# Practice Test: Question Set - 33

**1. When the pressure intensity at a point is more than the local atmospheric pressure, then the difference of these two pressures is called**

- (A) Gauge
pressure

- (B) Absolute
pressure

- (C) Positive
gauge pressure

- (D) Vacuum
pressure

**2. If the coefficient of discharge is 0.6, then the discharge over a right angled notch is**

- (A) 0.417

*H*

^{5/2}

- (B) 1.417

*H*

^{5/2}

- (C) 4.171

*H*

^{5/2}

- (D) 7.141

*H*

^{5/2}

**3. The most efficient section of a channel is**

- (A) Triangular

- (B) Rectangular

- (C) Square

- (D) Trapezoidal

**4. A pipe of length more than double the diameter of orifice fitted externally or internally to the orifice is called a**

- (A) Notch

- (B) Weir

- (C) Mouthpiece

- (D) Nozzle

**5. An open tank containing liquid is moving with an acceleration on an inclined plane. The inclination of the free surface of the liquid will be __________ to the acceleration of the tank.**

- (A) Equal to

- (B) Directly
proportional

- (C) Inversely
proportional

- (D) None of
these

**6. The coefficient of discharge for an external mouthpiece is**

- (A) 0.375

- (B) 0.5

- (C) 0.707

- (D) 0.855

**7. The process of diffusion of one liquid into the other through a semi permeable membrane is called**

- (A) Viscosity

- (B) Osmosis

- (C) Surface tension

- (D) Cohesion

**8. One stoke is equal to**

- (A) 10

^{-2}m

^{2}/s

- (B) 10

^{-3}m

^{2}/s

- (C) 10

^{-4}m

^{2}/s

- (D) 10

^{-6}m

^{2}/s

**9. Falling drops of water become spheres due to the property of**

- (A) Surface
tension of water

- (B) Compressibility
of water

- (C) Capillarity
of water

- (D) Viscosity of
water

**10. The specific gravity of an oil whose specific weight is 7.85 kN/m**

^{3}, is- (A) 0.8

- (B) 1

- (C) 1.2

- (D) 1.6

**11. The length of the divergent cone in a Venturimeter is __________ that of the convergent cone.**

- (A) Equal to

- (B) Double

- (C) Three to
four times

- (D) Five to six
times

**12. 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**

- (A) Neutral
equilibrium

- (B) Stable
equilibrium

- (C) Unstable
equilibrium

- (D) None of
these

**13. The stress-strain relation of the Newtonian fluid is**

- (A) Linear

- (B) Parabolic

- (C) Hyperbolic

- (D) Inverse type

**14. The viscosity of a liquid __________ its rate of flow through a hole in a vessel.**

- (A) Effects

- (B) Does
not effect

- (C) Both A and B

- (D) None of
these

**15. The coefficient of discharge in case of internal mouthpiece is __________ that of external mouthpiece.**

- (A) Less than

- (B) More than

- (C) Equal to

- (D) None of
these

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