Hydraulic and Fluid Mechanics

151. General energy equation holds for

  1. Steady flow
  2. Turbulent flow
  3. Laminar flow
  4. Non-uniform flow

Correct answer: (D)
Non-uniform flow

152. Gradually varied flow is

  1. teady uniform
  2. on-steady non-uniform
  3. on-steady uniform
  4. teady non-uniform

Correct answer: (D)
teady non-uniform

153. Hot wire anemometer is used to measure

  1. Pressure in gases
  2. Liquid discharge
  3. Pressure in liquids
  4. Gas velocities

Correct answer: (D)
Gas velocities

154. Hydrometer is used to determine

  1. Specific gravity of liquids
  2. Specific gravity of solids
  3. Specific gravity of gases
  4. Relative humidity

Correct answer: (A)
Specific gravity of liquids

155. If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its

  1. Specific weight
  2. Specific mass
  3. Specific gravity
  4. Specific density

Correct answer: (C)
Specific gravity

156. If a body floating in a liquid occupies a new position and remains at rest in this new position, when given a small angular displacement, the body is said to be in

  1. Neutral
  2. Stable
  3. Unstable
  4. None of these

Correct answer: (A)
Neutral

157. If a body floating in a liquid returns back to its original position, when given a small angular displacement, the body is said to be in

  1. Neutral equilibrium
  2. Stable equilibrium
  3. Unstable equilibrium
  4. None of these

Correct answer: (B)
Stable equilibrium

158. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

  1. Higher than the surface of liquid
  2. The same as the surface of liquid
  3. Lower than the surface of liquid
  4. Unpredictable

Correct answer: (C)
Lower than the surface of liquid

159. If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water

  1. 51 cm
  2. 50 cm
  3. 52 cm
  4. 52.2 cm

Correct answer: (A)
51 cm

160. If no resistance is encountered by displacement, such a substance is known as

  1. Fluid
  2. Water
  3. Gas
  4. Ideal fluid

Correct answer: (D)
Ideal fluid

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