| Post Name | Boiler Attendant - Kerala State Bamboo Corporation Ltd |
|---|---|
| Question Paper Code | 019/2024/OL |
| Category Code | 193/2023 |
| Date of Test | 13 March 2024 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
If a metre is divided into hundred equal parts, each part is equal to :
Answer
B. centimetre
2
Pascal is the unit of
Answer
A. Pressure
3
What is the dimensional formula of power?
Answer
A. MLĀ²Tā»Ā³
4
Which among the following is the correct relation between absolute pressure, atmospheric pressure and gauge pressure?
Answer
B. P_abs=P_atm+P_gauge
5
Which among the following is the unit of force (in SI system)?
Answer
B. Newton
6
Pyrometer is used to measure
Answer
C. Temperature
7
Which among the following is the unit of speciļ¬c heat in SI system?
Answer
D. J/kgK
8
The amount of heat energy required to raise the temperature of one kilogram of a substance through one degree Celsius is known as
Answer
C. Speciļ¬c heat
9
One bar is equal to
Answer
A. 10āµ N/mĀ²
10
The standard atmospheric pressure is taken as
Answer
A. 760 mm of Hg
11
The saturated liquid line and saturated vapour line meets at
Answer
C. Critical point
12
Heating dry steam above its saturation temperature is known as
Answer
B. Superheating
13
The steam having particles of water in suspension is termed as
Answer
C. Wet steam
14
The amount of heat absorbed to evaporate 1 kg of water from its saturation temperature, without change of temperature is known as
Answer
B. Latent heat of vaporization
15
If the pressure is increased the boiling temperature of water
Answer
A. Increases
16
Which among the following is not used for measuring dryness fraction?
Answer
D. Bomb calorimeter
17
Specific enthalpy of wet steam is given by
Answer
B. h=h_f+xh_fg
18
The numerical amount by which the temperature of a superheated vapour exceeds the saturation temperature is known as
Answer
C. Degree of super heat
19
The value of dryness fraction for dry steam is
Answer
A. 1
20
The speciļ¬c volume of water ___________ when heated from 0Ā°C.
Answer
C. First decreases and then increases
21
The steam generators designed to operate above critical pressure is known as
Answer
A. Once through boiler
22
_________ is an example for water tube boiler.
Answer
C. Sterling
23
Boiler rating usually deļ¬ned in terms of
Answer
D. Steam output in kg/h
24
Steam power plants work on which cycle
Answer
D. Rankine cycle
25
Draught in locomotive boiler is produced with the help of
Answer
A. Steam jet
26
Water circulation in Babcock Wilcox boiler is maintained by
Answer
B. Convective current
27
_________ is an example for high pressure boiler.
Answer
D. All of the above
28
Blowing down of boiler water is the process of
Answer
C. Controlling the solid concentration in the boiler water
29
________ is the platform in the furnace on which fuel is burnt.
Answer
B. Grate
30
Which of the following boiler has single internal ļ¬ue tube for hot gas passage?
Answer
C. Cornish
31
_________ is an example for low pressure boiler.
Answer
C. Scotch Marine
32
___________ is a part of steam generator in which phase change occurs.
Answer
B. Evaporator
33
Which of the following is a boiler accessories?
Answer
A. Economiser
34
Which component on boiler is used to increase the temperature of steam above saturation temperature?
Answer
C. Super heater
35
Regarding fusible plugs, which of the following claims is FALSE?
Answer
C. It should melt at very high temperatures
36
An air preheater
Answer
D. all of the above
37
Which of the following feed pump-related assertions is TRUE?
Answer
A. It serves as the boiler's feed water delivery system
38
What is the number of level indications in a boiler's water level indicator?
Answer
C. 2
39
What is the purpose of the boiler's pressure gauge?
Answer
A. To display the steam pressure as gauge pressure
40
A gauge similar to the steam stop valve is
Answer
C. Junction Valve
41
In essence, a feed check valve is a ___________ way valve.
Answer
B. One
42
What is the purpose of a boiler's blowdown valve?
Answer
A. To get rid of sludge
43
What a safety valve does is?
Answer
D. Regulates excessive steam pressure inside the boiler
44
Which of the following is not a boiler mounting?
Answer
D. None of the above
45
The function of _________ is to separate the water particle in suspension that are carried by the steam coming from the boiler.
Answer
C. Steam separator
46
Turbine draught is another name for
Answer
B. Forced draught
47
The draught system that is mostly used by Modern boilers are of
Answer
B. Balanced draught ļ¬ring
48
A locomotive boiler generally utilises a
Answer
C. Induced steam jet draught
49
A chimney is 20 m high and the temperature of hot gases inside the chimney is 327Ā°C. The temperature of outside air is 27Ā°C and furnace is supplied with 10 kg of coal burnt. Then, the draught head in metres of hot gases is
Answer
A. 18.18 m
50
In comparing an induced draught fan with respect to a forced draught fan, the operation and maintenance cost of induced draught fan will be
Answer
B. Higher for same conditions
51
Draught loss is due to
Answer
D. All of these
52
An induced draught blower is usually placed
Answer
B. Near to the base of the chimney
53
Read the statements: (i) Induced draught blowers are larger in size in comparison to Forced draught fan (ii) Forced draught fans requires more power in comparison to induced draught fan (iii) Induced draught fans require special bearings to handle the ļ¬ue gas (iv) Forced draught fans can be 1.3 times in size in comparison to Induced draught fan Which of the given statement are true?
