Steam Engines objective questions with answers part5

Q1. Which of the following gases has the highest calorific value
(A) producer gas
(B) coal gas.
(C) water gas
(D) blast furnace gas

Q2. 100% efficiency of a thermal cycle cannot be achieved because of
(A) frictional losses
(B) it is not possible to achieve 0°K temperature
(C) leakage
(D) non-availability of ideal substance

Q3. For burning 1 kg of carbon to CO as per chemically correct combusiton, amount of air required is
(A) 12 kg
(B) 4/3kg
(C) 8/3kg
(D) 2 kg

Q4. The diameter of Cornish boiler is of the order of
(A) 1-2 m
(B) 1.5-2.5 m
(C) 2-3 m
(D) 2.5-3.5 m

Q5. The lenght of Cornish boiler is of the order of
(A) 2-4 m
(B) 3-5 m
(C) 5-7.5 m
(D) 7-9 m

Q6. 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

Q7. Steam engine operates on
(A) carnot cycle
(B) joule cycle
(C) Stirling cycle
(D) brayton cycle

Q8. The change in internal energy in steam engines equals to
(A) work done during the rankine cycle
(B) work done during compression.
(C) work done during adiabatic expansion
(D) change in enthalpy

Q9. Water tube boilers are those in which
(A) flue gases pass through tubes and water around it
(B) water passes through the tubes and flue gases around it
(C) work is done during adiabatic expansion
(D) change in enthalpy

Q10. Locomotive type’ boiler is
(A) horizontal multi tubular water tube boiler
(B) water wall enclosed furnace type
(C) vertical tubular fire tube type
(D) horizontal multi-tubular fire tube type

Q11. Fire tube boilers are those in which
(A) flue gases pass through tubes and water around it
(B) water passes through the tubes and flue gases around it
(C) forced circulation takes place
(D) tubes are laid vertically

Q12. Which of the following substance will have same percentage in both proximate and ultimate analysis
(A) ash
(B) volatile matter
(C) moisture
(D) hydrogen

Q13. The number of flue tubes in Lancashire boiler is
(A) zero
(B) one
(C) two
(D) four

Q14. Which of the following is a fire tube boiler
(A) locomotive boiler
(B) Babcock and Wilcox boiler
(C) Stirling boiler.
(D) all of the above

Q15. Which of the following is a water tube boiler
(A) locomotive boiler
(B) Cochran boiler
(C) Cornish boiler
(D) Babcock and Wilcox boiler

Q16. The diameter of cylindrical shell of the Lancashire boiler is of the order of
(A) 1 tp 1.25m
(B) 1 to 1.75 m
(C) 2 to 4 m
(D) 1.75 to 2.75 m

Q17. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are
(A) supplied by same manufacturer loose and assembled at site
(B) supplied mounted on a single base
(C) purchased from several parties and packed together at site
(D) packaged boiler does not exist

Q18. The biggest size of thermal power unit operating in India is
(A) 90 MW
(B) 100 MW
(C) 210 MW
(D) 500 MW

Q19. Which of the following coals has the highest calorific value
(A) anthracite coal
(B) bituminous coal
(C) lignite
(D) peat

Q20. The crown of the fire box is made hemispherical in order to
(A) give maximum space
(B) give maximum strength
(C) withstand pressure inside boiler ,
(D) resist intense heat in fire box