Which of the following boilers is best suited to meet fluctuating demands___________________?

Related Mcqs:

1. In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine__________________?

   A. lancashire boiler
   B. locomotive boiler
   C. babcock and wilcox boiler
   D. cochran boiler
   E. benson boiler

2. Which of the following are used in diesel engines and oil fired boilers :

   A. Paraffin
   B. Gasoline
   C. Heavy fuel oils
   d) Patrol

   Submitted by: Faheem Zaman Dhaunroo

3. Duplex feed pumps are used in small steam boilers. These operate on the principle of_________________?

   A. centrifugal pump
   B. axial flow pump
   C. gear pump
   D. ejector pump
   E. reciprocating pump

4. The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is___________________?

   A. more
   B. less
   C. same
   D. could be more or less depending on other factors
   E. none of the above

5. Fire tube boilers are those in which__________________?

   A. flue gases pass through tubes and water around it
   B. water passes through the tubes and flue gases around it
   C. forced circulation takes place
   D. tubes are laid vertically
   E. none of the above

6. A fusible plug is fitted in small boilers in order to ___________________?

   A. avoid excessive build up of pressure
   B. avoid explosion
   C. extinguish fire if water level in the boiler falls below alarming limit
   D. control steam dome
   E. remove molten aslj

7. The economizer is used in boilers to _______________________?

   A. increase thermal efficiency of boiler
   B. economise on fuel
   C. extract heat from the exhaust flue gases
   D. increase flue gas temperature
   E. to heat feed water by bled steam

8. The basic job of feed water treatment in boilers is to overcome the problem of __________________?

   A. corrosion
   B. scale
   C. carryover
   D. embrittlement
   E. all of the above

9. 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

10. The function of injector used in small capacity boilers is to____________________?

    A. create vacuum
    B. inject chemical solution in feed pump
    C. pump water, similar to boiler feed pump
    D. add make up water in the system
    E. none of the above