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Quiz von randy loye, aktualisiert more than 1 year ago
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Erstellt von randy loye
vor etwa 6 Jahre
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Frage 1
Frage
What are two inert gasses
Antworten
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Carbon monoxide and Aldehydes
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CO2 and Hydrogen
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Carbon Monoxide and Nitrogen
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Carbon Dioxide and Nitrogen
Frage 2
Frage
What are two products of incomplete combustion
Antworten
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Carbon dioxide and Nitrogen
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Hydrogen and carbon
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Carbon monoxide and Aldehydes
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Nitrogen and Aldehydes
Frage 3
Frage
In an induced draft burner the fan is
Antworten
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upstream
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downstream
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forced draft burner
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fans are up and down stream
Frage 4
Frage
In a forced draft burner the fan is
Antworten
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downstream
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upstream
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balanced both down and up stream
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in the combustion chamber
Frage 5
Frage
In a balanced draft burner the fan is
Antworten
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downstream
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both up and downstream
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upstream
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is beside the damper
Frage 6
Frage
A bi-metal strip is
Antworten
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two strips of separate metal that have the same temperature when heated causes them to curve and is used to control and open an electrical circuit
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is two strips of metal welded together with different coefficients temperatures when heated causes them to curve and is used to control and open an electrical circuit
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two pieces of metal use for thermostat sensing
Frage 7
Frage
A thermistor is
Antworten
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a thermostat
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a rod and tube device used in water heaters
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a device used to measure room temperature and regulate electrical flow to equipment control's circuit
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used to measure the overheating of an appliance
Frage 8
Frage
A capillary is
Antworten
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a device used to measure flow rate of appliance
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a spring loaded device used operate electrical switches to open or close gas ports. it has a glass bulb at the end that reacts to preasure
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a device that operates like a pressure relief vale for water
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a device heat value in gas appliances through a glass tube at the end of the device
Frage 9
Frage
A rod and tube
Antworten
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is two different metals used in hot water tanks to measure pressure and temperature
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is used as a circuit when the temperate rises it activates an electrical circuit
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is a device used as a gas line in some cases
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is two different metals places inside one another which is used as a thermostat and when heated activates a electrical switch or gas valve port
Frage 10
Frage
A thermocouple
Antworten
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is a device used in conjunction with thermostat to measure heat
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is used in combustion systems to send moisture information and flue gas reading back to main control board
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is used as a safety device as it measures flames in constant pilot and manual reset control devices
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shut the system off if there is no gas to the burner
Frage 11
Frage
An operating aquastat is
Antworten
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a safety device that measure if water levels high or low
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is a device that pumps water when a demand is sent
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is a a device that activates in response to water change. it is a normally open switch that will open when water reaches desired temperature inside the boiler
-
a device that activates in response to water change . it is a normally closed switch that controls temperature of water inside the boiler
Frage 12
Frage
A combination high limit/fan control is used to
Antworten
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control the speed of the fan for saftey
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sense flue gas spillage for safety
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sense air temperature for saftey
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senses flow of flue gas through pressure switch
Frage 13
Frage
The combination high limit/fan control is a
Antworten
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normally closed switch with a bi metal strip
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a normally open fan switch with a rod and tube
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a normally open fan switch with on the left and a normally closed high limit switch on the right
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a normally open high limit switch on the right and a normally closed fan switch on the left
Frage 14
Frage
An operating pressure switch
Antworten
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actuates in the response of high pressure flue gas temperatures
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actuates in responce of high temperature in the furnace
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actuates in response of change of water, steam, air and gas pressure
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actuates in response clogged flue pipe
Frage 15
Frage
Operating pressure witches are used on
Antworten
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AC units and refrigerators
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steam boilers. water boilers and combustion burners for gas burners
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all gas appliances
Frage 16
Frage
An operating pressure switch operates by
Antworten
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releasing steam pressure from the tank as steam rises
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detects steam pressure and turns off gas to main burner
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releasing steam pressure from the tank as water rises
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the switch contacts close and energizes a vent motor to release pressure
Frage 17
Frage
An air flow switch
Antworten
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detects dilution air flow
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ensures air flow such as flu gasses is bring properly vented with differential air flow
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ensures that primary, secondary and excesses air is being sent
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ensures there is no differential air flow
Frage 18
Frage
A flame roll out switch is a high temperature limit switch wired to the burner ignition control. If the flame roll out is sensed the witch is opened and fe-energizes the gas valve.
