# Hydraulics and Fluid Mechanics

• ## In a two dimensional incompressible steady flow around an airfoil, the stream lines are 2 cm apart at a great distance from the airfoil, where the velocity is 30 m/sec. The velocity near the airfoil, where the stream lines are 1.5 cm apart, is_____.

• A. 22.5 m/sec.
• B. 33 m/sec.
• C. 40 m/sec.
• D. 90 m/sec.
Explanation:

No answer description available for this question.

• ## A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?

• A. 4 minutes
• B. 4 x (225)3/2 minutes
• C. 4 (225)1/3 minutes
• D. 4 x (225)1/2 minutes
Explanation:

No answer description available for this question.

• ## A fluid of kinematic viscosity 0.4 cm²/sec flows through a 8 cm diameter pipe. The maximum velocity for laminar flow will be

• A. less than 1 m/sec
• B. 1 m/sec
• C. 1.5 m/sec
• D. 2 m/sec
Explanation:

No answer description available for this question.

• ## According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to_____.

• A. the weight of the body
• B. more than the weight of the body
• C. less than the weight of the body
• D. weight of the fluid displaced by the body
Explanation:

No answer description available for this question.

• ## Coefficient of velocity of venturimeter _____.

• A. is independent of Reynolds number
• B. decreases with higher Reynolds number
• C. is equal to the coefficient of discharge of venturimeter
• D. none of the above
Explanation:

No answer description available for this question.

• ## Stream lines and path lines always coincide in case of_____.

• B. laminar flow
• C. uniform flow
• D. turbulent flow
Explanation:

No answer description available for this question.

• ## The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to_____.

• A. 0.1
• B. 0.01
• C. 0.001
• D. 0.0001
Explanation:

No answer description available for this question.

• ## The difference of pressure between the inside and outside of a liquid drop is_____.

• A. (a)p = Txr
• B. (b)p = T/r
• C. p = T/2r
• D. (d)p = 2T/r
Explanation:

No answer description available for this question.

• ## Center of pressure on an inclined plane is_____.

• A. at the centroid
• B. above the centroid
• C. below the centroid
• D. at metacentre
Explanation:

No answer description available for this question.

• ## When an ideal fluid flows past a sphere_____.

• A. highest intensity of pressure occurs around the circumference at right angles to flow
• B. lowest pressure intensity occurs at front stagnation point
• C. lowest pressure intensity occurs at rear stagnation point
• D. total drag is zero