Which type of boiler can meet rapid changes of load____________________?

Related Mcqs:

1. Pick up the correct statement as regards Cornish boiler and Lancashire boiler _______________?

   A. cornish is fire tube and lancashire is water tube
   B. cornish is water tube and lancashire is fire tube
   C. cornish has two fire tubes and lancashire has one
   D. lancashire has two fire tubes and cornish has one
   E. both have two fire tubes

2. The difference between cornish boiler and lancashire boiler is that_________________?

   A. former is fire tube type and latter is water tube type boiler
   B. former is water tube type and latter is fire tube type
   C. former contains one fire tube and latter contains two fire tubes
   E. none/of the above

3. The size of a boiler drum in pulverised fuel fired boiler,as its size and capacity, (steam pressure and flow ratings) increase __________________?

   A. increases
   B. decreases
   C. remains unchanged
   D. increases/decreases depending on steam temperature requirements
   E. unpredictable

4. For the same diameter and thickness of tube, a water tube boiler compared to a fire tube boiler has ____________________?

   A. more heating surface
   B. less heating surface
   C. equal heating surface
   D. heating surface depends on other parameters
   E. none of the above

5. In natural circulation type boiler _______________?

   A. heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
   B. water is supplied in durm and through down-comers located in atmospheric conditon it passes to the water wall and rises to drum in the form of mixture of water and steam
   C. feed pump is employed to supplement natural circulation in water wall type furnace
   D. water is converted into steam in one . pass without any recirculation
   E. water is fed at atmospheric pressure

6. Locomotive type’ boiler is__________________?

   A. horizontal multitubular water tube boiler
   B. water wall enclosed furnace type
   C. vertical tubular fire tube type
   D. horizontal multi-tubular fire tube type
   E. none of the above types

7. 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

8. 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

9. Thermal efficiency of well maintained boiler will be of the order___________________?

   A. 20%
   B. 40%
   C. 50%
   D. 75%
   E. 90%

10. Size of boiler tubes is specified by___________________?

    A. mean diameter and thickness
    B. inside diameter and thickness
    C. outside diameter and thickness
    D. outside diameter and inside diameter
    E. outside diameter alone