Engineering MCQ Quiz Hub

1. Liquids
cannot be compressed
do not occupy definite shape
are not affected by change in pressure and temperature
none of these.

2. The ratio of the inertia and gravitational force acting in any flow, ignoring other forces, is called
Euler number
Frode number
Reynold number
Weber number.

3. Non-over flow double curvature concrete arch, is provided in
Bhakra dam
Hirakund dam
Nagarjuna Sagar dam
Idukki dam.

4. For the most economical trapezoidal open channel,
half of the top width must be equal to one of the sloping sides
the hydraulic mean depth must be equal to half the depth of flow
the semicircle drawn with top width as diameter must touch the three sides of the channel
All of these.

5. Hydraulic ram is a device
for lifting water without an electric motor
for accelerating water flow
for lifting heavy loads
none of these.

6. Gauge pressure is
absolute pressure - atmospheric pressure
absolute pressure + atmospheric pressure
atmospheric pressure - absolute pressure
none of these.

7. If jet of water coming out from a nozzle with a velocity 9.81 m/s, the angle of elevation being 30°, the time to reach the highest point is
0.25 s
0.50 s
1.0 s
1.5 s.

8. The discharge through a 100 mm diameter external mouth piece fitted to the side of a large vessel is 0.05948 m3/s. The head over the mouth piece is
2 m
2.5 m
3.0 m
4.0 m.

9. If cohesion between the molecules of a fluid is more than adhesion between the fluid and glass, the free level of fluid in a dipped glass tube will be
higher than the surface of liquid
same as the surface of liquid
lower than the surface of liquid
none of these.

10. The continuity equation
expresses the relationship between work and energy
relates the momentum per unit volume between two points on a stream line
relates mass rate of flow along a stream line
requires that Newton's second law of motion be satisfied at every point in fluid.

11. In pipe lines, a surge tank is provided
to relieve the pressure due to water hammer
to provide additional water head
to overflow the pipe line when suddenly closed
to remove the frictional loss in pipe.

12. Total head of a liquid particle in motion is the sum of
potential head and kinetic head
kinetic head and pressure head
potential head and pressure head
potential head, kinetic head and pressure head.

13. The velocity distribution of viscous fluid through a circular/pipe is :
hyperbolic
circular
parabolic
elliptical.

14. Mercury is generally used in barometers because
its vaour pressure is practically zero
the height of the barometer will be less
it is a best liquid
both (a) and (b) above

15. Flow in pipes is laminar if Reynold number is
less than 2100
more than 3000
between 2100 and 3000
none of these.

16. In flow, the liquid particles may possess
potential energy
kinetic energy
pressure energy
all the above.

17. Euler's equation for the motion of liquids assumes that
fluid is viscous
fluid is homogeneous and incompressible
velocity of flow is non-uniform over the section
flow is unsteady along the stream line.

18. The height of water level in a tank above the centre of a circular hole 2.5 cm in diameter is 50 m. The velocity of water flowing through the hole, is
31.1 m/sec
31.2 m/sec
31.3 m/sec
31.4 m/sec.

19. A steady uniform flow is through
a long pipe at decreasing rate
a long pipe at constant rate
an expanding tube at constant rate
an expanding tube at increasing rate

20. Cavitation is caused by
Low pressure
High pressure
Low velocity
High velocity

21. Mach number is the ratio of inertia force to
viscosity
surface tension
gravitational force
elasticity.

22. The main assumption of Bernoulli's equation is :
The velocity of energy of liquid particle, across any cross-section of a pipe is uniform
No external force except the gravity acts on the liquid
There is no loss of energy of the liquid while flowing
All the above.

23. For critical depth of flow of water in open channels, fc the specific energy must be :
minimum
maximum
average of maximum and minimum
None of these.

24. Kinematic viscosity of liquids by equation is determined by :
Redwood viscometer
Engler viscometer
Saybolt universal viscometer
None of these.

25. If the forces are due to inertia and gravity, and frictional resistance plays only a minor role, the design of the channels is made by comparing
Reynold number
Froude number
Weber number
Mach number.

26. The velocity of the fluid particle at the centre of the pipe section, is
minimum
maximum
equal throughout
none of these.

27. Due to decrease of diameter of the droplet, inside pressure intensity
increases
decreases
remains unaffected
None of these.

28. In order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be
2 mm
4 mm
6 mm
10 mm

29. When water flows over a rectangular suppressed weir, the negative pressure created beneath the nappe
increases the discharge
decreases the discharge
does not effect the discharge
none of these.

30. Barometres are used to measure
pressure in water channels, pipes etc.
difference in pressure at two points
atmospheric pressure
very low pressure

31. For most economical rectangular section of a channel, the depth is kept
one-fourth of the width
three times the hydraulic radius
half the width
hydraulic mean depth

32. In a centrifugual pump casing, the flow of water leaving the impeller, is
rectilinear flow
radial flow
free vortex motion
forced vertex.

33. In fluids, steady flow occurs when
conditions of flow change steadily with time
conditions of flow do not change with time at a point
conditions of flow remain the same at adjacent point
velocity vector remains constant at a point.

34. From a nozzle exposed to atmosphere, the liquid jet traverses
a straight line
a circular path
an elliptical path
a parabolic path.

35. To avoid the force of surface tension in an inclined manometer, the minimum angle of inclination is
2°
3°
4°
5°