| Post Name | FIREMAN - KERALA KERAKARSHAKA SAHAKARANA FEDERATION LIMITED |
|---|---|
| Question Paper Code | 142/2025 |
| Category Code | 430/2024 |
| Date of Test | 5 November 2025 |
| Medium of Question | ENGLISH |
| Exam Type | OMR Examination |
| Total Questions | 100 |
1
Which period referred to as the ‘golden’ hours for an injured person?
Answer
C. First 30 minutes after incident
2
How many basic categories of safety signs used in industries?
Answer
D. 4
3
What is the accuracy of a try square?
Answer
C. 0.002 mm/10 mm length
4
Which is the minimum angle can file by a knife edge file?
Answer
C. 10°
5
Which part of the micrometer is used for maintain equal pressure in between measuring
faces?
Answer
C. Ratchet stop
6
What is the purpose of diamond point chisels?
Answer
D. Squaring metal at corners and joints
7
What is the minimum thickness of feeler gauge leave in B.I.S set?
Answer
C. 0.03 mm
8
What is the class of fire involving gas and liquified gas?
Answer
C. Class C
9
Which extinguisher is most suitable for class D fire?
Answer
A. Dry powder extinguisher
10
Each question is provided with four choices
Answer
C. and
11
Which is the unit of acceleration in S.I. system?
Answer
D. Meter/Square second
12
One cent is equal to :
Answer
D. 436 square feet
13
Which formula used for find Relative density or specific gravity of a substance?
Answer
A. Density of substance / density of water at 4 degree C
14
Choose the correct statement about acceleration :
Answer
A. It is change in velocity/time
15
What is the unit of heat in S.I. system?
Answer
C. Joule
16
Which instrument used for measure very high temperature in furnaces?
Answer
A. Pyrometer
17
Pascal’s law is connected with :
Answer
C. Pressure
18
What is the accuracy of vernier bevel protractor?
Answer
A. 5 minutes
19
Thermocouple pyrometer can measure temperature upto :
Answer
C. 1539°C
20
What is the boiling point of water?
Answer
D. 212°F
21
The top surface that connects the two adjoining flanks of a thread is called :
Answer
B. Crest
22
This type of bolt assembly is used when the relative movement between the work pieces
has to be prevented :
Answer
C. Body fit bolt
23
These nuts have special provision in the form of slots for fixing split pins for locking the
nuts :
Answer
A. Castle Nuts
24
These keys are used for transmitting very low torque. No keyway is made on the shaft :
Answer
D. Saddle Key
25
Hatchet Stake having :
Answer
A. Sharp straight edge, beveled along one side
26
This Seam is used as a longitudinal corner seam for various types of pipes such as duct
work, The single lock is placed in a pocket lock :
Answer
C. Pittsburgh Seam
27
Sizes of Rivets are determined by the :
Answer
D. Diameter and the length of the shank
28
Open end spanners are :
Answer
C. Single end or Double End Spanners
29
Which key is a semicircular in shape used for transmitting light torque?
Answer
A. Woodruff key
30
Which is used for closing a pipeline having an internal thread?
Answer
B. Plug
31
Dry saturated steam means :
Answer
B. Dry steam is further heated at constant pressure
32
Volume of one kilogram of superheated steam is :
Answer
A. Greater than the volume of one kilogram of dry saturated steam at the same
pressure
33
In this type of draught system the fan is placed near or at the base of chimney so that a
vacuum is created in the furnace :
Answer
C. Negative or Induced air draught
34
The amount of heat energy required to convert a unit mass of ice at 0°C into water at the
same temperature is called :
Answer
B. Latent heat of ice
35
The energy required to change a unit mass of liquid into gas at its boiling point, without
change in temperature is called :
Answer
D. Latent heat
36
The temperature at which water starts boiling depends upon :
Answer
B. Pressure of water
37
Volume occupied by a unit mass of a substance is called :
Answer
A. Specific Volume
38
It represents the amount of additional heat energy added to a gas beyond its boiling
point at a constant pressure :
Answer
C. Degree of Superheat
39
The sum of a thermodynamic system’s internal energy and the product of its pressure
and volume is called :
Answer
D. Enthalpy
40
The quantity of heat required to convert one kilogram of water at 0°C, at constant
pressure, into wet steam is called :
Answer
B. Enthalpy
41
According to their use Steam boilers may be classified as :
Answer
A. Stationary and Mobile Boilers
42
Cochran Boiler is :
Answer
C. Vertical Multitubular boiler
43
Boiler shells are made of :
Answer
D. Steel Plates
44
In Lancashire boiler ___________ is fitted at the end of side flues to control the draught?
Answer
A. Damper
45
Which of the following boilers uses forced circulation?
Answer
D. La-mont boiler
46
Simple vertical boilers generally used for :
Answer
A. Low power generation
47
Boilers are classified into :
Answer
D. All of the above
48
The Benson boiler is also known as
Answer
B. Light weight boiler
49
Which boiler makes use of pressurised combustion?
