# Practice Test: Question Set - 29

**1. Manometer is used to measure**

- (A) Pressure in pipes,
channels etc.

- (B) Atmospheric pressure

- (C) Very low pressure

- (D) Difference of
pressure between two points

**2. The flow in which conditions do not change with time at any point, is known as**

- (A) One dimensional flow

- (B) Uniform flow

- (C) Steady flow

- (D) Turbulent flow

**3. A nozzle placed at the end of a water pipe line discharges water at a**

- (A) Low pressure

- (B) High
pressure

- (C) Low
velocity

- (D) High
velocity

**4. The pressure of fluid due to hammer blow is**

- (A) Directly
proportional to density of fluid

- (B) Inversely
proportional to density of fluid

- (C) Directly
proportional to (density)

^{1/2}of fluid

- (D) Inversely
proportional to (density)

^{1/2}of fluid

**5. In order to measure the flow with a Venturimeter, it is installed in**

- (A) Horizontal
line

- (B) Inclined
line with flow upwards

- (C) Inclined
line with flow downwards

- (D) Any
direction and in any location

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

- (A) 51 cm

- (B) 50 cm

- (C) 52 cm

- (D) 52.2 cm

**7. According to equation of continuity,**

- (A)

*w*

_{1}

*a*

_{1}=

*w*

_{2}

*a*

_{2}

- (B)

*w*

_{1}

*v*

_{1}=

*w*

_{2}

*v*

_{2}

- (C)

*a*

_{1}

*v*

_{1}=

*a*

_{2}

*v*

_{2}

- (D)

*a*

_{1}/

*v*

_{1}=

*a*

_{2}/

*v*

_{2}

**8. The discharge over a rectangular weir, considering the velocity of approach, is (where**

*H*_{1}=*H*+*H*= Total height of water above the weir,_{a}*H*= Height of water over the crest of the weir, and*H*= Height of water due to velocity of approach)_{a}- (A)

*(2/3) C*√

_{d}× L.*2g [H*

_{1}- H_{a}]- (B)

*(2/3) C*√

_{d}× L.*2g [H*

_{1}^{3/2}- H_{a}^{3/2}]- (C)

*(2/3) C*√

_{d}× L.*2g [H*

_{1}^{2}- H_{a}^{2}]- (D)

*(2/3) C*√

_{d}× L.*2g [H*

_{1}^{5/2}- H_{a}^{5/2}]**9. The Francis formula for the discharge over Cipoletti weir is**

- (A) 1.84

*LH*

^{1/2}

- (B) 1.84

*LH*

- (C) 1.84

*LH*

^{3/2}

- (D) 1.84

*LH*

^{5/2}

**10. One poise is equal to**

- (A) 0.1 N-s/m

^{2}

- (B) 1 N-s/m

^{2}

- (C) 10 N-s/m

^{2}

- (D) 100 N-s/m

^{2}

**11. When a vertical wall is subjected to pressures due to liquid on both sides, the resultant pressure is the __________ of the two pressures.**

- (A) Sum

- (B) Difference

- (C) Arithmetic
mean

- (D) Geometric
mean

**12. The mercury does not wet the glass. This is due to the property of the liquid known as**

- (A) Cohesion

- (B) Adhesion

- (C) Viscosity

- (D) Surface
tension

**13. A channel is said to be of most economical cross-section, if**

- (A) It gives
maximum discharge for a given cross-sectional area and bed slope

- (B) It has
minimum wetted perimeter

- (C) It
involves lesser excavation for the designed amount of discharge

- (D) All of the
above

**14. The maximum efficiency of transmission through a pipe is**

- (A) 50 %

- (B) 56.7 %

- (C) 66.67 %

- (D) 76.66 %

**15. Ratio of inertia force to elastic force is known as**

- (A) Mach number

- (B) Froude number

- (C) Reynolds number

- (D) Weber's number

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