14030211
Descrição
Quiz por randy loye, atualizado more than 1 year ago
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Criado por randy loye
aproximadamente 6 anos atrás
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Questão 1
Questão
What are two inert gasses
Responda
-
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
Questão 2
Questão
What are two products of incomplete combustion
Responda
-
Carbon dioxide and Nitrogen
-
Hydrogen and carbon
-
Carbon monoxide and Aldehydes
-
Nitrogen and Aldehydes
Questão 3
Questão
In an induced draft burner the fan is
Responda
-
upstream
-
downstream
-
forced draft burner
-
fans are up and down stream
Questão 4
Questão
In a forced draft burner the fan is
Responda
-
downstream
-
upstream
-
balanced both down and up stream
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in the combustion chamber
Questão 5
Questão
In a balanced draft burner the fan is
Responda
-
downstream
-
both up and downstream
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upstream
-
is beside the damper
Questão 6
Questão
A bi-metal strip is
Responda
-
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
-
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
Questão 7
Questão
A thermistor is
Responda
-
a thermostat
-
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
-
used to measure the overheating of an appliance
Questão 8
Questão
A capillary is
Responda
-
a device used to measure flow rate of appliance
-
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
-
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
Questão 9
Questão
A rod and tube
Responda
-
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
Questão 10
Questão
A thermocouple
Responda
-
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
Questão 11
Questão
An operating aquastat is
Responda
-
a safety device that measure if water levels high or low
-
is a device that pumps water when a demand is sent
-
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
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a device that activates in response to water change . it is a normally closed switch that controls temperature of water inside the boiler
Questão 12
Questão
A combination high limit/fan control is used to
Responda
-
control the speed of the fan for saftey
-
sense flue gas spillage for safety
-
sense air temperature for saftey
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senses flow of flue gas through pressure switch
Questão 13
Questão
The combination high limit/fan control is a
Responda
-
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
-
a normally open high limit switch on the right and a normally closed fan switch on the left
Questão 14
Questão
An operating pressure switch
Responda
-
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
Questão 15
Questão
Operating pressure witches are used on
Responda
-
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
Questão 16
Questão
An operating pressure switch operates by
Responda
-
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
Questão 17
Questão
An air flow switch
Responda
-
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
Questão 18
Questão
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.
Responda
- True
- False
Questão 19
Questão
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
Responda
- True
- False
Questão 20
Questão
What takes place in a heat exchange in a forced air furnace
Responda
-
the flue gasses are stored
-
gas and air are mixed
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the combustion process takes place
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return air is heated
Questão 21
Questão
inferred haters may not be used in
Responda
-
factories
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residential
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warehouses
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loading docks
Questão 22
Questão
Th purpose of a burner in a forced air furnace is to
Responda
-
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
Questão 23
Questão
Atmospheric burners are design to operate under
Responda
-
high air pressure with low gas pressure
-
normal atmospheric pressure with low gas pressure
-
atmospheric pressure with high gas pressure
-
compressed air pressure with high gas pressure
Questão 24
Questão
On a roof with a 12/12 pitch and no obstructions the min vent height for a natural gas appliance is
Responda
-
2'
-
4'
-
10'
-
6'
Questão 25
Questão
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
Responda
-
6'
-
2'
-
3'
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10'
Questão 26
Questão
Witch term is used to described the natural draft of the chimney measurements at or near the base of the chimney
Responda
-
static pressure draft
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neutral pressure point draft
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base pressure draft
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chimney draft
Questão 27
Questão
A damper is a
Responda
-
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
Questão 28
Questão
Which of the following is an appliance draft control device
Responda
-
a baffle used to control air to a burner
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a control used to control air for combustion
-
a draft hood or draft regulator
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a variable damper in the circulating air supply system
Questão 29
Questão
Which burner supplies combustion air at sufficient pressure to overcome the resistance of the burner only
Responda
-
power burner
-
combustion burner
-
forced draft burner
-
fan assisted burner
Questão 30
Questão
What is the name of the device that is installed either internally or eternally to a venting system to extract heat from flue gasses
Responda
-
draft hood
-
heat reclaimer
-
draft control device
-
heat diverter
Questão 31
Questão
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
Responda
-
forced draft burner
-
high pressure burner
-
fan assisted burner
-
mechanical draft burner
Questão 32
Questão
Which type of appliance has the combustion products or the flue gasses mixed with the medium being heated
Responda
-
direct fired appliance
-
space heater
-
immersion appliance
-
indirect fired appliance
Questão 33
Questão
Which type of appliance does not have flue gasses mixed with the medium being heated
Responda
-
direct fired appliance
-
non vented appliance
-
immersion appliance
-
indirect fired appliance
Questão 34
Questão
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
Responda
-
direct vented appliance
-
indoor/outdoor appliances
-
indirect fired appliance
-
direct vent appliance
Questão 35
Questão
An A vent is
Responda
-
double wall vent with aluminum inside used for main vertical shaft or vent connector
-
steel of masonry chimney
-
double wall with stainless steel inside
-
single thickness of galvanized or aluminum
Questão 36
Questão
A B vent is
Responda
-
a steel or masonry chimney
-
a double wall with stainless inside
-
a double wall with aluminum inside
-
double wall with (oval) aluminum inside
Questão 37
Questão
A L vent is a
Responda
-
double wall with stainless inside
-
a single thickness aluminium or galvanized
-
steel or masonry
-
venting system under positive pressure
Questão 38
Questão
A BW vent is a
Responda
-
a single galvanized or stainless
-
double wall with stainless inside
-
double wall (oval) with aluminum inside
-
used for venting systems with positive pressure
Questão 39
Questão
A C vent is a
Responda
-
double wall with stainless inside
-
a single thickness galvanized or stainless
-
double wall (oval) inside with aluminum inside
-
used for vent with positive pressure
Questão 40
Questão
A BH vent is
Responda
-
single thickness wall of galvanized or stainless
-
double wall with stainless inside
-
double wall (oval) inside with aluminum inside
-
venting system under positive pressure
Questão 41
Questão
For venting BH schedule 40 Thermal plastic PVC/CPVC is used
Responda
- True
- False
Questão 42
Questão
Three types of thermostats are direct line voltage 120v, 24v and 740ma
Responda
- True
- False
Questão 43
Questão
Schedule 40 PVC 636 can be used for temperatures up to 60 C/149 F to
Responda
- True
- False
Questão 44
Questão
CPVC can be used up to and including 90C/194F
Responda
- True
- False
Questão 45
Questão
The cause of a yellow tipping flame is
Responda
-
the secondary air is reduced
-
the primary air is reduced
-
to much primary air
-
too much dilution air
Questão 46
Questão
The bunsen flame or blue flame is is the result of
Responda
-
no premixing of air
-
perfect secondary air
-
some premixing of primary air
-
no excess air
Questão 47
Questão
Three types of orifices are Fixed, adjustable and universal
Responda
- True
- False
Questão 48
Questão
Min and max orifice sizes are
Responda
-
28-32 drill
-
29-36 drill
-
29-42 drill
-
29-40 drill
Questão 49
Questão
Using ohms law what reading would be giving if each end of the switch was measures
Responda
-
Reading would be 0 or OL
-
reading would be measurable
Questão 50
Questão
Using ohms what reading would be shown on the meter if measurement was taken before and after a load
Responda
-
Infinity (00)
-
measurable
Questão 51
Questão
Most common used wire is romex 14/2
Responda
- True
- False
Questão 52
Questão
What does NMD stand for
Responda
-
Non metal dirt resistant
-
Non metal dry
-
Non more drop
-
Non move drip
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