Antworten
- True
- False
Frage 19
Frage
When furnaces are equipped with draft hoods, they may be equipped with a shut off system that automatically cuts out the main burner when the vent is blocked. These are refereed commonly and incorrectly reffed to as spill switches
Antworten
- True
- False
Frage 20
Frage
What takes place in a heat exchange in a forced air furnace
Antworten
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the flue gasses are stored
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gas and air are mixed
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the combustion process takes place
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return air is heated
Frage 21
Frage
inferred haters may not be used in
Antworten
-
factories
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residential
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warehouses
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loading docks
Frage 22
Frage
Th purpose of a burner in a forced air furnace is to
Antworten
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supply heat directly to the air in the building
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heat the combustion air so that the air is lighter to allow it to flow out the exhaust
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mix the air and gas
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ignite the gas
Frage 23
Frage
Atmospheric burners are design to operate under
Antworten
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high air pressure with low gas pressure
-
normal atmospheric pressure with low gas pressure
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atmospheric pressure with high gas pressure
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compressed air pressure with high gas pressure
Frage 24
Frage
On a roof with a 12/12 pitch and no obstructions the min vent height for a natural gas appliance is
Antworten
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2'
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4'
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10'
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6'
Frage 25
Frage
On a roof with a 10/12 pitch and a wall 4' high and 6 feet away from the vent opening, what is the minimum height fora category one propane appliance
Antworten
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6'
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2'
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3'
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10'
Frage 26
Frage
Witch term is used to described the natural draft of the chimney measurements at or near the base of the chimney
Antworten
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static pressure draft
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neutral pressure point draft
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base pressure draft
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chimney draft
Frage 27
Frage
A damper is a
Antworten
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device used to keep the gasket moist and malleable
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plate or valve for regulating the flow of air or flue gas
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device used to cool and divert flue gasses
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fixed flue gas diverter
Frage 28
Frage
Which of the following is an appliance draft control device
Antworten
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a baffle used to control air to a burner
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a control used to control air for combustion
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a draft hood or draft regulator
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a variable damper in the circulating air supply system
Frage 29
Frage
Which burner supplies combustion air at sufficient pressure to overcome the resistance of the burner only
Antworten
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power burner
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combustion burner
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forced draft burner
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fan assisted burner
Frage 30
Frage
What is the name of the device that is installed either internally or eternally to a venting system to extract heat from flue gasses
Antworten
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draft hood
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heat reclaimer
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draft control device
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heat diverter
Frage 31
Frage
Which burner supplies combustion air with a mechanical device such as a fan or blower at sufficient pressure to overcome resistance of the burner at the appliance
Antworten
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forced draft burner
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high pressure burner
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fan assisted burner
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mechanical draft burner
Frage 32
Frage
Which type of appliance has the combustion products or the flue gasses mixed with the medium being heated
Antworten
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direct fired appliance
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space heater
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immersion appliance
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indirect fired appliance
Frage 33
Frage
Which type of appliance does not have flue gasses mixed with the medium being heated
Antworten
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direct fired appliance
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non vented appliance
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immersion appliance
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indirect fired appliance
Frage 34
Frage
Which appliance is constructed so that all the combustion air is supplied directly from and the products of combustion are vented directly to the outdoors by independent passageways connected directly to the appliance
Antworten
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direct vented appliance
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indoor/outdoor appliances
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indirect fired appliance
-
direct vent appliance
Frage 35
Frage
An A vent is
Antworten
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double wall vent with aluminum inside used for main vertical shaft or vent connector
-
steel of masonry chimney
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double wall with stainless steel inside
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single thickness of galvanized or aluminum
Frage 36
Frage
A B vent is
Antworten
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a steel or masonry chimney
-
a double wall with stainless inside
-
a double wall with aluminum inside
-
double wall with (oval) aluminum inside
Frage 37
Frage
A L vent is a
Antworten
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double wall with stainless inside
-
a single thickness aluminium or galvanized
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steel or masonry
-
venting system under positive pressure
Frage 38
Frage
A BW vent is a
Antworten
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a single galvanized or stainless
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double wall with stainless inside
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double wall (oval) with aluminum inside
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used for venting systems with positive pressure
Frage 39
Frage
A C vent is a
Antworten
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double wall with stainless inside
-
a single thickness galvanized or stainless
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double wall (oval) inside with aluminum inside
-
used for vent with positive pressure
Frage 40
Frage
A BH vent is
Antworten
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single thickness wall of galvanized or stainless
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double wall with stainless inside
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double wall (oval) inside with aluminum inside
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venting system under positive pressure
Frage 41
Frage
For venting BH schedule 40 Thermal plastic PVC/CPVC is used
Antworten
- True
- False
Frage 42
Frage
Three types of thermostats are direct line voltage 120v, 24v and 740ma
Antworten
- True
- False
Frage 43
Frage
Schedule 40 PVC 636 can be used for temperatures up to 60 C/149 F to
Antworten
- True
- False
Frage 44
Frage
CPVC can be used up to and including 90C/194F
Antworten
- True
- False
Frage 45
Frage
The cause of a yellow tipping flame is
Antworten
-
the secondary air is reduced
-
the primary air is reduced
-
to much primary air
-
too much dilution air
Frage 46
Frage
The bunsen flame or blue flame is is the result of
Antworten
-
no premixing of air
-
perfect secondary air
-
some premixing of primary air
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no excess air
Frage 47
Frage
Three types of orifices are Fixed, adjustable and universal
Antworten
- True
- False
Frage 48
Frage
Min and max orifice sizes are
Antworten
-
28-32 drill
-
29-36 drill
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29-42 drill
-
29-40 drill
Frage 49
Frage
Using ohms law what reading would be giving if each end of the switch was measures
Antworten
-
Reading would be 0 or OL
-
reading would be measurable
Frage 50
Frage
Using ohms what reading would be shown on the meter if measurement was taken before and after a load
Antworten
-
Infinity (00)
-
measurable
Frage 51
Frage
Most common used wire is romex 14/2
Antworten
- True
- False
Frage 52
Frage
What does NMD stand for
Antworten
-
Non metal dirt resistant
-
Non metal dry
-
Non more drop
-
Non move drip
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