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Mechanical Engineering Mcqs

The balanced draft furnace is one using _________________________?

  • (A)  induced draft fan and chimney
  • (B)  induced draft fan and forced draft fan
  • (C)  forced draft fan and chimney
  • (D)  any one of the above
  • (E)  none of the above
Submitted By :Ali Uppal

Evaporative capacity of boiler is expressed as____________________?

  • (A)  kg of steam produced
  • (B)  steam pressure produced
  • (C)  kg of fuel fired
  • (D)  kg of steam produced per kg of fuel fifed
  • (E)  kg of water evaporated
Submitted By :Ali Uppal

Pulverized fuel is used for___________________?

  • (A)  better burning
  • (B)  more calorific value
  • (C)  less radiation loss
  • (D)  medium sized units
  • (E)  stoker fired boilers
Submitted By :Ali Uppal

Incomplete combustion can be best judged by__________________?

  • (A)  smoky chimney exit
  • (B)  excess air in flue gases
  • (C)  measuring carbon mono-oxide in flue gases
  • (D)  measuring temperature of flue gases at exit of furnace
  • (E)  measuring oxygen in flue gases
Submitted By :Ali Uppal

Submitted By :Ali Uppal

Overfire burning is the phenomenon of _____________________?

  • (A)  supply of excess, air
  • (B)  supply of excess coal
  • (C)  burning CO and unburnts in upper zone of furnace by supplying more air
  • (D)  fuel bed firing
  • (E)  none of the above
Submitted By :Ali Uppal

Deaeration of feed water is carried out because it reduces ____________________?

  • (A)  cavitation of .boiler feed pumps
  • (B)  corrosion caused by oxygen
  • (C)  heat transfer coefficient
  • (D)  pH value of water
  • (E)  weight of water to be handled
Submitted By :Ali Uppal

Natural water circulation, by convection in water tube boilers, with increase in pressure of boiler _________________?

  • (A)  increases
  • (B)  decreases
  • (C)  remains unaffected
  • (D)  first increases and then decreases
  • (E)  first decreases and then increases
Submitted By :Ali Uppal

During storage, the heating value of coal __________________?

  • (A)  increases
  • (B)  decreases
  • (C)  remains constant
  • (D)  may increase or decrease depending upon the method of storage
  • (E)  none of the above
Submitted By :Ali Uppal

Film boling occurs at _______________________?

  • (A)  very low pressure
  • (B)  atmospheric pressures
  • (C)  medium pressures
  • (D)  very high pressures
  • (E)  none of the above
Submitted By :Ali Uppal

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