Multiple Choice Questions on Steam Boilers
11- Which of the following boiler utilizes the combination of suspension firing and grate firing?
(A) traveling grate stoker boiler
(B) packaged boiler
(C) spreader stoker boiler
(D) pulverized fuel boiler
12- Once-through boilers will have
(A) drum
(B) header
(C) pump
(D) steam separator
13- One kilowatt-hour energy is equivalent to
(A) 1000 J
(B) 360000 J
(C) 3600000 J
(D) 3600000 W
14- Which of the following is a fire tube boiler?
(A) Locomotive boiler
(B) Babcock and Wilcox boiler
(C) Velox boiler
(D) All of the above
15- Proximate analysis of fuel is determination of percentage of
(A) carbon, hydrogen, nitrogen, Sulphur, moisture
(B) fixed carbon, ash, volatile matter, moisture
(C) higher calorific value
(D) lower calorific value
16- Which of the following boilers is best suited to meet fluctuating demands?
(A) Babcock and Wilcox
(B) Locomotive
(C) Lancashire
(D) Cochran
17- Secondary air is the air used to
(A) reduce the flame length
(B) increase the flame length
(C) transport and dry the coal
(D) provide air round the burners for getting optimum combustion
18- 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
19- Ceramic coating is used in furnaces because it enhances
(A) conductivity
(B) convective heat transfer coefficient
(C) emissivity
(D) radiation factor
20- With regard to a steam boiler, the lettering “HRT” means
(A) highly regulated temperature
(B) hot returns tubes
(C) horizontal return tubular
(D) highly regulated treatment
ANSWERS:
11-(C), 12-(C), 13-(C), 14-(A), 15-(B), 16-(B), 17-(D), 18-(A), 19-(C), 20-(C)