Question: In a forced vortex motion, the velocity of flow is________________?

• 1. directly proportional to its radial distance from axis of rotation
• 2. inversely proportional to its radial distance from the axis of rotation
• 3. inversely proportional to the square of its radial distance from the axis of rotation
• 4. directly proportional to the square of its radial distance from the axis of rotation

Question: Which of the following velocity potentials satisfies continuity equation ?

• 1. x2y
• 2. x2-y2
• 3. cosx
• 4. x2 + y2

Question: If velocity is zero over l/3rd of a cross-section and is uniform over remaining 2/3rd of the cross-section, then the correction factor for kinetic energy is__________________?

• 1. 4/3
• 2. 3/2
• 3. 9/4
• 4. 27/8

Question: When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________________?

• 1. 0
• 2. 1
• 3. 4/3
• 4. 2

Question: Select the incorrect statement?

• 1. The pressure intensity at vena contracta is atmospheric
• 2. Contraction is least at vena contracta
• 3. Stream lines are parallel throughout the jet at vena contracta
• 4. Coefficient of contraction is always less than one

Question: Which of the following is an incorrect statement ?

• 1. Coefficient of contraction of a venturimeter is unity
• 2. Flow nozzle is cheaper than venturimeter but has higher energy loss
• 3. Discharge is independent of orientation of venturimeter whether it is horizontal, vertical or inclined
• 4. None of the above statement is correct.

Question: A right circular cylinder open at the top is filled with liquid and rotated about its vertical axis at such a speed that half the liquid spills out, then the pressure intensity at the center of bottom is___________________?

• 1. zero
• 2. one-fourth its value when cylinder was full
• 3. one-half its value when cylinder was full
• 4. cannot be predicted from the given data

Question: When a liquid rotates at a constant angular velocity about a vertical axis as a rigid body, the pressure intensity varies________________?

• 1. linearly with radial distance
• 2. as the square of the radial distance
• 3. inversely as the square of the radial distance
• 4. inversely as the radial distance

Question: The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as__________________?

• 1. center of gravity
• 2. center of buoyancy
• 3. center of pressure
• 4. metacentre

Question: If the weight of a body immersed in a fluid exceeds the buoyant force, then the body will________________?

• 1. rise until its weight equals the buoyant force
• 2. tend to move downward and it may finally sink
• 3. float
• 4. none of the above