In the same direction as angular velocityIn the opposite direction to angular velocityIt can be any of the above directionsAt a right angle to angular velocityNone of the listed directions

4.Klein's method provides a graphical technique to construct which of the following?

slider-crank linkagevelocity diagramacceleration diagramfour-bar linkageangular acceleration

5.How many centers are present in a crank-driven slider-crank mechanism?

NoneTwoFourSixVaries depending on the mechanism's position

6.What is the phase relationship of the Coriolis component relative to the sliding velocity vector?

It leads the sliding velocity vector by 90 degreesIt lags behind the sliding velocity vector by 90 degreesIt aligns directly with the sliding velocity vectorIt leads the sliding velocity vector by 180 degreesNone of the listed options

7.What can Klein’s construction be used to find in mechanical systems?

Speed of different componentsAcceleration of different componentsPosition changes of different componentsAngular acceleration of different componentsAll the above

8.What is the highest allowable pressure angle for a cam mechanism?

10 degrees14 degrees20 degrees30 degrees25 degrees

9.The size of a cam is determined by which of the following?

Base circlePitch circlePrime circleOuter circleNone of these

10.What is the name of the circle that passes through the pitch point and has its center at the cam axis center?

circle of pitchesfoundational circleprime circleexternal circlecamshaft circle

11.How are cylindrical cams categorized?

circular typetangential typereciprocating typeall the mentioned typesnone of these

12.For a given lift and angle of ascent, how does a smaller base circle affect the pressure angle?

It results in a lower pressure angleIt causes a higher pressure angleThere is no impact on the pressure angleIt leads to an unrelated effectNone of the stated options are correct

13.What does the angle of descent of a cam represent?

The angle through which the follower moves back to its starting positionThe cam's rotation angle corresponding to a specific follower displacementThe cam's rotation angle while the follower stays at its maximum heightThe cam rotation from when the follower starts rising until it reaches the peakThe cam rotation from the start of the follower's ascent to the end of its descent

14.What does the angle of dwell of a cam refer to?

The angle during which the follower moves back to its starting pointThe cam's rotation angle corresponding to a specific follower movementThe rotation angle of the cam while the follower stays at its peak positionThe angle covered by the cam from when the follower starts rising until it reaches the topThe cam's rotation from the start of the follower's ascent to the end of its descent

15.What does the term 'cam angle' refer to?

The angle during which the follower moves back to its starting pointThe amount of cam rotation corresponding to a specific follower displacementThe rotation angle of the cam while the follower stays at its maximum positionThe cam's rotation from the moment the follower starts rising until it reaches its peakThe cam rotation from the beginning of the follower's ascent to the end of its descent

16.What does the term 'angle of action' of a cam refer to?

The angle during which the follower returns to its starting pointThe cam's rotation angle corresponding to a specific follower displacementThe angle through which the cam turns while the follower stays at its peak positionThe rotation of the cam from the moment the follower starts to rise until it reaches the topThe cam's rotation from the start of the follower's upward movement to the end of its downward movement

17.What does the angle of ascent of a cam represent?

The angle during which the follower moves back to its starting pointThe cam's rotation angle corresponding to a specific follower displacementThe rotation angle of the cam while the follower stays at its peak positionThe angle through which the cam rotates from the moment the follower starts rising until it reaches its maximum heightThe cam's rotation from the start of the rise until the end of the fall

18.Which factors influence the pressure angle in a cam mechanism?

The displacement between the cam and follower centerlinesThe vertical movement of the followerThe angle through which the follower risesThe combined radii of the base circle and the roller followerAll of the above factors

19.Under which condition is Klein’s construction applicable?

The crank rotates at a constant angular velocityThe crank rotates with a variable angular velocityThe crank experiences a steady angular accelerationThe crank maintains both constant angular velocity and angular accelerationNo specific condition is required

20.In which direction does the Coriolis component act relative to sliding surfaces?

At a right angle to the sliding surfacesParallel to the sliding surfacesSomewhere between perpendicular and parallel to the surfacesIn an unpredictable mannerNone of the listed directions

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How to prepare with Theory of Machines MCQs

Work through questions topic by topic, then revisit any you answered incorrectly.
Read explanations carefully—they often cover facts that repeat across PPSC, FPSC, and NTS papers.
Pair subject practice with past papers to see how Theory of Machines appears in real exam conditions.

Theory of Machines

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Practice questions

1.The Coriolis acceleration component appears whenever an object travels along a trajectory involving which type of motion?

2.Does the Coriolis acceleration component occur in a shaper mechanism?

3.What is the possible direction of tangential acceleration?