1. Pressure of a fluid is measured by a

- barometer
- manometer
- lactometer
- thermometer
- submerged height

2. The liquid used in manometers should have

- low density
- high density
- low surface tension
- high surface tension

3. Manometers are used to measure

- pressure in water channels, pipes, etc.
- difference in pressure at two points
- atmospheric pressure
- very low pressure

4. Micro-manometer is used to

- determine low pressure difference
- determine higher pressure difference
- pressure measurement for gases only
- measure pressure in congested areas

5. The difference in pressure head, measured a mercury water differential manometer for 20 cm difference of mercury will be

- 2.52 m
- 2.72 m
- 0.2 m
- 2.0 m

6. Mercury is generally used in manometers for measuring

- low pressure accurately
- large pressure only
- all pressures except the small ones
- very low pressure

7. The reading on a differential manometer containing mercury (specific gravity= 13.6) is 25 cm. If mercury is replaced with water, the reading on differential manometer would be

- 3.15 m
- 3.4 m
- 34 m
- 31.5 cm

8. A differential manometer is used to measure

- pressure in Venturimeter
- difference of pressure between two points in a pipe
- atmospheric pressure
- pressure in pipes

9. Multi U-tube manometers with different fluids are used to measure

- very low pressure
- low pressure
- medium pressure
- high pressure

10. If a mercury-oil differential manometer shows a 20 cm difference of mercury level, the difference in the pressure head is (consider the specific gravity of oil = 0.8)

- 2.0 m of oil
- 2.5 m of oil
- 3.2 m of oil
- 4.2 m of oil

11. Air flows through a duct, and the Pitot-static tube measuring the velocity is attached to a differential manometer containing water. If the deflection of the manometer is 100mm, assuming the density 0f air is constant and equals to 1.22 kg/m^{3}, and that the coefficient of the tube is 0.98. The air velocity will be

- 4.07 m/s
- 0.393 m/s
- 39.3 m/s
- 3.93 m/s

12. The reading of differential manometer of a venturimeter, placed at 45° to the horizontal is 11 cm. If the venturimeter is turned to horizontal position, the manometer reading will be

- 0
- 11 cm
- $\frac{1}{\sqrt{2}}$cm
- $11\sqrt{2}$cm

13. A horizontal pipe line conveys a constant rate of flow which is measured by venturimeter installed on it. When the pipe is inclined upwards in the direction of flow, the reading of level difference on a differential U-tube manometer

- will increase
- will remain same
- will decrease
- may fluctuate with time

14. A pipe contains an oil of specific gravity 0.9, A differential manometer connected at the two points A and B shows a difference in mercury levels as 15 cm. The difference of pressure at the two points A and B will be (Note: consider the density of mercury as 1360 kg/m^{3})

- 15981 N/m
^{2} - 18688 N/m
^{2} - 6528 N/m
^{2} - 288 N/m
^{2}