Steam Engines objective questions with answers part4

Q1. The fire tubes in, a Coarran and Scotish marine boiler are
(A) horizontal
(B) vertical
(C) inclined
(D) both horizontal and vertical

Q2. The diameter of internal flue tubes in a Lancashire boiler compared to its shell is
(A) one-half
(B) one-fourth
(C) one-fifth
(D) two-fifth

Q3. The basic purpose of drum in boiler is to
(A) serve as storage of steam
(B) serve as storage of feed water for water wall
(C) remove salts from water
(D) separate steam from water

Q4. Duplex feed pumps are used in small steam boilers. These operate on the principle of
(A) centrifugal pump
(B) axial flow pump
(C) ejector pump
(D) reciprocating pump

Q5. The best suited coal for chain or travelling grate stoker boiler is
(A) coking coal
(B) non coking or free burning coal
(C) pulverised coal
(D) high sulphur coal

Q6. In natural circulation type boiler,
(A) heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum
(B) feed pump is employed to supplement natural circulation in water wall type furnace
(C) water is converted into steam in one . pass without any recirculation
(D) water is fed at atmospheric pressure.

Q7. Hard coke is produced by carborisation of coal at
(A) atmospheric temperature
(B) 510-620°C
(C) 70O-850°C
(D) 95O-1100°C

Q8. Hard coke is used in
(A) cement industry
(B) thermal power plant
(C) blast furnace
(D) domestic use

Q9. Pick up the correct statement as regards Cornish boiler and Lancashire boiler
(A) cornish is fire tube and lancashire is water tube
(B) cornish is water tube and lancashire is fire tube
(C) cornish has two fire tubes and lancashire has one
(D) lancashire has two fire tubes and cornish has one

Q10. Locomotive boiler is of the following type
(A) multi tubular
(B) horizontal
(C) internally fired
(D) All of these

Q11. The shell diameter and length of locomotive boiler are
(A) 1.5 m, 4 m
(B) 1.5 m, 6 m
(C) 1 m, 4 m
(D) 2 m, 4 m

Q12. The diameters of fire tubes and superheaer tubes in locomotive boiler are
(A) 47.5 mm, 130 mm
(B) 32.5 mm, 160 mm
(C) 65.5 mm, 240 mm
(D) 24.5 mm, 65 mm

Q13. The water tubes in a babcock and wilcox boiler are
(A) horizontal
(B) vertical
(C) inclined
(D) horizontal and inclined

Q14. Which of the following varieties of coals is mostly used in steam boilers
(A) non-coking bituminous coal
(B) brown coal
(C) coking bituminous coal
(D) None of these

Q15. 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

Q16. The function of injector used in small steam plants is to
(A) create vacuum in furnace
(B) create vacuum at turbine exhaust
(C) pump feed water
(D) dose chemicals in feed water

Q17. Which of the following boilers is best suited to meet fluctuating demands
(A) babcock and wilcox
(B) locomotive
(C) lancashire
(D) cochran

Q18. 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) former is used for high installed capacity
(D) chances of explosion are less in former case.

Q19. The number of drums in Benson steam generator is
(A) one
(B) two
(C) one steam drum and one water drum
(D) no drum

Q20. A fusible plug is fitted in small boilers in order to
(A) avoid excessive build up of pressure
(B) avoid explosion
(C) extinguish fire if water level in the boiler falls below alarming limit
(D) control steam dome