# Practice Test: Question Set - 01

**1. Select the correct statement**

- (A) The body centrode rolls on the space
centrode

- (B) The space centrode rolls on the body
centrode

- (C) Both body and space centrodes may role on each
other

- (D) The body centrode never touches space centrode

**2. The following is in unstable equilibrium**

- (A) A uniform solid cone resting on a generator on a
smooth horizontal plane

- (B) A uniform solid cone resting on its base on a
horizontal plane

- (C) A solid cube resting on one edge

- (D) A satellite encircling the earth

**3. In a lifting machine with efficiency 60%, an effort of 200 N is required to raise a load of 6 kN. The velocity ratio of the machine is**

- (A) 30

- (B) 50

- (C) 60

- (D) 80

**4. The member forces in a statically in determinate truss**

- (A) Can be obtained by graphic statics

- (B) Cannot be obtained by graphic statics

- (C) May be obtained by graphic statics

- (D) Can be obtained by graphic statics by trial
and error

**5. A ball moving on a smooth horizontal table hits a rough vertical wall, the coefficient of restitution between ball and wall being 1/3. The ball rebounds at the same angle. The fraction of its kinetic energy lost is**

- (A) 1/3

- (B) 2/3

- (C) 1/9

- (D) 8/9

**6. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium if**

- (A) Floor is smooth and wall is rough

- (B) Floor is rough and wall is smooth

- (C) Both floor and wall are rough

- (D) Both floor and wall are smooth

**7. The maximum displacement of a particle executing S.H.M. corresponds to**

- (A) Zero potential energy and maximum kinetic
energy

- (B) Zero kinetic energy and maximum potential
energy

- (C) Maximum kinetic energy and maximum potential energy

- (D) Minimum kinetic energy and minimum potential energy

**8. A sphere and a cylinder having the same mass and radii start from rest and roll down the same inclined plane. Which body gets to the bottom first?**

- (A) Sphere with greater rotational energy at bottom
than cylinder

- (B) Sphere with lesser rotational energy at
bottom than cylinder

- (C) Cylinder with greater rotational energy at bottom
than sphere

- (D) Both reach the bottom simultaneously with equal
rotational energy at bottom

**9. When a circular wheel rolls on a straight track, then the shape of body centrode and space centrode respectively are**

- (A) Straight line and parabola

- (B) Straight line and circle

- (C) Circle and straight line

- (D) Circle and parabola

**10. The time period of a simple pendulum depends on**

**(i) Mass of suspended particle**

**(ii) Length of the pendulum**

**(iii) Acceleration due to gravity**

**The correct answer is**

- (A) Only (i)

- (B) Both (ii) and (iii)

- (C) Both (i) and (iii)

- (D) All are correct

**11. A light rope is loaded with many equal weights at equal horizontal intervals. The points of suspension on the rope lie on a**

- (A) Parabola

- (B) Catenary

- (C) Cycloid

- (D) Ellipse

**12. Free body diagram is an**

- (A) Isolated joint with only body forces acting
on it

- (B) Isolated joint with internal forces acting
on it

- (C) Isolated joint with all the forces, internal
as well as external, acting on it

- (D) None of the above

**13. The graphical method of determining the forces in the members of a truss is based on**

- (A) Method of joint

- (B) Method of section

- (C) Either method

- (D) None of the two methods

**14. In which of the following trusses, the method of substitution is required for determining the forces in all the members of the truss by graphic statics?**

- (A) Howe truss

- (B) King post truss

- (C) Fink truss

- (D) Warren truss

**15. If the direction of projection bisects the angle between the vertical and the inclined plane, then the range of projectile on the inclined plane is**

- (A) Zero

- (B) Maximum

- (C) Minimum

- (D) None of these

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