Practice Test: Question Set - 05
1. The equivalent evaporation is defined as
- (A) The ratio of
heat actually used in producing the steam to the heat liberated in the furnace
- (B) The
amount of water evaporated or steam produced in kg per kg of fuel burnt
- (C) The amount
of water evaporated from and at 100°C into dry and saturated steam
- (D) The
evaporation of 15.653 kg of water per hour from and at 100°C
2. Steam engine operates on
- (A) Carnot cycle
- (B) Joule cycle
- (C) Stirling cycle
- (D) Brayton cycle
3. De-Laval turbines are mostly used
- (A) Where
low speeds are required
- (B) For
small power purposes and low speeds
- (C) For
large power purposes
- (D) For
small power purposes and high speeds
4. In a Tandem type compound engine, the high pressure and low pressure cylinders
- (A) Have
common piston rod
- (B) Are set at
90°
- (C) Have
separate piston rods
- (D) Are
set in V-arrangement
5. 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
6. Blading efficiency is also known as
- (A) Stage
efficiency
- (B) Diagram
efficiency
- (C) Nozzle
efficiency
- (D) None of
these
7. In a single acting steam engine
- (A) The
steam is admitted on one side of the piston and one working stroke is produced
during each revolution of the crankshaft
- (B) The
steam is admitted, in turn, on both sides of the piston and one working stroke
is produced during each revolution of the crankshaft
- (C) The
steam is admitted on one side of the piston and two working strokes are
produced during each revolution of the crankshaft
- (D) The
steam is admitted, in turn, on both sides of the piston and two working strokes
are produced during each revolution of the crankshaft
8. Boiler H.P. is defined as the
- (A) Steam evaporation
rate per kg of fuel fired
- (B) Work done in
evaporating 1 kg of steam per hour from and at 100°C into dry saturated steam
- (C) The evaporation of
15.65 kg of water per hour from and at 100°C into dry saturated steam
- (D) Work done by 1 kg of
steam at saturation condition
9. Steam turbines may be classified according to
- (A) Direction
of steam flow
- (B) Number
of stages
- (C) Mode
of steam action
- (D) All
of these
10. The fire tubes in a Locomotive boiler has __________ diameter.
- (A) 4.75 mm
- (B) 5.47 mm
- (C) 7.45 mm
- (D) 47.5 mm
11. The safety valve at superheater as compared to drum safety valve setting is set at
- (A) Higher value
- (B) Lower value
- (C) Same value
- (D) Any value
12. In a compound steam engine, the first stage of expansion is carried out in a high pressure cylinder whereas the last expansion is completed in low pressure cylinder. The diameter of high pressure cylinder is _________ the low pressure cylinder.
- (A) Equal to
- (B) Less than
- (C) More than
- (D) None of
these
13. For combustion of a fuel, following is essential
- (A) Correct fuel air ratio
- (B) Proper ignition temperature
- (C) O₂ to support
combustion
- (D) All the three above
14. In an impulse reaction turbine, the pressure drops gradually and continuously over
- (A) Fixed blades
- (B) Moving
blades
- (C) Both
fixed and moving blades
- (D) None
of these
15. The efficiency of a boiler is defined as
- (A) Ratio
of heat actually used in producing steam to the heat liberated in the furnace
- (B) Ratio
of the mass of steam produced to the mass of total water supplied in a given
time
- (C) Ratio
of the heat liberated in the furnace to the heat actually used in producing
steam
- (D) None
of the above
Next Tests: