1. Uniform flow occurs when ?

at every point the velocity vector is identical, in magnitude and direction, for any given instant

the flow is steady

discharge through a pipe is constant

conditions do not change with time at any point

Answer: at every point the velocity vector is identical, in magnitude and direction, for any given instant

Explanation:


2. Fire hose nozzle is generally made of ?

divergent shape

convergent shape

convergent-divergent shape

cylindrical shape

Answer: convergent shape

Explanation:


3. Profile drag is equal to ?

friction drag – pressure drag

pressure drag – friction drag

pressure drag + friction drag

pressure drag x friction drag

Answer: pressure drag + friction drag

Explanation:


4. Highest efficiency is obtained with following channel section ?

circular

triangular

rectangular

trapezoidal

Answer: trapezoidal

Explanation:


5. Gate is an opening ?

with closed perimeter and of regular form through which water flows

with prolonged sides having length of 2 – 3 diameters of opening in thick wall

with partially full flow

in hydraulic structure with regulation provision

Answer: in hydraulic structure with regulation provision

Explanation:


6. The vertical component of pressure force on a submerged curved surface is equal to ?

weight of liquid vertically above the curved surface and extending upon the free surface

the force on a vertical projection of the curved surface

the product of pressure at centroid and surface area

horizontal component

Answer: weight of liquid vertically above the curved surface and extending upon the free surface

Explanation:


7. The rise of liquid along the walls of a revolving cylinder above the initial level ?

is greater than the depression of the liquid at the axis of rotation

is lesser than the depression of the liquid at the axis of rotation

is the same as the depression of the liquid at the axis of rotation

it depends upon the magnitude of speed

Answer: is the same as the depression of the liquid at the axis of rotation

Explanation:


8. The component of the force of the fluid on the body (which is generally inclined to the direction of motion of the body) parallel to the direction of motion is called ?

drag

lift

wake

propelling force

Answer: drag

Explanation:


9. The latent heat of steam at pressures greater than atmospheric in comparison to latent heat at atmospheric pressure is ?

less

more

equal

may be less or more depending on temperature

Answer: less

Explanation:


10. Sublimation region is the region where ?

solid and vapour phases are in equilibrium

solid and liquid phases are in equilibrium

liquid and vapour phases are in equilibrium

solid, liquid and vapour phases are in equilibrium

Answer: solid and vapour phases are in equilibrium

Explanation: