# Practice Test: Question Set - 02

**1. A fluid which obeys the Newton's law of viscosity is termed as**

- (A) Real fluid

- (B) Ideal fluid

- (C) Newtonian
fluid

- (D) Non-Newtonian
fluid

**2. In order that flow takes place between two points in a pipeline, the differential pressure between these points must be more than**

- (A) Frictional force

- (B) Viscosity

- (C) Surface friction

- (D) All of the above

**3. The error in discharge (**

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

*dQ*

*/Q =*3/2

*×*

*(dH/H)*

- (B)

*dQ*

*/Q =*2 ×

*(dH/H)*

- (C)

*dQ*

*/Q =*5/2

*×*

*(dH/H)*

- (D)

*dQ*

*/Q =*3

*×*

*(dH/H)*

**4. For similarity, in addition to models being geometrically similar to prototype, the following in both cases should also be equal**

- (A) Ratio of inertial
force to force due to viscosity

- (B) Ratio of inertial
force to force due to gravitation

- (C) Ratio of inertial
force to force due to surface tension

- (D) All the four ratios of inertial force to
force due to viscosity, gravitation, surface tension, and elasticity

**5. The value of coefficient of velocity for a sharp edged orifice __________ with the head of water.**

- (A) Decreases

- (B) Increases

- (C) Remain same

- (D) None of
these

**6. 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**

- (A) Higher than the surface of liquid

- (B) The same as the surface of liquid

- (C) Lower than the surface of liquid

- (D) Unpredictable

**7. The ratio of the inertia force to the __________ is called Euler's number.**

- (A) Pressure
force

- (B) Elastic
force

- (C) Surface
tension force

- (D) Viscous
force

**8. A one dimensional flow is one which**

- (A) Is uniform flow

- (B) Is steady uniform
flow

- (C) Takes place in
straight lines

- (D) Involves zero transverse component of flow

**9. According to Manning's formula, the discharge through an open channel is (where**

*M*= Manning's constant)- (A)

*A*×

*M*×

*m*

^{1/2}×

*i*

^{2/3}

- (B)

*A*×

*M*×

*m*

^{2/3}×

*i*

^{1/2}

- (C)

*A*

*×*

^{1/2}*M*

^{2/3}×

*m*×

*i*

- (D)

*A*

*×*

^{2/3}*M*

*×*

^{1/3}*m*×

*i*

**10. Dimensions of surface tension are**

- (A) ML°T⁻²

- (B) ML°T

- (C) ML r²

- (D) ML²T²

**11. An opening in the side of a tank or vessel such that the liquid surface with the tank is below the top edge of the opening, is called**

- (A) Weir

- (B) Notch

- (C) Orifice

- (D) None
of these

**12. The property of fluid by virtue of which it offers resistance to shear is called**

- (A) Surface tension

- (B) Adhesion

- (C) Adhesion

- (D) Viscosity

**13. Coefficient of velocity is defined as the ratio of**

- (A) Actual
velocity of jet at vena contracta to the theoretical velocity

- (B) Area
of jet at vena contracta to the area of orifice

- (C) Actual
discharge through an orifice to the theoretical discharge

- (D) None
of the above

**14. A liquid compressed in cylinder has a volume of 0.04 m**

^{3}at 50 kg/cm² and a volume of 0.039 m^{3}at 150 kg/cm². The bulk modulus of elasticity of liquid is- (A) 400 kg/cm²

- (B) 4000 kg/cm²

- (C) 40 × 10⁵ kg/cm²

- (D) 40 × 10⁶ kg/cm²

**15. The mass of 2.5 m**

^{3}of a certain liquid is 2 tonnes. Its mass density is- (A) 200 kg/m

^{3}

- (B) 400 kg/m

^{3}

- (C) 600 kg/m

^{3}

- (D) 800 kg/m

^{3}

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