57.

58.

59.

60.

Group-I contains dimensionless parameters and Group-II contains areas of significance for
dynamic similarity :

Group —I Group — IT
(K) Froud’s Number (1) Flow over spillways
(1) Reynold’s Number (2) Flow around submerged bodies
04) Euler’s Number (8) Capillary movement of water through soils
(N) Weber Number (4) Discharge through sluices

Choose the correct matching out of the following combinations

Codes (K) ൨) ൨2 0०

(A) 1 2 8 4
(B) 1 2 4 3
© 2 1 38 4
0) 4 8 1 2

The weight density of honey is 12kN/m’ and its dynamic viscosity at 20°C is 0.50 kg/m.s
Neglecting the weight density of air, the velocity with which air bubble of 1.0mm diameter
will rise in honey at 20°C is:

(^) 1.33 m/s (B) 1.33 mm/s
(C) 0.70 mm/s (D) 0.70 m/s

Out of the following options given below, choose the wrong one with respect to the boundary
layer thickness :

(A) Increases in the direction of flow

(B) Decreases as approach velocity increases

(C) Increases as kinematic viscosity increases

(D) Not dependent upon the pressure gradient in the direction of flow

Water flows over an obstruction and then flows along a downstream channel as shown in
figure given below. The width of the flow is same on both sides of the obstruction. The depth
of flow at section 2-2 is 2m. Assuming that there is no energy loss between sections 1-1 and

2-2 and g=10m/s*, the velocity of flow at section 1-1 is :

6m Vy

ஓ

(A) «10 7/5 (B) 3V10m/s
)© V5m/s (D) 3V5m/s

11 085/2023
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