Theory of Machines objective questions with answers part4

Q1. Open pairs are those which have
(A) point or line contact between the two elements when in motion
(B) surface contact between the two ele-ments when in motion
(C) elements of pairs not held together mechanically
(D) two elements that permit relative motion

Q2. The approximate straight line mechanism is a
(A) 4 bar linkage
(B) 6 bar linkage
(C) 8 bar linkage
(D) 3 bar linkage

Q3. A cam with a roller follower would con stitute following type of pair
(A) lower pair
(B) higher pair
(C) open pair
(D) close pair

Q4. A cam mechanism imparts following motion
(A) rotating
(B) oscillating
(C) reciprocating
(D) All of these

Q5. Higher pairs are those which have
(A) point or line contact between the two elements when in motion
(B) surface contact between the two ele-ments when in motion
(C) elements of pairs not held together mechanically
(D) two elements that permit relative motion

Q6. If the opposite links of a four bar linkage are equal, the links will always form a
(A) triangle
(B) rectangle
(C) parallelogram
(D) pentagon

Q7. Kinematic pairs are those which have
(A) point or line contact between the two elements when in motion
(B) surface contact between the two elements when in motion
(C) elements of pairs not held together mechanically
(D) two elements that permit relative motion

Q8. A pantograph is a mechanism with
(A) lower pairs
(B) higher pairs
(C) turning pairs
(D) spherical pairs

Q9. A point on a link connecting double slider crank chain traces a
(A) straight line
(B) parabola
(C) hyperbola
(D) ellipse

Q10. Lower pairs are those which have
(A) point or line contact between the two elements when in motion
(B) surface contact between the two elements when in motion
(C) elements of pairs not -held together mechanically
(D) two elements that permit relative motion

Q11. Typewriter constitutes
(A) machine
(B) structure
(C) mechanism
(D) inversion

Q12. If D1 and D2 be the diameters of driver and driven pulleys, then belt speed is proportional to
(A) D1+D2
(B) D2/D1
(C) D1-D2.
(D) D1

Q13. Which of the following is false statement in respect of differences between machine and structure
(A) Machines transmit mechanical work, whereas structures transmit forces
(B) In machines, relative motion exists be-tween its members, whereas same does hot exist in case of structures
(C) Machines modify movement and work, whereas structures modify forces
(D) Efficiency of machines as well as structures is below 100%

Q14. To obviate axial thrust, following gear drive is used
(A) double helical gears having opposite teeth
(B) double helical gears having identical teeth
(C) single helical gear in which one of the teeth of helix angle a is more
(D) mutter gears

Q15. Throw of a cam is the maximum distance of the follower from
(A) base circle
(B) pitch circle
(C) root circle
(D) prime circle

Q16. To transmit power from one rotating shaft to another whose axes are neither parallel nor intersecting, use
(A) spur gear
(B) spiral gear
(C) bevel gear
(D) worm gear

Q17. The locus of a point on a thread unwound from a cylinder will be
(A) a straight line
(B) a circle
(C) involute
(D) helix.

Q18. The horse power transmitted by a belt is dependent upon
(A) tension on tight side of belt
(B) radius of pulley
(C) speed of pulley
(D) all of these

Q19. Creep in belt drive is due to
(A) material of the pulley
(B) material of the belt
(C) larger size of the driver pulley
(D) uneven extensions and contractions due to varying tension

Q20. The moment on the pulley which produces rotation is called
(A) inertia
(B) momentum
(C) moment of momentum
(D) torque