A. give maximum space
B. give maximum strength
C. withstand pressure inside boiler ,
D. resist intense heat in fire box
E. enable easy,manufacture
Related Mcqs:
- 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 - Boiler stays are used to___________________?
A. prevent flat surfaces under pressure from tearing apart
B. take care of failure in shear
C. take care of failure in compression
D. provide support for boiler
E. provide foundation of boiler - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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
