A. more heating surface
B. less heating surface
C. equal heating surface
D. heating surface depends on other parameters
E. none of the above
Related Mcqs:
- 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 - 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 - 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 - 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 - Fire tube boilers are limited to a maximum design working pressure of ____________________?
A. 1 kg/cm
B. 6 kg/cm
C. 17 kg/cm2
D. 100 kg/cm2
E. 250 kg/cm2 - 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 - 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 - 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 - 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
