e. Three links and two turning pairs
Q. In order to balance the reciprocating masses, the conditions to be satisfied are
a. Primary forces must balance
b. All above conditions must be satisfied
c. Secondary couples must balance
d. Primary couples must balance
e. Secondary forces must balance
Q. A cam profile is the
a. Actual working contour of the cam
b. Profile of path traced by a cam follower
c. Total surface area of the cam
d. Path which the cam follower traces
e. The profile of the path to be traced by the mechanism driven by follower
Q. The number of instantaneous centres for a four bar chain mechanism would be
a. 4
b. 6
c. 5
d. 3
e. 2
Q. Which dynamometer will be most suitable for measuring the BHP of an automobile engine?
a. Electrical generator type
b. Rope brake type
c. Prony brake
d. Electrical resistance type
e. Hydraulic
Q. In case of locomotives, the effect of hammer blow is counteracted by
a. Flanges of the tyres of the wheels
b. Balancing weights
c. Inside section of the rails
d. Dead weight of the engine
e. All of the above
Q. A 0.5 kg weight attached to a light spring elogates it 7.87 mm. The natural frequency of the system would be in the range
a. 100-175 cpm
b. 300-350 cpm
c. 175-290 cpm
d. 25-50 cpm
e. 50-100 cpm
Q. The secondary critical speed of a shaft occurs at
a. Twice the primary critical speed
b. Occurs only when there are more than 2 rotors on a shaft
c. Four times the primary critical speed
d. If the externam exciting system has a frequency other than the primary critical speed
e. Half the primary critical speed
Q. Which of the following instruments may be used in vibration measurements?
a. Photometer
b. Accelerometer
c. Dynamometer
d. Balometer
e. None of the above
Q. In locomotives the unbalanced part of the primary disturbing force due to reciprocating masses, cause
a. Variation of tractive effect
b. Periodical vibrations
c. Lifting of locomotive
d. Oscillation in vertical planes
e. Hammer blow