IES Civil Service Pre. Entrance Test

IES Civil Service  Pre. Entrance Test

Engineering Solved Question Paper

1. The magnitude of acceleration is given by the

(a) Slope of distance time curve

(b) Length of velocity time curve

(c) Slope of velocity time curve

(d) Length of distance time curve

ANSWER:(c)

2. A heavy ladder resting on floor 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 rough

(c) Both floor and wall are rough

(d) Both floor and wall are smooth.

ANSWER:(d)

3. The angular speed of a car while taking a circular turn of radius 100 m at 36 km/hr is

(a) 0.1 radian/sec

(b) 1 radian/sec

(c) 100 radians/sec

(d) 1000 radians/sec

ANSWER:(a)

3. Instantaneous centre is at intensity when the angular velocity is

(a) Constant

(b) Zero

(c) Maximum

(d) Minimum

ANSWER:(b)

4. Ratio of the speed of a rolling cylinder to the speed of sliding cylinder is

(a) Less than 1

(b) Equal to 1

(c) Between 1 and 2

(d) Greater than 2

ANSWER:(a)

5. Two perfectly elastic spheres of equal mass moving in the same direction with their velocities

in the ratio 2 : 1 have an impact. After the impact  they will

(a) Move in the same direction with the same velocity ratio.

(b) Have a velocity ratio of 1:12

(c) Move in opposite directions with a velocity ratio 1:2

(d) Move in the same direction with a velocity ratio 1:2

ANSWER:(d)

6. Engineer's unit of force is

(a) Newton in absolute unit

(b) Dyne in absolute unit

(c) Newton and Dyne in absolute unit

(d) All the above

ANSWER:(a)

7. A seconds pendulum executes

(a) 0.5 beat/sec.

(b) 1.0 beat/sec

(c) 2.0 beats/sec

(d) 2.5 beats/sec.

ANSWER:(c)

8. The path traced by a projectile in the sky is

(a) Circular

(b) Parabolic

(c) Elliptical

(d) Catenaries

ANSWER:(b)

9. To double the period of oscillation of simple Pendulum

(a) The mass of its bob should be doubled

(b) The mass of its bob should be quadrupled

(c) Its length should be quadrupled

(d) Its length should be doubled

ANSWER:(c)

10. P is the force acting on a body whose mass is m

and acceleration is F. The equation P-mf = 0, is known as

(a) Equation of dynamics

(b) Equation of dynamic equilibrium

(c) Equation of statics

(d) None of these

ANSWER:(a)

11. The length of a second’s pendulum is

(a) 99.0 cm

(b) 99.4 cm

(c) 100 cm

(d) 101.10 cm

 ANSWER:(b)

 12. In SI unit, the unit of force and energy respectively, are

(a) Newton and Watt

(b) Dyne and erg

(c) Newton and Joule

(d) Kg-wt and Joule

ANSWER:(c)

13. Pendulum A has length l and pendulum B has length 4l.

The periodic time of pendulums A and  B will be in the ratio of

(a) 1:0.5

(b) 1:1

(c) 1:2

(d) 1:4

ANSWER:(c)

14. Which of the following is a scalar quantity?

(a) Energy

(b) Momentum

(c) Torque

(d) Impulse

 ANSWER:(a)

15. Two ships A and B leave a port at the same

time. The ship A moving north at 30 km/h and

the ship B moving eastwards at 40 km/hr. The

speed of B relative to A is

(a) 70 km/hr

(b) 35 km/hr

(c) 10 km/hr

(d) 50 km/hr

ANSWER:(d)

Q.16. The shear stress distribution for a fluid flowing

in between the parallel plates, both at rest, is

(a)    Constant over the cross-section

(b)   Maximum at the mid-plane and varies linearly with distance from mid-plane

(c) Zero at the mid-point and varies linearly with distance from mid-plane

(d) Zero at the plates and varies exponentially to mid-point

ANSWER: (c)

Q.17. An imaginary curve drawn through a flowing

fluid in such a way that the tangent to it at any point

gives the direction of velocity of flow at that point,

is known as

(a) Flow-contour

(b) Line of flow

(c) Path line

(d) Streamline

ANSWER: (d)

Q.18. The losses are maximum in

(a) Laminar flow

(b) Turbulent flow

(c) Critical flow

(d) Transition flow

ANSWER: (b)

Q.19. The equation of continuity holds good when the flow

(a) Is steady

(b) Is one dimensional

(c) Velocity is uniform at all the cross sections

(d) All of the above

ANSWER: (c)

Q.20. The continuity equation

(a) Is based on Bernoulli’s theorem

(b) Expresses relation between work and energy

(c) Expresses relation between hydraulic parameters of flow

(d) Relates the mass rate of flow along a streamline

ANSWER: (a)

Q.21. The horizontal component of force on a curved surface is equal to the

(a)    Product of pressure at its centre and area

(b) Weight of liquid retained by the curved area

(c) Force on a vertical projection of the curved surface

(d) Weight of liquid vertically above the curved surface

ANSWER: (c)

Q.22. Capillarity is due to

(a) Cohension

(b) Adhesion

(c) Adhesion and cohesion

(d) Gravity

ANSWER: (c)

Q.23. In a venturimeter, length of divergent cone as

compared to the length of convergent cone is

(a) Same

(b) Half

(c) More

(d) less

ANSWER: (b)

Q.24. Cavitations will begin when

(a) Pressure at any location reaches pressure

equal to the saturated vapour pressure of the liquid

(b) Pressure becomes more than critical pressure

(c) Flow is increased

(d) Pressure is increased

ANSWER: (d)

Q.25. Head loss in turbulent flow in a pipe

(a) Varies directly as velocity

(b) Varies inversely as square of velocity

(c) Varies approximately as square of velocity

(d) Varies inversely as velocity.

ANSWER: (d)