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# Solve these Hydraulics Questions

Question No 1: A triangular notch is preferred to a rectangular notch because…

A: Only one reading is required

B: Its formula is simple to remember

C: It gives more accurate results for low discharge

D: It measures a wide range of flows accurately

E: All of the above

Question No 2: In C.G.S. system the units of kinematic viscosity, is…

A: Stoke

B: Poise

C: Newton

D: None of these

Question No 3: An ideal fluid….

A: Is frictionless and incompressible

B: Obeys Newton’s law of velocity

C: Is similar to gas

D: Is very viscous

Question No 4: In case of laminar flow through a circular pipe….

A: Momentum correction factor is 1.33

B: Energy correction factor is 2.00

C: Both (a) and (b)

D: Neither (a) nor (b)

Question No 5: The pressure less than atmospheric, pressure is known…..

A: Suction pressure

B: Vacuum pressure

C: Negative gauge pressure

D: All of the above

Question No 6: A rise or fall of liquid in a glass tube of a very small diameter when  dipped is….

A: Directly proportional to the force per unit length of periphery

B: Directly proportional to the sine of the angle of contact

C: Directly proportional to the specific weight of liquid

D: Inversely proportional to the diameter of the glass tube

Question No 7: To measure very low pressure, we use….

A: Barometers

B: Piezometers

C: Manometers

D: Differential manometers

Question No 8: Pick up the correct statement from the following….

A: In incompressible flow the density of a fluid remains constant

B: In compressible flow, the density of a fluid changes from point to point

C: In uniform flow, the velocity of a fluid does not change with respect to length of flow direction.

D: All of the above

Question No 9: Pick up the incorrect statement from the following…..

A: In radial flow, fluid flows such that pressure and velocity at any point change with respect to its distance from the central axis.

B: In radial flow, velocity of flow is in a radial direction

C: In radial flow, flow may take place radially inward to or outward from the centre

D: In radial flow, flow is one dimensional with stream lines parallel.

Question No 10: Discharge through a totally submerged orifice, is directly proportional to….

A: Difference in elevation of water surfaces

B: Square root of the difference in elevation of water surface

C: Square root of the opening

D: Reciprocal of the area of the opening

E: None of these

Question No 11: The metacentric height of a body equals the distance between…..

A: The centre of gravity and centre of buoyancy

B: The metacentre and centre of gravity

C: The centre of buoyancy and metacentre

D: None of these

Question No 12: Chezy’s formula is used to determine….

A: Head loss due to friction in pipe

B: Velocity of flow in pipe

C: Velocity of flow in open channels

D: None of these

Question No 13: The length of hydraulic jump is roughly….

A: 2 to 3 times its height

B: 3 to 5 times its height

C: 5 to 7 times its height

D: None of these

Question No 14: Frictional loss of head includes the loss of energy due to….

A: Viscosity

B: Turbulence

C: Both (a) and (b)

D: None of these

1. E
2. A
3. A
4. C
5. D
6. C
7. C
8. D
9. D
10.  B
11.  B
12.  C
13.  C
14.  D