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