Pressure drop due to pipe fittings can be estimated by the equation, ΔP/ρ = 4f, (Le/D) (V2/2gc) where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of (Le/D) (dimensionless) for 45° elbow and 180° close return bends would be respectively around______________________?

Related Mcqs:

Pick out the wrong statement ?

A. Lug supports are less expensive than other type of supports B. A pipe is differentiated from a tube by the fact that a pipe has a greater wall thickness compared to the tube C. A reducer is used to change the direction of a pipe in a straight run D. The method of fixing … Pick out the wrong statement ?Read More...

Normally, the length to diameter ratio of rotary dryers varies from 4 to 10 and for its economic operation; the number of transfer units (NTU) for such dryers varies from ?

A. 1.5-2.5 B. 3.5-5.5 C. 7.5-10.0 D. 10-15...

Height equivalent to a theoretical plate (HETP) is the height of packing that will give the same separation as one theoretical plate in gas-liquid mass transfer operations like distillation, absorption/stripping and humidification/dehumidification. HETP which is experimentally determined, depends upon the_______________?

A. Flow rates of each fluid B. Type and size of packing C. Concentration of each fluid D. All A, B. & C....

The diameter of a propeller agitator used in agitation tank ranges from ____________ percent of the tank diameter and its peripheral speed is normally 300 to 500 metres/minute ?

A. 5 to 10 B. 15 to 30 C. 40 to 50 D. 55 to 75...

Pick out the wrong statement about distillation operation__________________?

A. Distillation under vacuum is a substitute for steam distillation B. In differential (simple) distillation, the vapour is removed as soon as it is formed without appreciable condensation C. In flash (equilibrium) distillation, a definite fraction of liquid is vaporised in such a way that the evolved vapour & residual liquids are in equilibrium with … Pick out the wrong statement about distillation operation__________________?Read More...