Multiple Choice Questions on Theory of MachinesThe Following Section consists of Multiple Choice Questions on Theory of machines.
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Theory of machines MCQ
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Question 1 of 20
1. Question
1 pointsFor an involute gear, the ratio of base circle radius and pitch circle radius is equal to
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Question 2 of 20
2. Question
1 pointsWhich of the following is an open pair?
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Question 3 of 20
3. Question
1 pointsA reed type tachometer use the principle of
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Question 4 of 20
4. Question
1 pointsWhen the sleeve of a Porter governor moves upwards, the governor speed
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Question 5 of 20
5. Question
1 pointsWhich of the following statement is correct ?
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Question 6 of 20
6. Question
1 pointsWhen the speed of the engine fluctuates continuously above and below the mean speed, the governor is said to be
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Question 7 of 20
7. Question
1 pointsThe maximum frictional force, which comes into play, when an body just begins to slide over the surface of the other body, is known as
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Question 8 of 20
8. Question
1 pointsIn a four stroke I.C. engine, the turning moment during the compression stroke is
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Question 9 of 20
9. Question
1 pointsWhich of the following is a higher pair?
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Question 10 of 20
10. Question
1 pointsWhen the belt is stationary, it is subjected to some tension known as initial tension. The value of this tension is equal to the
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Question 11 of 20
11. Question
1 pointsWhen the nature of contact between the elements of a pair is such that it can only slide relative to the other, the pair is known as a
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Question 12 of 20
12. Question
1 pointsThe inversion of a mechanism is
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Question 13 of 20
13. Question
1 pointsIf the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be
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Question 14 of 20
14. Question
1 pointsA body is said to be under forced vibrations, when
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Question 15 of 20
15. Question
1 pointsIn a gear having involute teeth, the normal to the involute is a tangent to the
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Question 16 of 20
16. Question
1 pointsThe instantaneous centres which vary with the configuration of mechanism, are called
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Question 17 of 20
17. Question
1 pointsThe primary unbalanced force is maximum __________ in one revolution of the crank
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Question 18 of 20
18. Question
1 pointsIn a turning moment diagram, the variations of energy above and below the mean resisting torque line is called
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Question 19 of 20
19. Question
1 pointsThe working depth of a gear is the radial distance from the
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Question 20 of 20
20. Question
1 pointsThe acceleration of a particle at any instant has two components i.e. radial component and tangential component. These two components will be
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Theory of machines MCQ 2
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Question 1 of 20
1. Question
1 pointsWhen the axes of the first and last wheels are co-axial, then the train is known as
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Question 2 of 20
2. Question
1 pointsThe cam and follower is an example of
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Question 3 of 20
3. Question
1 pointsFor two governors A and B, the lift of sleeve of governor A is more than that of governor B, for a given fractional change in speed. It indicates that
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Question 4 of 20
4. Question
1 pointsThe danger of breakage and vibration is maximum
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Question 5 of 20
5. Question
1 pointsIn a multiple V-belt drive, if one of the belt is broken, then we should replace
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Question 6 of 20
6. Question
1 pointsThe component of the acceleration, parallel to the velocity of the particle, at the given instant is called
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Question 7 of 20
7. Question
1 pointsThe swaying couple is due to the
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Question 8 of 20
8. Question
1 pointsThe lead screw of a lathe with nut forms a
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Question 9 of 20
9. Question
1 pointsWhen a slider moves on a fixed link having curved surface, their instantaneous centre lies
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Question 10 of 20
10. Question
1 pointsScotch yoke mechanism is used to generate
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Question 11 of 20
11. Question
1 pointsThe unbalanced primary forces in a reciprocating engine are
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Question 12 of 20
12. Question
1 pointsThe balancing of a rigid rotor can be achieved by appropriately placing balancing masses in
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Question 13 of 20
13. Question
1 pointsThe rotor of a ship rotates in clockwise direction when viewed from stern and the ship takes a left turn. The effect of gyroscopic couple acting on it will be
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Question 14 of 20
14. Question
1 pointsThe secondary unbalanced force is maximum __________ in one revolution of the crank.
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Question 15 of 20
15. Question
1 pointsA spring controlled governor is found unstable. It can be made stable by
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Question 16 of 20
16. Question
1 pointsIn order to double the period of a simple pendulum, the length of the string should be
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Question 17 of 20
17. Question
1 pointsWhen a rigid body is suspended vertically and it oscillates with a small amplitude under the action of the force of gravity, the body is known as
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Question 18 of 20
18. Question
1 pointsLongitudinal vibrations are said to occur when the particles of a body moves
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Question 19 of 20
19. Question
1 pointsIn Meyer’s expansion valve, the expansion valve is driven by an eccentric having an angle of advance from
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Question 20 of 20
20. Question
1 pointsIf the damping factor for a vibrating system is unity, then the system will be
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Theory of machines MCQ 3
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Question 1 of 20
1. Question
1 pointsWhen a point at the end of a link moves with constant angular velocity, its acceleration will have
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Question 2 of 20
2. Question
1 pointsIn a cam drive with uniform velocity follower, the sharp corners of the displacement diagram are rounded off at the beginning and at the end of each stroke. This is done
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Question 3 of 20
3. Question
1 pointsA governor is said to be stable, if the
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Question 4 of 20
4. Question
1 pointsWhich of the following statement is correct?
