Forth Your Gas Electrical Symbols Diagrams And Formulas

Front 1

What are the, words and symbol, used to describe, amps

Back 1

The symbol is, I,OR A

1) current

2) intensity

3) flow

The letter I ,represents intensity.

Front 2

What are the, words. And symbols, used to describe,

Volts.

Back 2

Electromotive Force. And the symbol,E,

and the word, pressure.

Front 3

Name Ohm's law.

Back 3

R, is the symbol, for resistance, or ohms.

In the Triangle, E represents volts, at the top.

I, is amps, is bottom left ,in the triangle.

R, represents Ohm's ,bottom right in the ,Triangle

I=E÷R.

Front 4

Name Watts law, the baker.

Back 4

P,=IxE.

P equals pressure, the ,P, stands for, Watts or voltamps. P is at the, top of the, triangle.

I, is on the bottom left, of the triangle. I represent amps.

E, is on the bottom right, of the triangle. It represents volts.

How many VA is a Transformer this is where you will see the VA rating sometimes.

Front 5

What is a parallax error.

Back 5

Using a traditional, analog Meter, a shadow can be created , tricking the eye. A mirror

A mirror was then placed, behind the needle,

Once the Shadow and the needle lineup you're looking at it straight.

Front 6

Series / parallel, give the definition.

Back 6

A series / parallel circuit, the series portion of the circuit, controls the parallel circuit.

Front 7

Series and parallel circuits, give the definition.

Back 7

Each portion of the circuit, is independently controlled, and has no effect, on the other part, of the circuit.

Front 8

A series / parallel circuit. how do you ,add up all the, resistances..

Back 8

First you find the answer, for the, parallel side.

1/R,t=1/R¹+1/R²+1/R³

Then you add, the series side of the circuit, to the parallel this gives, you your series / parallel ,resistance answer.

Front 9

How do you ,do the resistance ,for a series and parallel ,circuit.

Back 9

In this circuit, you do the, series portion first. The answer from ,the series portion example.

The answer from ,the series portion example. Two 15 ohm resistors, added together equals 30 . This gets a ,one placed over it,1/30, and put into ,the parallel equation. And now parallel equation is done normally.

Front 10

Name some types ,of operating controls.

Back 10

Thermostat. Pressure controls. And she midity controls.

Front 11

What do actuators do.

Back 11

These devices, regulate flow, from, the response of the controller. Such as water, stream of air, or refrigerant, example, a motor used to move, a valve or a damper. response to the ,signal from the ,operator control.

Front 12

Give an example of primary controls.

Back 12

Gas valve. Relay. Module.

Front 13

What does a thermostatic gas valve do.

Back 13

These are modulating, gas valve referred to as, modusnap. They're usually found in gas-burning appliances like stoves.

The valve snaps on, to minimum flame, and modulates the flame height, in proportion, to the heat demand.

The liquid, in the bulb expands, and travels through, a capillary tube, to the bellows. As the Bellows, expands it turns, and slowly, closes the, gas valve.

Front 14

Diaphragm gas valve name some troubleshooting.

Back 14

If the vent Port is plugged, it will fail to open.

Torn or ruptured diaphragm, it will, failed to open.

If there is low, gas pressure it will fail to open.

If there's not enough, power to operate the ,solenoid valve it will not open.Torn or ruptured diaphragm, it will, failed to open.If there is low, gas pressure it will fail to open.Particles of, foreign matter across, the valve seat. It will fail to close.If the pressure port is plugged, it will fail to close.

Particles of, foreign matter across, the valve seat. It will fail to close.

If the pressure port is plugged, it will fail to close.

Front 15

Safety limit ,switches are wired in series, with primary controls / gas valve. ECO, are manually reset. How are they connected,to the gas valve.

ECO, are manually reset. How are they connected,to the gas valve.

Back 15

They are connected from, the thermocouple, 2 the plastic, retainer ring, and a connector , that slips into the power unit.

Front 16

What is, the max temperature, for a gravity furnace.

What is the max temperature, forced air furnace.

Back 16

350° Fahrenheit or, 175 degrees Celsius, for a gravity furnace.

250 degrees Fahrenheit or, 120 degrees Celsius ,for a forced air.

Front 17

If the pressure port ,is blocked on a diaphragm valve ,what will happen. If the bleed tube, is blocked on the diaphragm valve, what will happen.

Back 17

If the pressure Port, is blocked the gas valve, will not close.

If the bleed tube, is blocked,

The gas valve will not open.

Front 18

Where can the bleed tube, on the diaphragm gas valve, be routed to.

Back 18

With a pressure of, less than .5 PSIG.

With a gas lighter than air.

It can be vented ,into a continuous, pilot burner.

Provided the bleed flame, does not interfere, with the safety control system, slash thermocouple.

With multiple valves, they can be, manifolded together and vented , it to the outdoors.

Front 19

What is the main disadvantage, for solid-state, modules.

Back 19

They cannot withstand, unwanted power surges. And do not, like to be overheated.

Front 20

What is a solid-state rectifier.

Back 20

Changes the current, from AC, to DC, and can be used, to regulate the speed, of a blower motor.

Front 21

What are thermistors.

Back 21

Their masters can be, a positive, or negative, temperature coefficient. Positive coefficient thermistor, will increase resistance with the increase in temperature.

Negative coefficient thermistor, resistance will increase, with a decrease in temperature.

Front 22

RTD. Resistant temperature detector. What is it?

Back 22

These are more commonly, used today, instead of thermistors ,because of their accuracy.

Front 23

How is electromotive force measured?

Back 23

Volts.

Front 24

How is resistance measured?

Back 24

Ohms.

Front 25

How is electrical power measured?

Back 25

Watts.

Front 26

Which material is the best conductor. Thermoplastic, copper, wood ,or silicone.

Back 26

Copper is the better conductor of the four.

Front 27

What material is the best insulator. Thermoplastic. Copper. Wood. Silicone.

Back 27

Thermoplastic is the best of the four.

Front 28

What is this.

Back 28

Heat anticipator, variable resistor

Front 29

What is this.

Back 29

Capacitor, start for a single phase motor.

Front 30

What is this.

Back 30

Interlock, prove a function to activate another function.

Front 31

Relay, normally open, N. O.

Back 31

Relay ,N.O, normally open

Front 32

What will the high limit switch, directly deactivate, when it opens.

Back 32

The Transformer. All the low voltage will shut off. All the 110 voltage stay engaged.

Front 33

What does an ignition, module activate, first when it energizes.

Back 33

Ignition and pilot valve.

Or direct spark ignition or hot surface ignitor.

Front 34

What will a poor ground, on an ignition module cause.

Back 34

No main flame.

Front 35

Manual reset.

Back 35

Manual reset.

Front 36

Adjustable set point.

Back 36

Adjustable set point.

Front 37

Thermostat.

Back 37

Thermostat

Front 38

Fan switch.

Back 38

Fan switch.