Theory Of Machines Set 10

Mechanical Engineering

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This set of Theory of Machines Multiple Choice Questions & Answers (MCQs) focuses on Theory Of Machines Set 10

Q1 | The key generally used in wrist watches is
  • Saddle key
  • Sunk key
  • Wood ruff key
  • Tangent key
  • None of the above
Answer: Saddle key
Q2 | In case of involute the angular velocity ratio is
  • Directly proportional to radius of base circle from which the involute was generated
  • Inversely proportional to radius of base circle from which the involute was generated
  • Directly proportional to the distance of the chord over which thread is unwound
  • Inversely proportional to the distance of the chord over which thread is wound
  • None of the above
Answer: Inversely proportional to radius of base circle from which the involute was generated
Q3 | Which one of the following is not a spring controlled governor?
  • Porter governor
  • Hartnell governor
  • Pickering governor
  • None of the above
  • None of the above
Answer: Porter governor
Q4 | The purpose of differential in locmomtive is served by
  • Shape of rails
  • Taper on wheels
  • Taper on rails
  • Track contour
  • Track curvature
Answer: Taper on wheels
Q5 | The normal at any point of a involute is
  • Also normal to that circle
  • Tangent to the circle
  • Is inclined to the normal to the circle at an angle equal to pressure angle
  • Is inclined to the tangent to the circle at an angle equal to the pressure angle
  • None of the above
Answer: Tangent to the circle
Q6 | The number of links in Paucellier mechanism is
  • 4
  • 5
  • 6
  • 8
  • None of the above
Answer: 8
Q7 | A point on a link connecting double slider crank chain will trace a (an)
  • Straight line
  • Parabola
  • Ellipse
  • Hyperbola
  • Circle
Answer: Ellipse
Q8 | The differential gear in the automobiles is used to
  • Provide balancing
  • Assist in changing speed
  • Help in turning
  • Provide jerk free movement of vehicle
  • Reduce speed
Answer: Help in turning
Q9 | The abbreviation P.I.V. drive system stands for
  • Purely Integral Variance
  • Positive Infinitely Variable
  • Periodic Ideal Vibrationless
  • Polar Inertia Vee belt
  • Perfectly Induced Velocities
Answer: Positive Infinitely Variable
Q10 | The Biflar susperision method is used to determine
  • Position of balancing weights
  • Centripetal acceleration
  • Natural frequency of vibration
  • Moment of inertia
  • None of the above
Answer: Moment of inertia
Q11 | A Scott-Russel mechanism consists of
  • Turning and rotary pairs
  • Turning pair only
  • Sliding and turning pairs
  • Sliding and rotary pairs
  • Rotary pair only
Answer: Sliding and turning pairs
Q12 | If three bodies have plane motions, their instantataneous centres
  • Lie in different planes
  • Lie in a plane perpendicular to the plane of motion
  • Lie in the same plane as the plane of motion
  • Lie on a straight line
  • None of the above
Answer: Lie on a straight line
Q13 | The prime circle of a cam is
  • The smallest circle drawn to the pitch curve from the centre of rotation of curve
  • The smallest circle drawn to the cam profile from the centre of rotation of a radial cam
  • The circle with centre as the centre of cam axis and radius such that it passes through the pitch point
  • The circle fitting in cam profile
  • None of the above
Answer: The smallest circle drawn to the pitch curve from the centre of rotation of curve
Q14 | A pulley in a belt drive acts as a
  • Rolling pair
  • Turning pair
  • Surface pair
  • Sliding pair
  • Cylindrical pair
Answer: Rolling pair
Q15 | In the gear box of an automobile, which gear train is used?
  • Simple gear train
  • Compound gear train
  • Epicyclic gear train
  • None of the above
  • None of the above
Answer: Compound gear train
Q16 | The locus of a point one the circumference of a circle which rolls without slipping on a fixed straight line, is known as
  • Involute
  • Epicycloid
  • Cycloid
  • Hypocycloid
  • None of the above
Answer: Cycloid
Q17 | Stub tooth is
  • Shorter than standard tooth depth
  • Standard gear tooth
  • Equivalent rack tooth
  • Non-standard tooth
  • Longer than standard tooth depth
Answer: Shorter than standard tooth depth
Q18 | Which of the following road offers maximum resistance to automobiles?
  • Wood paving
  • Macadam
  • Well rolled ground
  • Loose sand
  • None of the above
Answer: Loose sand
Q19 | In case of worm and worm wheel, the maximum efficiency is obtained when
  • Worm is driver
  • Worm wheel is driver
  • Either of the worm or worm wheel is a driver
  • Depends on other factors
  • None of the above
Answer: Either of the worm or worm wheel is a driver
Q20 | In a balancing machine, the units for unbalance measurement are
  • gm-cm-cps
  • cps
  • cm
  • gram
  • gm-cm
Answer: gm-cm
Q21 | The type of teeth used on a gear used in sugar crushing is
  • Hyperboild
  • Semi-epicycloidal
  • Involute
  • Cycloidal
  • Epicycloidal
Answer: Cycloidal
Q22 | In a pin jointed mechanism, the line of thrust on a link is
  • tangential to the friction circles at the ends
  • along the friction axis
  • inclined to axis of link by an angle ?, known as angle of friction
  • All the above
  • None of the above
Answer: All the above
Q23 | In automobiles, Hooke's joint is used between
  • Flywheel and clutch
  • Clutch and gear box
  • Gear box and differential
  • Differential and wheels
  • None of the above
Answer: Gear box and differential
Q24 | A pair is termed as a higher pair when relative motion between two elements of the pair is
  • partly sliding and partly turning
  • rolling only
  • Outer circle
  • sliding only
  • turning only
Answer: rolling only
Q25 | The swaying couple in a locomotive is due to
  • unbalanced primary forces
  • unbalanced secondary forces
  • partial balancing
  • None of the above
  • None of the above
Answer: partial balancing
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