2/5/25, 2:06 PM
G3-1-ON-110
Quiz Results "G3-1-ON-110"
94%
Passed
Date/Time
September 23, 2024 2:52 PM
User ID:
gulzar
Email:
g@gmail.com
Answered:
103 / 110
Student Score
1030 / 1100 (94%)
Passing score
880 (80%)
Time Spent:
36 min 02 sec
Questions
#
Question
Awarded
Points
1.
Using a _____ we can establish the difference between infinity and
closed in circuit.
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10
2.
- The air-gas ratio required to achieve a perfect combustion of natural
gas is ...
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10
3.
What does this symbol represent?
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10
4.
- What does a pictorial diagram show?
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10
5.
If resistance of a wire increases _____
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6.
Final drawings on a job are called ____
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10
7.
- In Canada and USA, the oncoming power supply to residential homes
is:
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10
8.
How does direct current travel?
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10
9.
- A 120 volt power supply for an electrical appliance in a house is taken
from ___
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10
10.
The theoretical air-gas ratio required to achieve a perfect combustion of
gas propane is ...
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10
11.
An ammeter should be connected ____
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12.
What does this symbol represent?
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13.
A hard sharp small flame indicates:
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14.
A noise lifting blowing pilot flame indicates ...
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15.
- A gas piping line needs to be grounded to ...
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16.
What size conductor is required to bond gas piping systems?
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10
17.
What type of material is used to manufacturing tracer wires?
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10
18.
To measure potential differences we use ____
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19.
What does this symbol represent?
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10
20.
What does this symbol represent?
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21.
- When wire diameter increase _____
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22.
What does this symbol represent?
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23.
What does this symbol represent?
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24.
Voltmeter is connected ...
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25.
The branch fuse size is determinate by:
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26.
Switches are rated:
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27.
The normal fuse for a #14 AWG cooper conductor is ...
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28.
What does this symbol represent?
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10
29.
The limits of flammability for natural gas are ____
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30.
The limits of flammability for propane gas is _____
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31.
- The boiling point for propane is ...
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32.
The boiling point for natural gas is ...
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33.
The chemical formula of methane is _____
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34.
The theoretical stack draft will be greatest when _____
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35.
Natural gas contents 85% to 95% of ____
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36.
The flame temperature of natural gas is approximately _____
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37.
The specific gravity of the natural gas is _____
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38.
The specific gravity of gas propane is _____
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39.
1 psig is equal to _____
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40.
Which of the following statements is correct?
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41.
The main reason for blow a fuse _____
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42.
- According with the code, the time and pressure required for testing a
pipe 202 ft long, working at 2 psig is ____
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43.
What must be done to piping or tubing passing through concrete?
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44.
Joins in steel piping used in gas systems could be:
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45.
What is current measured in?
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46.
The two types of fuse are:
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47.
The chemical formula for propane is ______
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48.
The 24 volts power supply for a residential gas furnace comes from
_____
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49.
Carbon monoxide CO is not combustible.
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10
50.
- What must be the maximum spacing of supports in ft for a pipe that is
1" NPS placed horizontally?
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51.
When the natural gas changes from liquid to gas, the expansion is
_____
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52.
When the propane changes from liquid to gas, the expansion is ...
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53.
The piping or tubing entering a building shall be ____
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54.
When a non-metallic (polyethylene plastic) pipe is used underground,
the copper wire used for tracing purposes shall be a minimum ____
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10
55.
A ____________ is a cylindrical coil that creates a magnetic field inside
when a current rounds through it.
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10
56.
A ___________ generates small DC voltages when its wires are
heated at least 400 °F
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57.
Two copper pipes of 3/5 NPS, one is schedule 40 and the other one is
schedule 80. Both pipes have the same OD outside diameter.
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58.
- Underground piping or tubing shall not pass bellow a foundation or
wall, or under a _____
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59.
Natural gas has a heat value or calorific value of _______
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60.
- Propane has a heat value or calorific value of ....
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61.
Gage pressure is the pressure determinated by most instruments and
gages, usually expressed in pounds per square inch gauge or psig,
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62.
All piping and components that will be concealed shall be inspected
and tested before being concealed.
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63.
- In a one and two family dwelling, the maximum gas pressure in the
piping system, shall not be higher of ________
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64.
- A mixture of air and natural gas will ignite at ____
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65.
BTU stands for ___
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66.
Bonding and grounding are methods used in the gas industry in order
to _____
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67.
Extinguisher used to control fires from wood, paper, clothes, etc., must
be ....
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68.
Extinguisher used to control fires from flammable gases, liquids and
greases, must be ....
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69.
Extinguisher used to control fires from electrical equipment must be
_____
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70.
- To change Fahrenheit to Celsius, which formula is used?
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71.
Atmospheric pressure, at sea level, is 14.7 psia.
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72.
What is combustion air?
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73.
- What is the relief pressure of a propane tank?
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74.
- The products of complete combustion are _____
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75.
- What is needed to start combustion?
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76.
What is the air needed to operate a gas appliance safely?
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77.
The composition of the air is ____
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78.
- What type of air is premixed with gas prior to ignition?
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79.
The products of incomplete combustion are:
0
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80.
Dilution air is:
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81.
Atoms are said to be electrically neutral when they contain the same:
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82.
Which of the following statements is true?
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83.
For a natural gas hose, which is the maximum length for a portable
appliance?
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84.
How many conductors may be wrapped around a screw terminal?
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85.
Conduction is:
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86.
Covection is:
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87.
Radiation is:
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88.
The type (s) of copper tubing that can be used for gas systems is (are)
...
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89.
What is the name for a valve which is normally closed and allows flow
in only one direction?
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90.
Which of the following observations is true:
0
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91.
Which of the following burners is NOT equipped with a mechanical
device for supplying combustion air:
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92.
- Which type of burner is equipped with a constant ignition source and a
flame arrestor and is intended to burn the escaping gas during
0
10
93.
What is the expression for the maximum pressure to which any
component or portion of the fuel system can be subjected?
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10
94.
Which type of draft is produced by a device upstream of the
combustion zone of an appliance?
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95.
What is the term for a device used to control and maintain within
acceptable limits, a uniform outlet pressure?
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96.
What is the term for a device that is installed between the appliance
and the vent termination and provides mechanical draft?
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97.
- At 100 volts, calculate the total current of the circuit.
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98.
If the circuit has 30 amps at the A point, what will be the Voltage
between A and B?
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99.
If a circuit is wired so that electrons can flow in only one possible path,
the circuit is called ...
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100.
What is the minimum clearance needed to service a gas appliance?
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101.
On a gas meter if the 1/4 dial has moved on a pressure test this would
indicate ...
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102.
Underground piping shall be tested for leaks ...
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103.
- Which expression best describes a control intended to prevent an
unsafe condition of temperature, pressure or liquid level:
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104.
Which term is used to describe a stationary device used to divert the
flow of flue gases:
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105.
Mechanical drawings are used to:
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106.
A "bill of materials" is ...
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107.
Which burner supplies combustion air at sufficient pressure to
overcome the resistance of the burner only:
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108.
- The minimum depth a gas line must be buried under a lawn shall be ...
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109.
To correct a symptom such as a fluctuating flame, a Gas Technician
should first ...
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110.
In the absence of a readily accessible burner, an appliance not
equipped with a continuous pilot shall be purged in accordance with:
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