Q.1
If Carnot cycle has maximum possible thermal efficiency, then why don’t the steam turbine power plants run on Carnot cycle?
  • a) Because boiler can’t be maintained at constant pressure in Carnot cycle
  • b) Since work consumed by compressor is approximately equal to work produced by turbine
  • c) As mean temperature of heat addition is quite low in case of Carnot cycle
  • d) Because the process of heat addition is at constant temperature
Q.2
Gas turbines work on which of the following cycle?
  • a) Diesel cycle
  • b) Brayton cycle
  • c) Rankine cycle
  • d) None of the mentioned
Q.3
What does aerodynamic efficiency mean?
  • a) Amount of energy contained in steam
  • b) Energy that can be extracted from a given volume of steam at given temperature and pressure
  • c) Amount of steam turbine blade can allow to flow inside
  • d) None of the mentioned
Q.4
Steam turbine governing can be defined as __________
  • a) controlling the flow rate of steam
  • b) increasing the steam speed
  • c) adjusting the governors for particular speeds
  • d) none of the mentioned
Q.5
In steam turbines carry over losses are due to _____________
  • a) increase in temperature
  • b) formation of eddies in annular spaces
  • c) decrease in pressure
  • d) none of the mentioned
Q.6
Pressure ratios beloware used in _____________ engines.
  • a) aero derivative engines
  • b) heavy frame engines
  • c) steam turbine
  • d) none of the mentioned
Q.7
Why Hydrogen rings are used in gas turbine?
  • a) to control Oxygen consumption
  • b) to control Hydrogen consumption
  • c) to control Fuel consumption
  • d) None of the mentioned
Q.8
Which of the following can be used as fuels in gas turbines?
  • a) petroleum
  • b) Diesel
  • c) Natural gases
  • d) All of the mentioned
Q.9
Why is steam turbine governing used?
  • a) To increase the steam speed
  • b) To decrease the steam speed
  • c) To maintain steam speed constant
  • d) None of the mentioned
Q.10
In a steam turbine a set of ________ blades are connected to casing.
  • a) stationary & rotating
  • b) stationary
  • c) rotating
  • d) none of the mentioned
Q.11
Passages in steam turbines are _______
  • a) convergent & divergent
  • b) convergent
  • c) divergent
  • d) none of the mentioned
Q.12
Steam turbine performance is expressed in _______
  • a) heat & steam rate
  • b) heat rate
  • c) steam rate
  • d) none of the mentioned
Q.13
When initial pressure of the steam turbine is not upto the designed pressure then power produced will _________
  • a) Remains constant
  • b) Increase
  • c) Decrease
  • d) None of the mentioned
Q.14
Steam turbines used in nuclear reactors use __________
  • a) Specific heat
  • b) Superficial fluids
  • c) High pressure steam
  • d) None of the mentioned
Q.15
Superficial steam turbines can be operated at ________
  • a) low speeds
  • b) high speeds
  • c) medium speeds
  • d) none of the mentioned
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