The water tubes in a babcock and wilcox boiler are__________________?

Related Mcqs:

1. The diameters of fire tubes and superheaer tubes in locomotive boiler are_________________?

   A. 47.5 mm, 130 mm
   B. 32.5 mm, 180 mm
   C. 65.5 mm, 210 mm
   D. 24.5 mm, 65 mm

2. 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

3. The diameter of internal flue tubes in a Lancashire boiler compared to its shell is_________________?

   A. one-half
   B. one-third
   C. one-fourth
   D. one-fifth
   E. two-fifth

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. The fire tubes in, a Coarran and Scotish marine boiler are_________________?

   A. horizontal
   B. vertical
   C. inclined
   D. both horizontal and vertical
   E. horizontal and inclined

6. The number of flue tubes in Lancashire boiler is_________________?

   A. zero
   B. one
   C. two
   D. four
   E. many

7. 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

8. The diameter of fire tubes in Cochran boiler is of the order of___________________?

   A. 2 cm
   B. 6 Cm ,
   C. 8 cm
   D. 12 cm
   E. 15 cm

9. 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

10. 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