# Practice Test: Question Set - 34

**1. The unit of surface tension is**

- (A) N/m

- (B) N/m

^{2}

- (C) N/m

^{3}

- (D) N-m

**2. The units of dynamic or absolute viscosity are**

- (A) Metres² per sec

- (B) kg sec/meter

- (C) Newton-sec per meter

- (D) Newton-sec² per meter

**3. A notch is used to measure __________ of liquids.**

- (A) Pressure

- (B) Discharge

- (C) Velocity

- (D) Volume

**4. Euler's number is the ratio of __________ force to pressure force.**

- (A) Inertia

- (B) Gravity

- (C) Viscous

- (D) None of
these

**5. A flow in which the volume of a fluid and its density does not change during the flow is called _________ flow.**

- (A) Incompressible

- (B) Compressible

- (C) Viscous

- (D) None of
these

**6. The weight per unit volume of a liquid at a standard temperature and pressure is called**

- (A) Specific
weight

- (B) Mass density

- (C) Specific
gravity

- (D) None of
these

**7. The efficiency of power transmission through pipe is (where**

*H*= Total supply head, and*h*= Head lost due to friction in the pipe)_{f}- (A)

*(H - h*

_{f })/H- (B)

*H/(H - h*

_{f })- (C)

*(H + h*

_{f })/H- (D)

*H/(H + h*

_{f })**8. The error in discharge (**

*dQ*/*Q*) to the error in measurement of head (*dH*/*H*) over a rectangular notch is given by- (A)

*dQ/Q = (1/2)*

*× (dH/H)*

- (B)

*dQ/Q = (3/4)*

*× (dH/H)*

- (C)

*dQ/Q =*

*(dH/H)*

- (D)

*dQ/Q = (3/2)*

*× (dH/H)*

**9. The flow of water through the hole in the bottom of a wash basin is an example of**

- (A) Steady flow

- (B) Uniform flow

- (C) Free vortex

- (D) Forced
vortex

**10. A flow in which the viscosity of fluid is dominating over the inertia force is called**

- (A) Steady flow

- (B) Unsteady
flow

- (C) Laminar flow

- (D) Turbulent
flow

**11. The hydraulic mean depth or the hydraulic radius is the ratio of**

- (A) Area of flow
and wetted perimeter

- (B) Wetted
perimeter and diameter of pipe

- (C) Velocity
of flow and area of flow

- (D) None of
these

**12. A flow whose streamline is represented by a curve, is called**

- (A) One-dimensional
flow

- (B) Two-dimensional
flow

- (C) Three-dimensional
flow

- (D) Four-dimensional
flow

**13. The value of coefficient of discharge is __________ the value of coefficient of velocity.**

- (A) Less than

- (B) Same as

- (C) More than

- (D) None of
these

**14. The hydraulic mean depth for a circular pipe of diameter (**

*d*) is- (A)

*d*/6

- (B)

*d*/4

- (C)

*d*/2

- (D)

*d*

**15. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as**

- (A) Real fluid

- (B) Ideal fluid

- (C) Newtonian
fluid

- (D) Non-Newtonian
fluid

**View All Answers**

Blogger Comment

Facebook Comment