An economiser in a boiler______________________?

Related Mcqs:

1. 1 kg.m is equal to_________________?

   A. 9.81 Joules
   B. All Joules
   C. 427 Joules
   D. 102 Joules
   E. 539 Joules

2. In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?

   A. 40%
   B. 25%
   C. 50%
   D. 80%
   E. 90%

3. The diameter of cylindrical shell of the Lancashire boiler is of the order of__________________?

   A. 1 tp 1.25m
   B. 1 to 1.75 m
   C. 2 to 4 m
   D. 1.75 to 2.75 m
   E. 2.25 to 4.5 m

4. Hard coke is used in________________?

   A. cement industry
   B. thermal power plant
   C. blast furnace
   D. domestic use
   E. locomotives

5. One kilowatt-hour energy is equivalent to ________________?

   A. 1000 J
   B. 360 kJ
   C. 3600 kJ
   D. 3600 kW/sec
   E. 1000 kJ

6. The pressure at which latent heat of vaporisation of water is zero, is_________________?

   A. below atmospheric pressure
   B. 1 kg/cm2
   C. 100 kg/cm2
   D. 170 kg/cm2
   E. 225.6 kg/cm2

7. The pressure of reheat steam after passing through reheater compared to inlet condition is _________________?

   A. more
   B. less
   C. equal
   D. may be more or less depending on capacity of reheater
   E. none of the above

8. Which is not correct statement about the function of furnace____________________?

   A. to provide proper conditions for con-tinuous complete combustion
   B. mix fuel with air and ignite
   C. separate ash from coal
   D. maintain heat supply to prepare and ignite the incoming fuel
   E. to minimise radiation losses

9. The feed check valve is used in order to ______________________?

   A. regulate flow of boiler water
   B. check level of water in boiler drum
   C. recirculate unwanted feed water
   D. allow high pressure feed water to flow to drum and not allow reverse flow to take place
   E. none of the above

10. The proximate analysis of fuel lists__________________?

    A. various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume
    B. various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight
    C. fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash
    D. fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash
    E. moisture and ash free heating value