The efficiency of an impulse turbine is maximum when (where Vb = Blade – McqOptions

MCQOPTIONS

1.	The efficiency of an impulse turbine is maximum when (where Vb = Blade speed, V = Absolute velocity of steam entering the blade, and α = Nozzle angle)
A.	b = 0.5 V cosα
B.	b = V cosα
C.	b = 0.5 V² cosα
D.	b = V² cosα
Answer» B. b = V cosα

Discussion

No Comment Found

Related MCQs

A _________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
Gradually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of
The mechanical draught _________ with the amount of smoke.
Proximate analysis of fuel is determination of percentage of
Ultimate analysis of fuel is determination of percentage of
The blade friction in the impulse turbine reduces the velocity of steam by __________ while it passes over the blades.
The temperature of flue gases at air heater outlet should be
A compound steam engine in which piston rods of high pressure and low pressure cylinders ' are attached to two different cranks set at 180° to each other, is called
A compound steam engine in which piston rods of high pressure and low pressure cylinders are attached to two different cranks set at 90° to each other, is called
Expanding steam to a very low pressure (high vacuum) in steam engines is