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Book 1 > Chapter 13-14 > Flashcards

Chapter 13-14 Flashcards

1
Q 
The combustion triangle is made up of\_\_\_\_\_?
A) Heat; light; ignition
B) Fuel; light; heat
C) Fuel; gases; ignition
D) Fuel; oxygen; heat
E) Fuel; CO2: CO
A

D) Fuel; oxygen; heat

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2
Q 
A highly poisonous gas which results from incomplete combustion is\_\_\_\_\_?
A) Carbon monoxide
B) Hydrogen sulphide
C) Carbon dioxide
D) Sulphur dioxide
E) NOx
A

A) Carbon monoxide

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3
Q 
Efficient combustion is achieved by controlling the\_\_\_\_\_?
A) Fuel-air ratio
B) Steam-water ratio
C) Water-fuel ratio
D) Steam-fuel ratio
E) Fuel- NOx ratio
A

A) Fuel-air ratio

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4
Q

The main function of a gas burner is to _____?
A) Atomize the gas
B) Provide mixing of the gas and combustion air
C) Direct the fuel into the furnace
D) Control the fuel pressure
E) Control the gas flow

A

B) Provide mixing of the gas and combustion air

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5
Q 
Smoke is the result of \_\_\_\_\_?
A) Wet fuel
B) Incomplete combustion
C) Complete combustion
D) High temperature
E) Water vapor
A

B) Incomplete combustion

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6
Q 
The most common solid fuel used in boilers is \_\_\_\_\_?
A) Wood chips
B) Coal
C) Bark
D) Shredded tires
E) Pellets
A

B) Coal

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7
Q 
LPG means \_\_\_\_\_?
A) Low pressure gauge
B) Level playing ground
C) Liquefied petroleum gas
D) Limited production gas
E) Liquid pentane gas
A

C) Liquefied petroleum gas

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8
Q 
When carbon burns completely by combining with the oxygen in the air, heat is produced along with the waste gas \_\_\_\_\_?
A) Nitrogen oxide
B) Hydrogen oxide
C) Carbon dioxide
D) Carbon tetrachloride
E) Hydrogen dioxide
A

C) Carbon dioxide

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9
Q 
Heat passes through the metal of heating surfaces by \_\_\_\_\_?
A) Radiation
B) Conduction
C) Convection
D) Radiation and conduction
E) Convection and radiation
A

B) Conduction

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10
Q 
A type of plant which would make common use of coal as a boiler fuel would be a \_\_\_\_\_?
A) Gas plant
B) Power generating plant
C) Pulp mill
D) Chemical fertilizer facility
E) Refuse plant
A

B) Power generating plant

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11
Q 
11. Delayed ignition resulting in puff back during furnace light up can be caused by improper adjustment of the igniter electrodes, poor igniter cable insulation and \_\_\_\_\_?
A) Too much air
B) Too weak ignition spark
C) Too much gas
D) Too little air
E) Too little amperage
A

B) Too weak ignition spark

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12
Q 
Flame propagation is \_\_\_\_\_?
A) Speed of the air admission to a furnace
B) Speed of burning
C) Speed of mixing of gas and air
D) Spreading of fire
E) A and D
A

B) Speed of burning

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13
Q 
If a furnace used a forced draft fan to produce draft, the fumace pressure is \_\_\_\_\_?
A) Positive
B) High
C) Negative
D) Balanced
E) Partial vacuum
A

A) Positive

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14
Q 
Combustion efficiency in a boiler can be measured with a/an \_\_\_\_\_?
A) Manometer
B) Fuel analyzer
C) Flue gas analyzer
D) Hydrometer
E) Calorimeter
A

C) Flue gas analyzer

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15
Q 
As air cools, it becomes heavier, fall toward the floor and is replaced by warmer air which in turn gives up heat. In this, \_\_\_\_\_ currents are set up and heat is lost.
A) Infiltration
B) Conduction
C) Convection
D) Electrical
E) Radiation
A

C) Convection

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16
Q 
The combination of carbon and hydrogen, results in the formation of \_\_\_\_\_?
A) Hydrocarbons
B) Hydrogencarbons
C) Carbohydrates
D) Hypercarbons
E) Water
A

A) Hydrocarbons

17
Q 
The hydrogen sulphide removed from natural gas is converted to \_\_\_\_\_?
A) Sulphuric acid
B) Sulphur
C) Elemental hydrogen
D) A sulphurous compound
E) Sulphur dioxide
A

B) Sulphur

18
Q 
\_\_\_\_\_ forms the greatest percentage of the combustible elements in coal
A) Hydrogen
B) Carbon
C) Sulphur
D) Methane
E) Pentane
A

