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This set of Theory of Machines Multiple Choice Questions & Answers (MCQs) focuses on Theory Of Machines Set 2

Q1 | A shaft having one end fixed has a disc oscillating freely at the other end. If the shaft stiffness, increases the natural frequency of vibrations will
  • Increase
  • Decrease
  • There will be no effect
  • Will depend on the stiffness of the disc
  • None of the above
Q2 | If a machine uses four V belts, while purchasing care should be taken to ensure that
  • All belts are same section
  • All above
  • All belts are of same batch number
  • All belts are of same size
  • All belts are of same manufacturers
Q3 | In case of balancing problems pertaining to locomotives, the resultant unbalanced force is minimum when
  • Half of the reciprocating masses are balanced by rotating masses
  • 1/2 of the reciprocating mass are balanced by equivalent rotating mass
  • More than half of the reciprocating masses are balanced by rotating masses
  • Reciprocating masses are balanced half by equivalent opposite reciprocating masses and the balance by rotating masses
  • None of the above
Q4 | Which of the following is a higher pair?
  • A shaft revolving in a bearing
  • Piston reciprocating inside the cylinder
  • Automobile steering gear
  • Ball and socket
  • None of the above
Q5 | The vibrations in which the restoring forces are not proportional to the displacements and the first power of velocity are known as
  • Bearing vibrations
  • Over damped vibrations
  • Torsional vibrations
  • Non-linear vibrations
  • Under damped vibrations
Q6 | If a particle of a link has a velocity when changes both in magnitude and direction at any instant, then
  • It must have three components of acceleration e.g. centripetal, centrifugal and gravitational
  • It must have two components of acceleration e.g. centripetal, and tangential
  • It must have three components of acceleration e.g. centripetal centrifugal and tangential
  • It must have four components of acceleration e.g. centripetal, centrifugal gravitational and tangential
  • It must have only unidirectional acceleration
Q7 | Which of the following oil has highest specific gravity?
  • Turpentine
  • Diesel
  • Castor oil
  • Petrol
  • Sperm
Q8 | In case of involute gears
  • Interference is inherently absent
  • A convex flank is always in contact with concave flank
  • Variation in centre distance of shafts increases radial force
  • Pressure angle is constant throughout the teeth engagement
  • None of the above
Q9 | The rotor of a ship rotates in anticlock wise direction when viewed from the bow end and the ship takes a left turn. The effect of gyroscopic couple on the ship is
  • to lower the bow and raise the stern
  • to raise the bow and lower then stern
  • to roll the ship slightly clockwise when viewed fro bow end
  • None of the above
  • None of the above
Q10 | In case of gears, the module is
  • The length of the pitch circule diameter per tooth
  • The number of teeth per unit length on pitch circle diameter
  • The pistance measured along the pitch circle from a point on one tooth to a corresponding point on the adjacent point
  • Any of the above
  • None of the above
Q11 | Hammer blow in locomotives results in
  • Variable horizontal force
  • Tendency to lift wheel from rails
  • Uniform torque
  • Pulsating torque
  • Uneven speed
Q12 | In Iocomotive operation, the swaying couple results due to
  • Primary disturbing force
  • Use of double acting cylinders
  • Hammer blow
  • Use of two cylinders
  • High speeds
Q13 | Which of the following is a centrifugal type governor?
  • Watt governor
  • Hartnell governor
  • Porter governor
  • All of the above
  • None of the above
Q14 | The maximum efficiency of a screw jack provided with square threads and angle of friction 30? will be
  • 47.50%
  • 60%
  • 25%
  • 33%
  • 50%
Q15 | A governor is said to be stable when
  • There is one radius of the governor weights for each equilibrium speed
  • There is minimum change of the radius of the governor weights at a operating speed
  • The position of balls does not change within the operating speed
  • The position of balls changes within permissible limits within the working range of a governor
  • None of the above
Q16 | Klien's construction gives graphical construction for
  • Both of above
  • Acceleration polygon
  • Slider-crank mechanism
  • Velocity polygon
  • Four bar chain mechanism
Q17 | Can simple band brake be made self-energising type
  • No
  • Yes, but with require several modifications
  • Will not be economical
  • Yes
  • Yes, but with few limitations
Q18 | For speed reduction in the ratio of 100 the type of gear preferred is
  • Spur gear
  • Worm and worm wheel
  • Bevel gear
  • Hypoid gear
  • Helical gear
Q19 | The moment of friction with the assumption of uniform wear to uniform pressure is
  • Same
  • Greater
  • Lower
  • (A) and (B) above
  • (A) and (C) above
Q20 | The type of governor used in record players for adjusting the speed of turn table generally is
  • Porter governor
  • Proell governor
  • Hartung governor
  • Simple Watt's governor
  • Pickering governor
Q21 | A belt drive is
  • A positive drive
  • Not a positive drive
  • Meant for small torque transmission only
  • Used only when the two pulleys have parallel axis
  • None of the above
Q22 | 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
  • to raise the nose and dip the tail
  • to dip the nose and raise the tail
  • to roll the aeroplane slightly in the clockwise direction when viewed from tail end
  • None of the above
  • None of the above
Q23 | A V belt designated as C 3048/120 will have
  • Approximately 120 inch inside length
  • Approximately 120 cm inside length
  • C section, length unspecified
  • Width 120 mm
  • None of the above
Q24 | A cycle chain is a kinematic chain
  • Yes
  • No
  • Yes, provided the links are limited in number
  • Yes provided the distance is limited
  • None of the above
Q25 | A kinematic chain must have at least
  • Four links and two turning pairs
  • Four links and four turning pairs
  • Four links and five turning pairs
  • Two links and two turning pairs
  • Three links and two turning pairs