Engineering MCQ Quiz Hub

1. Equation of continuity of flow is based on the principle of conservation of
mass
momentum
force
none of these.

2. Pick up the correct statement from the following :
Discharge over a triangular notch is proportional to H5/2
Discharge over a rectangular notch is proportional to H3/2
Both (a) and (b)
Neither (a) nor (b).

3. The flow in open channel is said to be subcritical if the Froude number is
less than 1.0
equal to 1.0
greater than 1.0
none

4. In C.G.S. system the unit of visocity is
dyne
joule
poise
newton

5. In steady flow, which one of the following changes with time
velocity
pressure
density
none of these.

6. The notch angle for maximum discharge over a triangular notch, is
30°
60°
90°
120°

7. In an inclined pipe, the pressure difference at its two ends is due to
sudden head drop at inlet
exit head drop
frictional loss head
all the above.

8. Weber number is the ratio of inertia force to
surface tension
gravitational force
elasticity
velocity

9. Though angle of deviation of liquid is more in internal mouth piece, the contraction of the jet, is
more in the internal mouth piece
less in the internal mouth piece
equal to external mouth piece
none of these.

10. The width of a weir with end contraction, is
equal to the width of the channel
less than the width of the channel
half the width of the channel
none of these.

11. An open container filled with water is moved vertically upward 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.

12. The gases are considered incompressible if Match number is
equal to 1.0
equal to 1.5
is more than 0.5
less than 0.2

13. The flow in which each liquid particle has a definite path and the paths of adjacent particles do not cross each other, is called
stream line flow
uniform flow
steady flow
turbulent flow.

14. The dimensionless parameter not applicable to flowing liquids, is
Reynold number
Weber number
Pressure coefficient
Kinematic viscosity

15. The pressure rise due to water hammer depends upon
the velocity of flow of water in the pipe
the length of pipe
time taken to close the valve
All of above.

16. In a two dimensional flow if the components of the velocity are u = ax ; v = by, the point where no motion occurs, is known as
critical point
neutral point
stagnation point
stationary point

17. Most economical section of a circular channel for maximum velocity, is if,
depth of water = 0.810 diameter
hydraulic mean depth = 0.304 diameter
wetted perimeter = 2.245 diameters
all the above.

18. For a most economical rectangular channel, the width of the channel must be
equal to depth of flow
twice the depth of flow
half the depth of flow
None of these.

19. The hydrostatic force acts through
centre of pressure
centre of top edge
centre of bottom edge
metacentre.

20. In an inclined position, a venturimeter records
more reading
less reading
same reading
none of these.

21. In a short cylindercial external mouthpiece, the venacontracta occurs at a distance from the outlet of orifice equal to
diameter of the orifice
one-fourth the diameter of the orifice
one-third the diameter of the orifice
two-third the diameter of the orifice

22. If the pressure at the inlet of a pipe is 90 kg/cm2 and pressure drop over the pipe line is 10 kg/cm2, the efficiency of transmission, is
66.60%
77.70%
55.50%
88.8%.

23. Pick up the incorrect statement from to following regarding triangular notch :
For measuring low discharge, it gives more accurate result
Only one reading (i.e. H) is required for computation of discharge
Ventilation is necessary
None of these.

24. The flow in a channel is said to be non-uniform, if
free water surface of an open channel is not parallel to the bed of channel
head needed to overcome frictional reistance is less than the drop in elevation of channel bed
head needed to overcome frictional resistance is more than the drop in elevation of channel bed
all the above.

25. Flow net' can be drawn only if the flow is
turbulent
rotational
distortion
none of these.

26. The flow in open channel is laminar if the Reynold number is
less than 500
more than 500
1000
none of these.

27. Centre of buoyancy is
centroid of the floating body
centroid of the fluid displaced
centre of pressure of the displaced liquid
none of these.

28. The intensity of pressure due to sudden closure of a valve of a pipe in which water flows with velocity v, is directly proportional to :
square root of the bulk modulus of elasticity of water
bulk modulus of elasticity of water
specific weight of water
none of these.

29. Total energy line is
pressure head
datum head
kinetic head
All the above.

30. For critical flow, the Froude number is :
1
. less than 1.0
more than 1.0
2

31. A stepped notch is a combination of
rectangular notches of different sizes
triangular notches of different sizes
rectangular and triangular notches
all the above.

32. The centre of pressure of a vertical plane immersed in a liquid is at
centre of higher edge
centre of lower edge
centroid of the area
none of these.

33. A body of dimensions 1.5 m x 1.0 m x 2 m weighs 3000 kg in water. Its specific gravity is
0.8
0.9
1
1.1

34. An orifice is called a large orifice if water head, is
twice the diameter of the orifice
thrice the diameter of the orifice
four times the diameter of the orifice
five times the diameter of the orifice.

35. When a liquid rotates at constant angular velocity about a vertical axis of a rigid body, the pressure
increases linearly to its radial distance
varies inversely as the altitude along any vertical line
varies as the square of the radial distance
. decreases as the square of the radial distance

36. For the two dimensional flow, the stream function is given by ψ = 2xy. The velocity at a point (3, 4) is
6 m/sec
8 m/sec
10 m/sec
12 m/sec

37. A floating body attains stable equilibrium if its metacentre is
at the centroid
above the centroid
below the centroid
anywhere.

38. The unit of the viscosity is
kg sec/m2
Newton sec per m2
Newton-sec2/m3
m2 per sec.