Q.1
A valve installed between the boiler and the feed pump is
  • Blow off cock
  • Feed check valve
  • Steam stop valve
  • None of these
Q.2
Which is not correct statement about effect of sulphur in fuel?
  • It has heating value
  • It helps in electrostatic precipitation of ash in flue gases
  • It leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
  • It erodes furnace walls
Q.3
The principal function of a stop valve is to
  • Control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
  • Empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
  • Put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
  • Increase the temperature of saturated steam without raising its pressure
Q.4
The best suited coal for chain or traveling grate stoker boiler is
  • Coking coal
  • Non-coking or free burning coal
  • Pulverized coal
  • High sulphur coal
Q.5
The action of steam in a steam turbine is
  • Static
  • Dynamic
  • Static and dynamic
  • Neither static nor dynamic
Q.6
Superheating of steam is done at
  • Constant volume
  • Constant temperature
  • Constant pressure
  • Constant entropy
Q.7
In turbines, the fluid undergoes a continuous steady flow process and the speed of flow is
  • Low
  • Very low
  • High
  • Very high
Q.8
Expanding steam to a very low pressure (high vacuum) in steam engines is
  • Desirable
  • Economical
  • Essential
  • Uneconomical
Q.9
The critical pressure ratio for initially superheated steam is __________ as compared to initially dry saturated steam.
  • More
  • Less
  • Same
  • None of these
Q.10
In a reaction turbine
  • The steam is allowed to expand in the nozzle, where it gives a high velocity before it enters the moving blades
  • The expansion of steam takes place partly in the fixed blades and partly in the moving blades
  • The steam is expanded from a high pressure to a condenser pressure in one or more nozzles
  • The pressure and temperature of steam remains constant
0 h : 0 m : 1 s