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A. drooping characteristic
B. linear characterisstic
C. rising characteristic
D. flat characteristic
Answer
C. rising characteristic
Submitted by: Imdad Shahani
In which of the following boilers, the draught in furnace is increased by utilising exhaust steam from engine?
A. Lancashire boiler
B. locomotive boiler
C. Babcock and Wilcox boiler
D. Cochran boiler
Answer
B. locomotive boiler
Submitted by: Imdad Shahani
The radius of a dished head is taken approximately as?
A. one-fourth
B. half
C. one
D. two
Answer
C. one
Submitted by: Imdad Shahani
Thermal efficiency of a thermal power plant is of the order of?
A. 15%
B. 20%
C. 30%
D. 45%
Answer
C. 30%
Submitted by: Imdad Shahani
Pick up wrong statement about desired properties of a good fuel?
A. high calorific value
B. produce minimum smoke and gases
C. ease in storing
D. high ignition point
Answer
D. high ignition point
Submitted by: Imdad Shahani
Which is not correct statement about pulverised fuel firing ?
A. high burning rate is possible
B. heat release can be easily controlled
C. fuel burns economically
D. it is the best technique for burning high ash content fuel having low fusion ash
Answer
D.
Submitted by: Imdad Shahani
Which is not correct statement about the function of furnace?
A. to provide proper conditions for con-tinuous complete combustion
B. mix fuel with air and ignite
C. separate ash from coal
D. maintain heat supply to prepare and ignite the incoming fuel
Answer
C. separate ash from coal
Submitted by: Imdad Shahani
Which is not correct statement about effect of sulphur in fuel ?
A. it has heating value
B. it helps in electrostatic precipitation of ash in flue-gases
C. it leads to corrosion of air heaters, ducting, etc. if flue gas exit temperature is low
D. it erodes furnace walls
Answer
D. it erodes furnace walls
Submitted by: Imdad Shahani
Which one of the following can be taken as the measure of electric intensity?
A. F/A
B. V/A
C. VF/A
D. q/VA
Answer
B. V/A
Submitted by: Rasool Bux
Electric flux due to a point charge +q is?
A. 1/4IIɛ q/r
B. q/ɛ0
C. 1/4IIɛ0. q/r2
D. 4IIɛ0
Answer
B. q/ɛ0
Submitted by: Rasool Bux