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Question 5 of 20
5. Question
1 pointsCritical damping is a function of
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Question 6 of 20
6. Question
1 pointsWhich of the following is used to control the speed variations of the engine caused by the fluctuations of the engine turning moment?
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Question 7 of 20
7. Question
1 pointsA Hartnell governor is a
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Question 8 of 20
8. Question
1 pointsFrequency of vibrations is usually expressed in
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Question 9 of 20
9. Question
1 pointsThe relation between number of pairs (p) forming a kinematic chain and the number of links (l) is
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Question 10 of 20
10. Question
1 pointshe cam follower generally used in air-craft engines is
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Question 11 of 20
11. Question
1 pointsIn a locomotive, the maximum magnitude of the unbalanced force along the perpendicular to the line of stroke, is known as
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Question 12 of 20
12. Question
1 pointsFor low and moderate speed engines, the cam follower should move with
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Question 13 of 20
13. Question
1 pointsA system in dynamic balance implies that
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Question 14 of 20
14. Question
1 pointsThe example of completely constrained motion is a
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Question 15 of 20
15. Question
1 pointsIn involute gears, the pressure angle is
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Question 16 of 20
16. Question
1 pointsA shaft carrying three rotors will have
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Question 17 of 20
17. Question
1 pointsThe minimum force required to slide a body of weight W on a rough horizontal plane is
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Question 18 of 20
18. Question
1 pointsIn a mechanism, the fixed instantaneous centres are those centres which
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Question 19 of 20
19. Question
1 pointsWhich of the following statements regarding laws governing the friction between dry surfaces are correct?
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Question 20 of 20
20. Question
1 pointsA combination of kinematic pairs, joined in such a way that the relative motion between the links is completely constrained, is called a
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Theory of machines MCQ 4
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Question 1 of 20
1. Question
1 pointsWhich of the following statement is correct for gears ?
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Question 2 of 20
2. Question
1 pointsIn a screw jack, the effort required to lift the load W is given by (where α = Helix angle, and φ = Angle of friction)
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Question 3 of 20
3. Question
1 pointsThe minimum number of teeth on the pinion which will mesh with any gear without interference for 20° full depth involute teeth will be
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Question 4 of 20
4. Question
1 pointsIn order to facilitate starting of locomotive in any position, the cranks of a locomotive with two cylinders, are placed at
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Question 5 of 20
5. Question
1 pointsThe coriolis component of acceleration leads the sliding velocity by
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Question 6 of 20
6. Question
1 pointsWhich of the following is a spring controlled governor?
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Question 7 of 20
7. Question
1 pointsAt the nodal point in a shaft, the amplitude for torsional vibration will be
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Question 8 of 20
8. Question
1 pointsWhen a body is subjected to transverse vibrations, the stress induced in a body will be
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Question 9 of 20
9. Question
1 pointsThe mechanism in which two are turning pairs and two are sliding pairs, is called a
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Question 10 of 20
10. Question
1 pointsIn a reciprocating engine, usually __________ of the reciprocating masses are balanced.
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Question 11 of 20
11. Question
1 pointsWhen there is a reduction in amplitude over every cycle of vibration, then the body is said to have
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Question 12 of 20
12. Question
1 pointsThe Klein’s diagram is useful to find
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Question 13 of 20
13. Question
1 pointsThe ratio of the number of teeth to the pitch circle diameter in millimetres, is called
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Question 14 of 20
14. Question
1 pointsThe rotating shafts tend to vibrate violently at whirling speeds because
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Question 15 of 20
15. Question
1 pointsWhich of the following is an inversion of a double slider crank chain?
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Question 16 of 20
16. Question
1 pointsThe unbalanced force due to revolving masses
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Question 17 of 20
17. Question
1 pointsIf the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then energy stored in the latter at the same speed will be
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Question 18 of 20
18. Question
1 pointsThe Grubler’s criterion for determining the degrees of freedom (n) of a mechanism having plane motion is (where l = Number of links, and j = Number of binary joints)
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Question 19 of 20
19. Question
1 pointsIn a Hartnell governor, if a spring of greater stiffness is used, then the governor will be
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Question 20 of 20
20. Question
1 pointsThe included angle for the V-belt is usually
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