**Q.1) Newton’s law of viscosity relates :**

A) Intensity of pressure and rate of angular deformation

B) Shear stress and rate of angular deformation

C) Shear stress, viscosity and temperature

D) Viscosity and rate of angular deformation

**Option (B)**

**Q.2) An ideal fluid is :**

A) One which obeys Newton’s law of viscosity

B) Frictionless and incompressible

C) Very viscous

D) Frictionless and compressible

**Option (B)**

**Q.3) If a vessel containing liquid moves downward with a constant acceleration equal to ‘g’ then –**

A) The pressure throughout the liquid mass is atmospheric

B) There will be vacuum in the liquid

C) The pressure in the liquid mass is greater than hydrostatic pressure

D) None of the above

**Option (A)**

**Q.4) The eddy viscosity for turbulent flow is –**

A) A function of temperature only

B) A physical property of the fluid

C) Dependent on the flow

D) Independent of the flow

**Option (C)**

**Q.5) The pitot tube is used to measure :**

A) Velocity at stagnation point

B) Stagnation pressure

C) Static pressure

D) Dynamic pressure

**Option (B)**

**Q.6) Size of Venturimeter is specified by :**

A) Pipe diameter

B) Throat diameter

C) Angle of diverging section

D) Both pipe diameter and throat diameter

**Option (D)**

**Q.7) The major loss of energy in long pipes is due to –**

A) Sudden enlargement

B) Sudden contraction

C) Gradual contraction or enlargement

D) Friction

**Option (D)**

**Q.8) With the same cross sectional area and immersed in the turbulent flow, the largest total drag will be on –**

A) A circular disc of plate held normal to flow

B) A sphere

C) A cylinder

D) A streamlined body

**Option (A)**

**Q.9) The velocity distribution for laminar flow through a circular tube :**

A) Is constant over the cross-section

B) Varies linearly from zero at walls to maximum at centre

C) Varies parabolically with maximum at the centre

D) None of the above

**Option (C)**

**Q.10) The maximum thickness of boundary layer in a pipe of radius ‘r’ is :**

A) 0

B) r/2

C) r

D) 2r

**Option (C)**

**Q.11) The best hydraulic channel cross-section is the one which has –**

A) Minimum roughness coefficient

B) Least cost

C) Maximum area for a given flow

D) Minimum wetted perimeter

**Option (D)**

**Option (D)**

**Q.13) For maximum discharge in a circular channel section, the ratio of the depth of flow to that of diameter of the channel is –**

A) 0.30

B) 0.50

C) 0.81

D) 0.95

**Option (D)**

**Q.14) For the same specific force, the two depths at which a given discharge can occur are called –**

A) Alternate depths

B) Normal depths

C) Critical depths

D) Conjugate depths

**Option (D)**

**Q.15) When the slope of bottom of a channel rises in the direction of flow, it is called –**

A) Critical slope

B) Mild slope

C) Steep slope

D) Adverse slope

**Option (D)**

**Q.16) The pressure coefficient is the ratio of pressure forces to :**

A) Gravity forces

B) Viscous forces

C) Inertial forces

D) None of the above

**Option (C)**

**Q.17) If the velocity distribution is rectangular, the kinetic energy correction factor is –**

A) Greater than zero but less than unity

B) Less than zero

C) Equal to zero

D) Equal to unity

**Option (D)**

**Q.18) Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is –**

A) Slightly less

B) Slightly more

C) Nearly half

D) Equal

**Option (A)**

**Q.19) Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by –**

A) 5%

B) 10%

C) 15%

D) 20%

**Option (B)**

**Q.20) Equation of continuity is based on the principle of conservation of –**

A) Mass

B) Energy

C) Momentum

D) None of the above

**Option (A)**