Fire tube boilers are limited to a maximum design working pressure of ____________________?

Related Mcqs:

1. Pick up the wrong statement about water tube boiler in comparison to fire tube boilers ______________________?

   A. former generates steam at high pressure
   B. former occupies less space for same power
   C. rate of steam flow is more in former case
   D. former is used for high installed capacity
   E. chances of explosion are less in former case

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. 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

4. 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

5. Steam in water tube boiler as compared to fire tube boiler_________________?

   A. can be raised rapidly
   B. is raisd at slower rate
   C. is raised at same rate
   D. could be raised at fast/slow rate depending on design
   E. none of the above is true

6. In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle 9. Sensitivity of inclined tube to sensitivity of U-tube is equal to________________?

   A. sin 9
   B. sin 9
   C. cas 9
   D. cos 9
   E. tan 9

7. Water 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. work is done during adiabatic expansion
   D. change in enthalpy
   E. none of the above

8. In locomotive boiler, maximum steam pressure is limited to_______________?

   A. 1 kg/cm2
   B. 5 kg/cm2
   C. 10 kg/cm2
   D. 18 kg/cm2
   E. 31 kg/cm2

9. Which of the following is a fire tube boiler________________?

   A. locomotive boiler
   B. Babcock and Wilcox boiler
   C. Stirling boiler.
   D. all of the above
   E. none of the above

10. The diameter of fire tube of Cornish boiler compared to its shell is__________________?

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