Lakshya Education MCQs

Question: Water gas is produced by
Options:
A.Carbonisation of coal
B.Passing steam over incandescent coke
C.Passing air and a large amount of steam over waste coal at about 65°C
D.Partial combustion of coal, eke, anthracite coal or charcoal in a mixed air steam blast
Answer: Option B

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More Questions on This Topic :

Question 1. Which of the following statement is wrong?
  1.    In a two stage reciprocating air compressor with complete intercooling, maximum work is saved
  2.    The minimum work required for a two stage reciprocating air compressor is double the work required for each stage
  3.    The ratio of the volume of free air delivery per stroke to the swept volume of the piston is called volumetric efficiency
  4.    None of the above
Answer: Option D
Question 2. Work ratio of a gas turbine may be improved by
  1.    Decreasing the compression work
  2.    Increasing the compression work
  3.    Increasing the turbine work
  4.    Both (A) and (C) above
Answer: Option D
Question 3. In a turbo jet engine, subsequent to heat addition to compressed air, to get the power output, the working substance is expanded in
  1.    Exit nozzle, which is a constant volume process
  2.    Exit nozzle, which is essentially an isentropic process
  3.    Turbine blades, which is a constant volume process
  4.    Turbine blades, which is essentially an isentropic process
Answer: Option D
Question 4. Producer gas is produced by
  1.    Carbonisation of coal
  2.    Passing steam over incandescent coke
  3.    Passing air and a large amount of steam over waste coal at about 65°C
  4.    Partial combustion of coal, coke, anthracite coal or charcoal in a mixed air steam blast
Answer: Option D
Question 5. The criterion of the thermodynamic efficiency for rotary compressor is
  1.    Isentropic compression
  2.    Isothermal compression
  3.    Polytropic compression
  4.    None of the above
Answer: Option A
Question 6. Gas turbines for power generation are normally used
  1.    To supply base load requirements
  2.    To supply peak load requirements
  3.    To enable start thermal power plant
  4.    In emergency
Answer: Option B

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