Engineering MCQ Quiz Hub

1. For exerting a pressure of 4.8 kg/cm2, the depth of oil (specific gravity 0.8), should be
60 cm
56 cm
40 cm
41 cm

2. For the flow of liquid from an open ended tube (or nozzle) leading to the formation of spray of liquid drops, the number generally applied, is
Froude number
Weber number
Reynold number
Mach number.

3. To avoid vapourisation, pipe lines are laid over the ridge so that these are above the hydraulic gradient line, not more than
2.4 m
6.4 m
10.0 m
5.0 m

4. A jet projected at an angle of 45θ, 40 m from the foot of a vertical column, just reaches the top of the column. The height of the column is
15 m
20 m
30 m
40 m

5. Atmospheric pressure varies with
altitude
temperature
weather conditions
all of the above.

6. The magnitude of water hammer in a pipe depends upon
speed at which value is closed
length of the pipe line
elastic properties of the following liquid
all the above

7. If velocities of fluid particles vary from point to point in magnitude and direction, as well as from instant to instant, the flow is said to be
laminar
turbulent flow
uniform flow
non-uniform flow.

8. The rise of the liquid along the walls of a revolving cylinder above the initial level, is
greater than the depression of the liquid at the axis of rotation
lesser than the depression of the liquid at the axis of rotation
the same as the depression of the liquid at the axis of rotation
none of these.

9. Fluids change the volume under external presssure due to
plasticity
viscosity
compressibility
none of these.

10. Discharge over an ogee weir remains the same as that of
sharp crested weir
triangular weir
cippoletti weir
drowned weir.

11. When no air is left below the nappe and water stream adheres to the down stream face of the weir, it is known as
free nappe
depressed nappe
clinging nappe
none of these.

12. The best side slope for most economical trapezoidal section, is
30°
45°
60°
none of these.

13. The following is not a laminar flow
Flow of oil in measuring instruments
Flow in beds in ground water
Rise of water in plants through roots
Flow in water pipe lines.

14. Which one of the following statements is true ?
The value of kinetic energy correction factor for turbulent flow lies between 1.03 to 1.06
The value of kinetic energy correction factor for laminar flow is 2
The practical value of kinetic energy correction factor for turbulent flow is unity
all the above.

15. Uniform flow is said to occur when
size and shape of the cross-section in a particular length remain constant
size and shape of the cross-section change along a length
frictional loss in the particular length of the channel will the more than the drop in its elevation
frictional loss in the particular length of the channel, will be less than the drop in elevation.

16. Molecules of fluids get attracted due to
capillarity action
surface tension
adhesion
cohesion

17. Cappoletti weir is a
rectangular weir whose length is kept 3 times the height of the water above sill
triangular weir whose notch angle is 90°
trapezoidal weir, whose sides slope 1 horizontal to 2 verticals
a combination of rectangular and triangular weirs.

18. On an inclined plane, centre of pressure is located
at the centroid
above the centroid
below the centroid
anywhere.

19. Atmospheric pressure is equal to water column head of
9.81 m
5.0 m
10.30 m
7.5 m.

20. Shear stress is directly proportional to
the velocity
the shear strain
the viscosity
the velocity.

21. To avoid an interruption in the flow of a syphon, an air vessel is provided
at the inlet
at the outlet
at the summit
at any point between intet and outlet.

22. Pick up the correct statement from the following :
Total energy gradient is the graphical representation of the total head at any section of a pipe line
Vertical distance between the total energy line and hydraulic grade line is equal to the velocity head
Vertical distance between the total energy line and total energy gradient represents loss of head
all the above.

23. A fluid particle may possess the displacement of
translation
rotation
distortion
all the above.

24. Pick up the correct statement from the following :
When the length of the tube is equal to diameter of the internal mouth piece, the jet of liquid comes out without touching the sides of the tube
When the length of the tube is three times the diameter of the internal mouth piece, the jet diameter is equal to diameter of the tube.
both (a) and (b)
Neither (a) nor (b).

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

26. Most economical section of a triangular channel, is
equilateral triangle
right angled triangle
isosceles triangle with 45° vertex angle
right angled triangle with equal sides.

27. In an open tube, free surface of mercury remains
horizontal
curved upwards
curved downwards
none of these.

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

29. For maximum horse power of a nozzle, the head supplied must be equal to
head loss in the pipe due to friction
twice the head loss in the pipe due to friction
thrice the head loss in the pipe due to friction
four times the head loss in the pipe due to friction.

30. The ratio of frictional factor and coefficient of friction used in general equation for a head loss in a pipe, is A. 1
1
2
3
4

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

32. Back water curve is caused if
friction head loss is more than the bed slope
pressure is due to weir in the channel
there is an increase in width of the channel
none of these.

33. Power transmitted through a pipe is maximum when friction head loss, is
one-half of the total head supplied
one-third of the total head supplied
one-fouth of the total head supplied
equal to the total head supplied.

34. The specific weight of water is 1000 kg/m3
at normal pressure of 760 mm
at 4°C temperature
at mean sea level
all the above.

35. Specific weight of liquid
remains constant at every place
does not remain constant at every place
varies from place to place on the earth
does not vary on any other planet.

36. Manning's formula is used for
flow in open channels
head loss due to friction in open channels
head loss due to friction in pipes flowing full
flow in pipes.

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

38. An ideal fluid is
incompressible
compressible
compressible and non-viscous
slightly affected by surface torque.