Practice Test: Question Set - 34
1. When the body is suspended at the point of suspension, its periodic time and frequency will be ________ as compared to the body suspended at the point of percussion.
- (A) Same
- (B) Two times
- (C) Four times
- (D) None of
these
2. An exact straight line motion mechanism is a
- (A) Scott-Russell's
mechanism
- (B) Hart's
mechanism
- (C) Peaucellier's
mechanism
- (D) All
of these
3. The equation of free vibrations of a system is (d²x/dt²) +36 π²x, its natural frequency is
- (A) 3 Hz
- (B) 3π Hz
- (C) 6 Hz
- (D) 6π Hz
4. The cam follower generally used in automobile engines is
- (A) Knife
edge follower
- (B) Flat
faced follower
- (C) Spherical
faced follower
- (D) Roller
follower
5. Which gear train is used for higher velocity ratios in a small space?
- (A) Simple gear train
- (B) Compound gear train
- (C) Reverted gear train
- (D) Epicyclic gear train
6. Hammer blow
- (A) Is the maximum horizontal unbalanced force
caused by the mass provided to balance the reciprocating masses.
- (B) Is the maximum vertical unbalanced force caused by
the mass added to balance the reciprocating masses
- (C) Varies as the square root of the speed
- (D) Varies inversely with the square of the speed
7. A ball and a socket forms a
- (A) Turning pair
- (B) Rolling pair
- (C) Screw pair
- (D) Spherical pair
8. The natural frequency of free longitudinal vibrations is equal to (where m = Mass of the body, s = Stiffness of the body, and δ = Static deflection of the body)
- (A) 1/2π
× √(s/m)
- (B) 1/2π × √(g/δ)
- (C) 0.4985/√δ
- (D) Any one of
these
9. A Hartnell governor is a
- (A) Dead weight
governor
- (B) Pendulum
type governor
- (C) Spring
loaded governor
- (D) Inertia
governor
10. The D-slide valve is also known as
- (A) Inside
admission valve
- (B) Outside
admission valve
- (C) Piston slide
valve
- (D) None of
these
11. With usual notations for different parameters involved, the maximum fluctuations of energy for a flywheel is given by
- (A) 2ECS
- (B) EC S/2
- (C) 2ECS²
- (D) 2E²CS
12. In Meyer's expansion valve, the main valve is driven by an eccentric having an angle of advance from
- (A) 10°-15°
- (B) 15°-25°
- (C) 25°-30°
- (D) 30°-40°
13. Which of the following statement is wrong?
- (A) The difference
between the maximum and minimum energies is called maximum fluctuation of
energy
- (B) The
coefficient of fluctuation of speed is the ratio of maximum fluctuation of
speed to the mean speed
- (C) The
variations of energy above and below the mean resisting torque line is known as
fluctuation of energy
- (D) None
of the above
14. A body of weight W is required to move up the rough inclined plane whose angle of inclination with the horizontal is α. The effort applied parallel to the plane is given by (where μ = tan φ = Coefficient of friction between the plane and the body)
- (A) P = W
tan α
- (B) P = W
tan (α + φ)
- (C) P = W
(sin α + μ cos α)
- (D) P = W
(cos α + μ sin α)
15. Which of the following is an open pair?
- (A) Journal bearing
- (B) Ball and Socket joint
- (C) Leave screw and nut
- (D) None of the above
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