Part A (20 x 2 = 40)

- What is Newton's law of viscosity?
- State the similarity laws
- What is potential flow?
- State the type of fluid in the following cases:

(a) Rubber latex

(b) Bentonite clay - Define equivalent diameter of pipe
- Distinguish between form drag and skin drag
- Define Mach number
- What is the relation between maximum velocity and average velocity in laminar flow and turbulent flow
- Draw velocity profile for laminar flow in a circular pipe
- Compare and contrast venturi meter and orifice meter
- What is the principle of working of pitot tube?
- Give examples of area and head flow meters
- Define porosity and minimum fluidization velocity
- Draw the drag curves for regular solids
- State Ergun's equation and its application
- Define boundary layer
- What is meant by NPSH?
- Compare centrifugal pump with reciprocating pump
- List the various losses occurring in centrifugal pump
- Write the filed of application of various flow meters
- In a chemical reactor of 10 m tall, the density of fluid mixture varies with the distance 'y' in meters from the top of the reactor as
- The performance of an oil rig consuming a discharge Q of oil depends on the internal diameter d of the rig, the rotational speed N of the shaft, the mass density r, the dynamic viscosity m, the surface tension s and the specific weight w of the oil. Show by dimensional analysis
- State and prove the Bernoulli's theorem for incompressible fluid and indicate the corrections necessary for its application
- Water at 60
^{o}C is pumped from a reservoir to the top of a mountain through a 15 cm pipe at a velocity of 3.5 m/s. The pipe discharges into the atmosphere at a level of 1000 m above the level in the reservoir. The pipe itself is 1500 m long. If the overall efficiency of the pump is 65%, calculate the power requirement. - An orifice meter having an inside diameter of 2.5 cm is located in a 8 cm pipe. Water is flowing through the line and the mercury manometer measures the differential pressure over the instrument. The leads are filled with water. When the manometer reading is 35 cm, what is the flow rate of water per minute?
- (a) Explain the working of a rotameter with a neat sketch. (6)
- Derive Ergun's equation and state its usefulness.
- What is continuous fluidization? Explain how and where it is applied? Briefly state the design steps for a system using continuous fluidization.
- (a) Discuss the factors to be considered for selecting a pump for an operation. (5)
- Write short notes on:

(a) Compressors and blowers

(b) Fans

(c) Diaphragm pumps

Part B (5 x 12 = 60)

r = 1000[ 1 + y/50 + (y/100)^{2}]

Assuming the mixture to be effectively stationary, determine the pressure difference between the top and bottom of the reactor.

Or

Or

Or

(b) Explain the method of functioning of a magnetic flow meter. (6)

Or

(b) With a neat sketch explain the working of a centrifugal pump. (7)

Or