Answer
C. Statements 1 and 3 only
54
Boilers when operating in balanced draught the pressure will be
Answer
C. Slightly negative gauge pressure
55
Which of the below mentioned phrase is not true with respect to natural draught system?
Answer
D. High eļ¬ciency
56
The evaporative capacity of a boiler may be expressed in terms of
Answer
D. All of the above
57
In the following statements regarding direct method for boiler eļ¬ciency which option is not true?
Answer
B. Calculate various losses accountable for various eļ¬ciency levels
58
The eļ¬ciency which represents the eļ¬ectiveness of the burner only and relates to its ability to completely burn the fuel
Answer
A. Combustion Eļ¬ciency
59
The instrument which regulates the ļ¬ow of water under pressure to the boiler drum is
Answer
C. Feed Check Valve
60
Whenever boiler cleaning and inspection are due water inside the tubes and in the boiler, drum can be completely drained by operating the
Answer
A. Blow oļ¬ Cock
61
The ratio of heat received by 1 kg of water under working conditions to that received by 1 kg of water evaporated from and at 100Ā°C
Answer
B. Factor of Evaporation
62
The equivalent evaporation (kg/h) of a boiler producing 1200 kg/h of steam with enthalpy 2543 kJ/kg from feed water at 70Ā°C is: take enthalpy of vaporization of water at 100Ā°C = 2250 kJ/kg.
Answer
A. 1200
63
Which of the mentioned statement is not generally a result of boiler trial?
Answer
B. Boiler safety check
64
The lowest grade coal containing moisture as high as 30% and high volatile matter is
Answer
C. Lignite
65
The analysis which gives the chemical elements that comprise the coal substance, together with ash and moisture is known as
Answer
B. Ultimate analysis
66
The primary component of Liqueļ¬ed Petroleum Gas is
Answer
A. Butane
67
Bomb calorimeter is one of the ways to get the heating value of solid and liquid fuels when burnt at
Answer
B. Constant Volume
68
Which is the best suited fuels for CI engine, considering knocking tendency?
Answer
C. Paraļ¬ns
69
Gasoline has a speciļ¬c gravity in the range of about
Answer
B. 0.70 - 0.78
70
The gas obtained by partial combustion of coke or coal in the presence of air and steam mixture is
Answer
A. Producer gas
71
Caloriļ¬c value obtained from a bomb calorimeter is
Answer
B. Higher caloriļ¬c value
72
Which of the following statement regarding gaseous fuel is not true in comparison to solid or liquid fuels?
Answer
C. They have low heat content
73
The fuel which is the cleanest of the fossil fuel is
Answer
D. Natural Gas
74
_________ moles of nitrogen are present for every mole of oxygen in the air.
Answer
A. 3.76
75
Density is measured by an instrument called
Answer
B. Hydrometer
76
Flash point for furnace oil is
Answer
D. 66Ā°C
77
The pour point of a fuel is the lowest temperature at which it will pour or ļ¬ow when ___________ under prescribed conditions.
Answer
C. Cooled
78
The primary function of burner is to __________ fuel to millions of small droplets.
Answer
B. Atomise
79
Inspection procedure of boilers for the renewal of certiļ¬cates is to apply along with fees as per __________ before expiry of the certiļ¬cate.
Answer
A. Annexure C
80
The higher caloriļ¬c value of fuel whose composition is C=86%, S=6%, incombustible=8%
Answer
C. will be same as than its lower caloriļ¬c value
81
Bomb calorimeter is used to determine the caloriļ¬c value of
Answer
B. Solid as well as liquid fuels
82
Orsat apparatus is used to determine
Answer
B. Products of only dry constituents of fuel combustion by volume
83
Proximate analysis of fuel means, determination
Answer
D. Percentage of ļ¬xed carbon, ash, volatile matter and moisture
84
The ratio of speciļ¬c heats of gas at constant pressure and constant volume is
Answer
C. always varies with temperature
85
The speciļ¬c volume of water when heated from 0 degree C
Answer
B. First decrease and then increase
86
The temperature of ļ¬ue gases entering the air preheater of steam generator installation is recommended to be
Answer
D. more than dew point temperature
87
Turbidity in a boiler feed water causes
Answer
C. Sludge
88
Thermal conductivity of water
Answer
A. First increases with temperature and then decreases with temperature
89
Which is not the desirable property of a good fuel?
Answer
C. High ignition point
90
Oxygen can be removed from the boiler feed water by the addition of
Answer
C. Sodium sulphite
91
What salts of calcium and magnesium cause temporary hardness of boiler feed water?
Answer
A. Bicarbonate
92
The economiser unit of a boiler is located between
Answer
B. Superheater and air preheater
93
What is the function of a steam trap?
Answer
B. To drain oļ¬ water resulting from partial consideration of steam in pipes
94
Superheating of steam is done at
Answer
C. Constant pressure
95
The maximum energy loss in a boiler occurs due to
Answer
D. Flue gases
96
Which of the following ļ¬tting is a boiler mounting?
Answer
C. Feed check valve
97
Dryness fraction of wet steam is given by
Answer
C. Ratio of mass of dry steam to the sum of mass of suspended liquid water and dry steam
98
If a fan is installed near the base of a boiler to force air through fuel and another fan is installed near the base of the chimney to suck the gas from boiler, the type of draught produced is called
Answer
D. Balanced draught
99
A benson boiler requires
Answer
A. No drum
100
Equivalent evaporation means
Answer
D. Amount of water evaporated from and at 100 degree in to dry and saturated steam at normal atmospheric pressure
Discussion
Ask a doubt or share a tip.
No comments yet ā start the discussion.