Question 71 : In a reaction turbine when the degree of reaction is zero, then there is
1. maximum heat drop in fixed blades
2. no heat drop in moving blades
3. no heat drop in fixed blades
4. maximum heat drop in moving blades
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Question 72 : A steam nozzle converts
1. heat energy of steam into potential energy
2. potential energy into heat energy of steam
3. heat energy of steam into kinetic energy
4. kinetic energy into heat energy of steam
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Question 73 : The process of draining steam from the turbine, at certain points during its expansion and using this steam for heating the feed water in feed water heaters and then supplying it to the boiler is known as
1. reheating of steam
2. regenerative heating
3. none of these
4. bleeding
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Question 74 : In a 50% reaction turbine stage, tangential component of absolute velocity at rotor inlet is 537 m/s and the blade velocity is 454 m/s. The power output in kW of steam will be
1. 296 kW
2. 282 kW
3. 302 kW
4. 260 kW
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Question 75 : When the nozzle operates with the maximum mass flow, the nozzle is said to be
1. underdamping
2. overdamping
3. choked
4. none of these
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Question 76 : In a reaction turbine
1. the steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades
2. the expansion of steam takes place partly in the fixed blades and partly in the moving blades
3. the pressure and temperature of steam remains constant
4. the steam is expanded from a high pressure to a condenser pressure in one or more nozzles
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Question 77 : In a velocity compounded impulse turbine, when steam flows through the second row of moving blades,
1. velocity increases
2. velocity decreases
3. velocity remains constant
4. pressure remains constant
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Question 78 : A stage, in reaction turbine, is represented by
1. number of entries of steam
2. number of casing
3. number of exits of steam
4. each row of blades
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