Engineering MCQ Quiz Hub

1. An ideal fluid
is frictionless and incompressible
obeys Newton's law of velocity
is similar to gas
is very viscous.

2. In C.G.S. system the units of kinematic viscosity, is
stoke
poise
Newton
none of these.

3. A triangular notch is preferred to a rectangular notch because
only one reading is required
its formula is simple to remember
it gives more accurate results for low discharge
all the above.

4. In case of laminar flow through a circular pipe,
momentum correction factor is 1.33
energy correction factor is 2.00
both (a) and (b)
Neither (a) nor (b).

5. The pressure less than atmospheric , pressure, is known
suction pressure
vacuum pressure
negative gauge pressure
all the above.

6. A rise or fall of liquid in a glass tube of a very small diameter when dipped is
directly proportional to the force per unit length of periphery
direcly proportional to the sine of the angle of contact
directly proportional to the specific weight of liquid
inversely proportional to the diameter of the glass tube.

7. To measure very low pressure, we use
barometers
piezometers
manometers
differential manometers.

8. A spherical load 900 kg is rolled through 9.8 m across the deck of a ship weighing 10, 000 kg. If the metacentric height of the ship is 5 metres, the angle of heel, is
10° 5'
10° 10'
10° 15'
10° 20'

9. Pick up the correct statement from the following :
In incompressible flow the density of a fluid remains constant
In compressible flow, the density of a fluid changes from point to point
In uniform flow, the velocity of a fluid does not change with respect to length of flow direction
All the above.

10. Pick up the incorrect statement from the following :
In radial flow, fluid flows such that pressure and velocity at any point change with respect to its distance from the central axis
In radial flow, velocity of flow is in a radial direction
In radial flow, flow may take place radially inward to or outward from the centre
In radial flow, flow is one dimensional with stream lines parallel.

11. Chezy's formula is used to determine
head loss due to friction in pipe
velocity of flow in pipe
velocity of flow in open channels
none of these.

12. The metacentric height of a body equals the distance between
the centre of gravity and centre of buoyancy
the metacentre and centre of gravity
the centre of buoyancy and metacentre
none of these.

13. Discharge through a totally submerged orifice, is directly proportional to
difference in elevation of water surfaces
square root of the difference in elevation of water surface
square root of the opening
reciprocal of the area of the opening

14. Frictional loss of head includes the loss of energy due to
viscosity
turbulence
both (a) and (b)
none of these.

15. The length of hydraulic jump is roughly
2 to 3 times its height
3 to 5 times its height
5 to 7 times its height
none of these.

16. To ensure that water does not rise more than 100 cm above the crest, for a discharge of 5.00 m3/sec, the length of water will be
2.48 m
2.49 m
2.50 m
2.51 m

17. For a most economical trapezoidal open channel, the half of the top width must be equal to
the bed width
one sloping side
the depth of flow
None of these.

18. Pick up the correct statement regarding convergent divergent mouth piece from the following :
It converges upto Venacontracta and then diverges
In this mouth piece there is no loss of energy due to sudden enlargement
The coefficient of discharge is unity
All the above.

19. The value of kinetic energy correction factor (a) for a laminar flow through a circular pipe, is
0.5
1
1.5
2

20. One metric slug is equal to
1 kg wt
9.81 kg wt
9.81 kg mass
0.98 kg wt.

21. Falling drops of water become spheres due to
adhesion
cohesion
surface tension
viscosity.

22. The most efficient channel section, is
semi-circular
rectangular
triangular
half hexagon in the form of trapezoid.

23. With a clinging nappe of a weir, the excess discharge, is
6% to 7%
8% to 10%
18% to 20%
25% to 30%

24. For steady flow in open channels, which one of the following does not change :
depth of flow
velocity of flow
rate of flow
All of these.

25. Equation of continuity of fluids is applicable only if
flow is steady
flow is compressive
flow is one dimensional
all the above.

26. The flow in open channel is said to be critical if the Froude number is :
less than 1.0
equal to 1.0
greater than 1.0
None of these.

27. An orifice is an opening in a vessel with
closed perimeter of regular shape through which water flows
the water level of the liquid on the up stream side is below the top of the orifice
partially full flow
prolonged sides having length of 2 to 3 diameters of the opening in thick wall.

28. The imaginary line drawn such that the tangents at its all points indicate the direction of the velocity of the fluid particles at each point, is called
path line
stream line
potential line
streak line.

29. A nozzle is fitted at the end of a pipe whose length is 320 m and diameter is 10 cm. If the value of f = 0.01, the diameter of the nozzle for the maximum transmission of power through the nozzle is
2.4 cm
2.5 cm
2.6 cm
2.7 cm

30. When the whole fluid mass rotates either due to fluid pressure or gravity or rotation previously imparted, the motion is known as
free vortex
forced vortex
non-potential vortex
rotational vortex.

31. For solving the problems is hydraulic engineering, the velocity used is
velocity at the centre of pipe section
average velocity of flow over a section
mean of the velocities at the centre and that along the pipe surface
none of these.

32. The shape of fire hose nozzle is generally kept
divergent
convergent
convergent divergent
cylindrical.

33. The line joining the points to which the liquid rises in vertical piezometer tubes fitted at different cross-sections of a conduit, is known as
hydraulic gradient
piezometric line
pressure grade line
all the above.

34. Practical fluids possess
viscosity
surface tension
compressibility
all the above.

35. The depth of the centre of pressure on a vertical rectangular gate (4 m wide, 3 m high) with water upto top surface, is
1.0 m
1.5 m
2.0 m
2.5 m

36. The differential equation dp/ρ + gdz + vdv = 0 for a fluid motion is suggested by
Bernoulli
Cauchy-Riemann
Laplace
Leonard Euler.

37. An open container filled with water is moved vertically downward with a uniform linear acceleration. The pressure at its bottom will be
greater than static pressure
equal to static pressure
lesser than static pressure
none of these.

38. For uniform flow in canals
there is a balance between the frictional loss and drop in elevation of the channel
bed and free water surfaces of a channel are parallel to each other
bed of channel represents the hydraulic gradient
all the above.

39. If H is height of the liquid above the sill, the effect of end contractions, according to Francis formula, is
0.1 H
0.2 H
0.3 H
0.4 H

40. Pick up the correct statement from the following :
For maximum velocity of flow, the depth of water in the circular channel must be 0.81 times the diameter of the channel
For maximum velocity, the hydraulic mean depth must be 0.3 times the diameter of circular channel
For maximum discharge the depth of flow must be 0.95 times the diameter of circular channel
All the above.