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)

Steam Boilers, Engines, Nozzles and Turbines
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)

Vb = 0.5 V cosα

Vb = 0.5 V² cosα

Vb = V cosα

Vb = V² cosα

Vb = 0.5 V cosα

Vb = 0.5 V² cosα

Vb = V cosα

Vb = V² cosα

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Steam Boilers, Engines, Nozzles and Turbines
The function of an eccentric rod is

To convert rotary motion of the crankshaft into to and fro motion of the valve rod

To convert reciprocating motion of the piston into rotary motion of the crank

To provide reciprocating motion to the slide valve

To provide simple harmonic motion to the D-slide valve

To convert rotary motion of the crankshaft into to and fro motion of the valve rod

To convert reciprocating motion of the piston into rotary motion of the crank

To provide reciprocating motion to the slide valve

To provide simple harmonic motion to the D-slide valve

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Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

421 kg.m

539 kg.m

102 kg.m

421 kg.m

539 kg.m

102 kg.m

421 kg.m

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Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal

All the fuel burns instantaneously producing high energy release

Fuel burns with less air

Explosion in furnace

Coal bursts into flame without any external ignition source but by itself due to gradual increase in temperature as a result of heat released by combination of oxygen with coal

All the fuel burns instantaneously producing high energy release

Fuel burns with less air

Explosion in furnace

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Steam Boilers, Engines, Nozzles and Turbines
The density of supersaturated steam is about __________ that of the ordinary saturated vapor at the corresponding pressure.

2 times

4 times

8 times

Same as

2 times

4 times

8 times

Same as

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Steam Boilers, Engines, Nozzles and Turbines
The ratio of the actual vacuum to the ideal vacuum in a condenser is called

Boiler efficiency

Nozzle efficiency

Condenser efficiency

Vacuum efficiency

Boiler efficiency

Nozzle efficiency

Condenser efficiency

Vacuum efficiency

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Steam Boilers, Engines, Nozzles and Turbines

Steam Boilers, Engines, Nozzles and Turbines 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)

Steam Boilers, Engines, Nozzles and Turbines The function of an eccentric rod is

Steam Boilers, Engines, Nozzles and Turbines Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

Steam Boilers, Engines, Nozzles and Turbines Spontaneous combustion is a phenomenon in which

Steam Boilers, Engines, Nozzles and Turbines The density of supersaturated steam is about __________ that of the ordinary saturated vapor at the corresponding pressure.

Steam Boilers, Engines, Nozzles and Turbines The ratio of the actual vacuum to the ideal vacuum in a condenser is called

Steam Boilers, Engines, Nozzles and Turbines
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)

Steam Boilers, Engines, Nozzles and Turbines
The function of an eccentric rod is

Steam Boilers, Engines, Nozzles and Turbines
Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

Steam Boilers, Engines, Nozzles and Turbines
Spontaneous combustion is a phenomenon in which

Steam Boilers, Engines, Nozzles and Turbines
The density of supersaturated steam is about __________ that of the ordinary saturated vapor at the corresponding pressure.

Steam Boilers, Engines, Nozzles and Turbines
The ratio of the actual vacuum to the ideal vacuum in a condenser is called