Month: January 2019

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

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

A. corrosion
B. scale
C. carryover
D. embrittlement
E. all of the above

A. regulate flow of boiler water
B. check level of water in boiler drum
C. recirculate unwanted feed water
D. allow high pressure feed water to flow to drum and not allow reverse flow to take place
E. none of the above

A. convection
B. radiation
C. conduction
D. radiation and conducton
E. radiation and convection

A. 1 kg/cm
B. 6 kg/cm
C. 17 kg/cm2
D. 100 kg/cm2
E. 250 kg/cm2

A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. first decreases and then increases

A. increases
B. decreases
C. remains unaffected
D. first increases and then decreases
E. unpredictable

A. 100 kg/cm2 and 540°C
B. 1 kg/cm2 and 100°C
C. 218 kg/cm2 abs and 373°C
D. 218 kg/cm2 abs and 540°C
E. 100 kg/cm2 abs and 373°C

A. unburnt carbon in ash
B. incomplete combustion
C. ash content
D. flue gases
E. radiation losses