hydraulics

Question 1

The thickness of a sharp crested weir is kept less than

Answer 1

one-half of the height of water on the sill

Question 2

The side slope of Cipolletti weir is generally kept

Answer 2

1 to 4

Question 3

time period of floating object

Answer 3

Time period = 2π (K^2/GM. g)^0.5

Where, K = Radius of gyration.

GM = Metacentric height.

T = 2π (4^2/0.725x9.81) = 3π answer.

Question 4

The only arch dam in India is

Answer 4

The only arch dam in India is the Idukki Dam in Kerala.

Question 5

Highest Dam in India

Answer 5

Tehri dam : h=260m l=575m.
Bhakhra nangal : h=226m l=520m.
Sardar sarovar : h=163m l=1210m.
Hirakund : h=60.9m l=25.8 km.

Question 6

longest dam in india

Answer 6

Hirakund : h=60.9m l=25.8 km.

Question 7

To avoid the force of surface tension in an inclined manometer, the minimum angle of inclination is

Answer 7

4%

Question 8

Euler’s Equation is based on some assumptions:

Answer 8

Euler’s Equation is based on some assumptions:

1. Non-viscous flow.
2. In-compressible and homogeneous flow.
3. Steady flow.
4. Continuous flow.
5. Uniform velocity of the flow.

Question 9

Discharge through Cipolletti weir :

Answer 9

Discharge through Cipolletti weir

Q= 1.84LH^(3/2).

Question 10

in order to avoid capillary correction, the minimum diameter of a manometer used for measuring pressure, should be

Answer 10

6 mm

Question 11

In a centrifugual pump casing, the flow of water leaving the impeller, is

Answer 11

Flow inside the impeller of a centrifugal pump is forced vortex flow but the flow of water leaving the impeller is free vortex flow.

Question 12

In a short cylindercial external mouthpiece, the venacontracta occurs at a distance from the outlet of orifice equal to

Answer 12

one-fourth the diameter of the orifice

Question 13

An orifice is called a large orifice if water head, is

Answer 13

five times the diameter of the orifice.

Question 14

The gases are considered incompressible if Match number is

Answer 14

M < 0.3 are said to be incompressible.

Question 15

A load w is rolled a distance d across the deck of a ship of weight W, due to which the ship heels through θ°. The metacentric height of the ship, is

Answer 15

GM = w.d / (W .tanθ)

Question 16

he discharg formula Q = Cd (2gH)^0.5 x A is used for rectangular large and small

Answer 16

for small orifice
Q = Cd (2gH)^0.5 x A

for large orifice
Q = (2/3)*Cd (2gH)^0.5 x A

Question 17

width of broad crested weir

Answer 17

L > H/2

Question 18

Cd value for all types of mouthpiece

Answer 18

For External mouthpiece Cd = 0.855.
For internal mouthpiece (Running free) = 0.5.
For internal mouthpiece ( Running Full) = 0.707.
For convergent-divergent mouthpiece = 1.

Question 19

In order to avoid tendency of separation at throat in a venturimeter, the ratio of the diameter at throat to the diameter of pipe should be

Answer 19

1/3 to 1/2

Question 20

An orifice is said to be large, if

Answer 20

the available head of liquid is less than 5 times the height of orifice