B) Carbon

19
Q 
The ratio of the amount of heat absorbed by the water in the boiler, to the amount of heat actually generated by the burning of the fuel in the furnace, shows \_\_\_\_\_?
A) Fuel efficiency
B) Furnace efficiency
C) Boiler capacity
D) Combustion efficiency
E) Burner efficiency
A

D) Combustion efficiency

20
Q 
The air supplied around the outside of the boiler burner is referred to as \_\_\_\_\_?
A) Tertiary air
B) Quadrilateral air
C) Secondary air
D) Primary air
E) Supplemental air
A

C) Secondary air

21
Q 
A flue gas analyzer measures the percentage of \_\_\_\_\_ in the flue gas.
A) Methane
B) O2, H and Temperature
C) N, H, and CO2
D) O2 and CO
E) O2 and CO2
A

E) O2 and CO2

22
Q

Furnace heating surface temperatures are normally kept below dangerous levels by _____?
A) Water in contact with these surfaces
B) The use of excess air to cool the furnace down
C) The use of mechanical rather than natural draft
D) Passing steam over them
E) Using combustible baffles

A

A) Water in contact with these surfaces

23
Q

To check the pilot flame system _____?
A) Close the main fuel valve while the boiler is operating
B) Close the main fuel valve prior to start up
C) Remove and cover the scanner during the pilot light up period
D) Observe pilot flame during post purge
E) Close the igniter fuel valve

A

B) Close the main fuel valve prior to start up

24
Q 
The main component of natural gas is \_\_\_\_\_?
A) Ethane
B) CH4
C) Methane
D) Propane
E) B and C
A

C) Methane

25
Q 
A major disadvantage of incomplete combustion besides the formation of CO and soot is \_\_\_\_\_?
A) Heat gain
B) Carry over
C) Ozone production
D) Hydrogen production
E) Heat loss
A

E) Heat loss

26
Q 
Carbon monoxide is \_\_\_\_\_?
                    1. Flammable
                    2. An Asphyxiant
                    3. By product of incomplete combustion
                    4. Heavier than air
A) 1 and 2
B) 1, 2 and 3
C) 1, 3 and 4
D) 2, 3 and 4
E) 2 and 3
A

B) 1, 2 and 3

27
Q 
The breaking up of fuel oil into tiny particles by steam, air or mechanical means, so that it can be properly burned by mixing with oxygen in the air, is known as \_\_\_\_\_?
A) Spraying
B) Fanning
C) Molecularization
D) Vaporization
E) Atomization
A

E) Atomization

28
Q 
Draft which is produced by a fan or a blower is called \_\_\_\_\_ draft?
A) Automatic
B) Mechanical
C) Involuntary
D) Natural
E) Forced
A

B) Mechanical

29
Q 
If soot and ashes are left in the boiler while it is idle, rapid corrosion may occur due to the presence of \_\_\_\_\_?
A) Hydrogen
B) Sulphur
C) Carbon
D) Zeolite
E) Heat
A

B) Sulphur

30
Q

When high excess air is supplied to the furnace of a boiler _____?
A) The efficiency of the boiler increases
B) The air carries a large amount of heat out the stack
C) Carbon monoxide is formed which is explosive and poisonous
D) It causes black smoke
E) Secondary mixing is required

A

B) The air carries a large amount of heat out the stack

31
Q 
The chemical symbol for water vapor is \_\_\_\_\_?
A) N2
B) CO2
C) S2O
D) H2O
E) H2O2
A

D) H2O

32
Q 
Air is comprised of \_\_\_\_\_?
A) 50 parts oxygen; 50 parts nitrogen
B) 60 parts oxygen; 40 parts nitrogen
C) 21 parts oxygen; 79 parts nitrogen
D) 90 parts oxygen; 10 parts nitrogen
E) 79 parts oxygen; 21 parts nitrogen
A

C) 21 parts oxygen; 79 parts nitrogen

33
Q 
To have complete combustion of a fuel, there must be enough air, time, temperature and \_\_\_\_\_?
A) Torque
B) Tempo
C) Turbulence
D) Tumbalance
E) Telemetry
F) Pressure
A

C) Turbulence

34
Q 
When a forced draft fan fails your first action should be \_\_\_\_\_?
A) Blowdown the boiler
B) Shut off the fuel supply
C) Release the safety valve
D) Test the water level
E) Increase the draft
A

B) Shut off the fuel supply

35
Q

The low-gas pressure cut-off should be checked by _____?
A) Adjusting the gas pressure regulator
B) Closing the main gas cock while only the pilot is burning
C) A jurisdictional Inspector
D) Closing the main gas cock during operation, preferably at low load
E) Closing the main gas cock during the purge period

A

D) Closing the main gas cock during operation, preferably at low load

Book 1 (3 decks)

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