Steam Nozzles MCQ with Answers - Set 26 - ObjectiveBooks

# Practice Test: Question Set - 26

1. Which of the following gases has the highest calorific value?
(A) Producer gas
(B) Coal gas
(C) Water gas
(D) Blast furnace gas

2. The maximum steam pressure in a Locomotive boiler is limited to
(A) 0.18 MN/m²
(B) 1.8 MN/m²
(C) 18 MN/m²
(D) 180 MN/m²

3. 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

4. The ratio of heat equivalent to brake power to the energy supplied in steam is known as
(A) Mechanical efficiency
(B) Overall efficiency
(C) Indicated thermal efficiency
(D) Brake thermal efficiency

5. The difference between Cornish boiler and Lancashire boiler is that
(A) Former is fire tube type and latter is water tube type boiler
(B) Former is water tube type and latter is fire tube type
(C) Former contains one fire tube and latter contains two fire tubes
(D) None of the above

6. The function of a piston in a steam engine is
(A) To guide motion of the piston rod and to prevent it from bending
(B) To transfer motion from the piston to the cross-head
(C) To convert heat energy of the steam into mechanical work id) to exhaust steam from the cylinder at proper moment
(D) None of these

7. The pressure of reheat steam after passing through reheater compared to inlet condition is
(A) More
(B) Less
(C) Equal
(D) May be more or less depending on capacity of reheater

8. Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and
(A) Indicated power
(B) Brake power
(C) Efficiency
(D) Pressure of steam

9. Secondary air is the air used to
(A) Provide air around burners for obtaining optimum combustion
(B) Transport and dry the coal
(C) Convert CO (formed in lower zone of furnace) into CO₂ at higher zone
(D) Air delivered by induced draft fan

10. The function of a flywheel is
(A) To convert reciprocating motion of the piston into rotary motion
(B) To convert rotary motion of the crankshaft into to and fro motion of the valve rod
(C) To prevent fluctuation of speed
(D) To keep the engine speed uniform at all load conditions

11. During storage, the heating value of coal
(A) Increases
(B) Decreases
(C) Remain constant
(D) May increase or decrease depending upon the method of storage

12. A closed vessel made of steel and used for the generation of steam is called a
(A) Steam boiler
(B) Steam turbine
(C) Steam condenser
(D) Steam injector

13. The shell of the Cochran boiler is made hemispherical
(A) To give maximum space and strength
(B) To withstand the pressure of steam inside the boiler
(C) Both (A) and (B)
(D) None of the above

14. Sublimation region is the region where
(A) Solid and vapor phases are in equilibrium
(B) Solid and liquid phases are in equilibrium
(C) Liquid and vapor phases are in equilibrium
(D) Solid, liquid and vapor phases are in equilibrium

15. The ratio of brake power to the indicated power is known as
(A) Mechanical efficiency
(B) Overall efficiency
(C) Indicated thermal efficiency
(D) Brake thermal efficiency

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