Answer
C. Velox boiler
50
The diameter of flue tube of a Cornish boiler may be about :
Answer
D. 0.6 times that of the shell
142/2025 8 A
51
Which is used to recover heat from the exhaust flue gas?
Answer
C. Air preheater
52
In locomotive and marine boilers which safety valve is used?
Answer
A. Spring loaded safety valve
53
Which of the following are boiler mountings?
Answer
D. All of the above
54
Which boiler mounting is used to protect the boiler against damage due to overheating
for low water level?
Answer
C. Fusible plug
55
Use of superheater is :
Answer
A. To increase the temperature of saturated steam
56
Which of the following is not a boiler mounting?
Answer
D. Air preheater
57
How many safety valves are usually provided in a steam boiler?
Answer
C. 2
58
Which safety valve is used for stationary boilers?
Answer
B. Dead weight safety valve
59
Mud and scale are removed by :
Answer
A. Blow-off-cock
60
Boiler accessories are used to :
Answer
D. To increase boiler efficiency
61
Which device produces natural draught in a boiler system?
Answer
B. Chimney
62
What is the main function of a chimney in a boiler system?
Answer
C. Remove flue gases
63
What type of steam has no moisture particles?
Answer
C. Dry steam
64
When is draught said to be forced in a boiler system?
Answer
B. When a fan is placed before the furnace
65
What should be the chimney height for maximum discharge conditions?
Answer
D. Density difference reaches maximum possible
66
Which type of draught system uses both induced and forced fans together?
Answer
B. Balanced draught
67
What is the efficiency of a chimney defined as?
Answer
A. Ratio of actual draught to theoretical draught
68
Which draught system works with both induced and forced draught fans
simultaneously?
Answer
A. Balanced draught
69
Which relation is used to calculate the power required for a draught fan?
Answer
A. Mass flow rate × draught head / efficiency
70
Where is steam jet draught most suitably applied?
Answer
B. Small vertical boilers and locomotives
71
Which of the following is a solid fuel?
Answer
C. Coal
72
Which instrument is commonly used to measure the calorific value of solid and liquid
fuels?
Answer
A. Bomb Calorimeter
73
Which of the following is a gaseous fuel?
Answer
B. LPG
74
The calorific value of a fuel is expressed in which unit?
Answer
C. kcal/kg
75
Which of the following best defines ‘Equivalent Evaporation’ of a boiler?
Answer
B. Steam generated from water at 100°C to dry saturated steam at 100°C
76
Which of the following parameters is usually considered in a boiler trial?
Answer
A. Fuel mass consumed
77
In Bomb Calorimeter, the purpose of using oxygen under high pressure is to :
Answer
B. Ensure complete combustion of fuel sample
78
Which of the following factors decreases boiler efficiency?
Answer
C. Fouling and scaling on heating surfaces
79
In a boiler trial, heat losses due to unburnt carbon in ash primarily indicate :
Answer
B. Incomplete combustion of fuel
80
Which of the following does NOT directly affect boiler house heat losses?
Answer
D. Quality of feed water treatment
81
What are the main constituents of fuel?
Answer
B. Hydrogen and Carbon
82
Which statement is true based on radiation?
Answer
A. Heat is transferred through electro magnetic waves
83
Which thermodynamic law says that “Heat and mechanical work are mutually
convertible”?
Answer
B. First law of thermo dynamic
84
The device used to analyze flue gas sample is
Answer
A. Orsat apparatus
85
Bicarbonates of calcium and magnesium responsible for ___________ of water.
Answer
D. Temporary hardness
86
Which fuel is renewable obtained from living organisms?
Answer
C. Biomass fuel
87
Which material used to make boiler tubes?
Answer
B. Alloy steel
88
If boiler water ‘ph’ drop below 8.5 the phenomenon called
Answer
A. Waterside thinning
89
To control growth of bacteria and algae, which treatment is used?
Answer
D. Biocide treatment
90
Water used in boiler is called
Answer
B. Boiler feed water
91
Which test is used to check leakage in pressure parts?
Answer
A. Hydro test
92
As per boiler act-1923 what is the period of certificate for use of boiler?
Answer
D. One year
142/2025 13 A
93
Boiler is restarted after a short duration of outage is called?
Answer
B. Hot startup
94
Starvation means
Answer
A. No water inside tube, tube overheat
95
As per Indian boiler act, which section discuss about penalities for illegal use of boiler?
Answer
A. Section-23
96
Which non-destructive test is used to check welding defect in pipe and tubes of boiler?
Answer
C. Radiographic test
97
Where is fusible plug mounted?
Answer
A. At lowest permissible water level
98
When hydrostatic test conducted?
Answer
C. Once in a year
99
To maintain ‘ph’ in cooling water which acid is added?
Answer
B. Sulphuric acid
100
Validity of Provisional order for permitting the boiler to be used
Answer
D. Six months
————————
142/2025 14 A
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