Gas - XMiscellaneous

Question 1

What is the estimated size of a proton?

Answer 1

0.07 trillionth of an inch in diameter.

Question 2

The number of ______ that each atom has in it’s nucleus determines it’s atomic number.

Answer 2

Protons.

Question 3

Atoms resist releasing their electrons because a phenomenon known as _____________.

Answer 3

Chemical stability.

Question 4

All that is really required to produce electromagnetism is ___________ between conductor and a magnetic field.

Answer 4

Relative motion.

Question 5

The effect of pressure in causing electrical charges is the definition of?

Answer 5

Piezoelectricity.

Question 6

An electric charge which results when two pieces of material (such as a rubber rod and a piece of fur) are rubbed together and electrons from one material are passed to the other is the definition of?

Answer 6

Static electricity.

Question 7

Electricity produced from friction is called the ________ effect.

Answer 7

Triboelectric.

Question 8

When a light beam strikes certain materials (including potassium and sodium), the energy from the photons causes the atoms to release electrons is the definition of?

Answer 8

Photoelectricity or the photoelectric effect.

Question 9

All atoms share the valence electrons and become bound together is the definition of:

Answer 9

Metallic bonding.

Question 10

Neon light is an example of?

Television tube is an example of?

Fluorescent light bulb is an example of?

Answer 10

Electroluminescence.

Phosphorescence[][][]]

Fluorescence[][][][][][][]]

Question 11

Magnets which retain their ability to attract other magnetic materials and do not require electricity to function are called?

Answer 11

Permanent magnets.

Question 12

___________ is a name given to any material that acts like iron in a magnetic field.

Answer 12

Ferromagnetic.

Question 13

These lines of force, called ____ lines exist around any conductor that is carrying current and are concentrated around poles of the magnet.

Answer 13

Flux.

Question 14

The ease with which a material accepts magnetic lines of force is called it’s __________.

Answer 14

Permeability.

Question 15

Negative is considered to be low pressure or __________.

Answer 15

Low potential.

Question 16

Positive is considered to be high pressure or __________.

Answer 16

High potential.

Question 17

The ease with which metal allows current to flow is called __________.

Answer 17

Conductance.

Question 18

The opposition a material offers to the flow of electrical charges is called ________.

Answer 18

Resistance.

Question 19

____ is used to describe the amount of power delivered from the source.

Answer 19

Load.

Question 20

A ____ is defined as the electrical force required to produce 1 ampere of current in 1 ohm of resistance.

Answer 20

Volt.

Question 21

One ______ of electrical current is defined as the movement of 1 coulomb of electrons that pass a given point of measurement in one second.

Answer 21

Ampere.

Question 22

The ___ is defined as the resistance a material offers to 1 ampere when 1 volt of electrical potential is present across the material.

Answer 22

Ohm.

Question 23

The current is equal to the voltage divided by the resistance is the definition of?

Answer 23

Ohm’s law.

Question 24

The type of one-path electrical circuit where exactly the same amount of current flows through ever part of the circuit is known as?

Answer 24

A series circuit.

Question 25

The type of multiple-path electrical circuit where there are one or more points where the current divides and follows different paths is known as?

Answer 25

A parallel circuit.

Question 26

What should the tempurature difference between the hot and cold junction of a thermocouple be?

Answer 26

At least 400°F (204°C).

Question 27

The ends of the ____ junction become the leads to the safety shut-off valve or switch.

Answer 27

Cold.

Question 28

Commonly, thermocouples are ______ long, but models are made as long as __ in”.

Answer 28

18, 24 and 36 inches / 60 inches.

Question 29

Most modern thermopiles have ____ thermocouples connected in series.

Answer 29

10 to 30.

Question 30

A safety shut-off can only be used where there is a ____________________________________________.

Answer 30

Constant pilot supervised by a thermocouple or thermopile.

Question 31

Aquastats with fixed differentials have a _____ tempurature differential. Those with adjustable differential can be adjusted between __ and __.

Answer 31

2-°5°F (1-3°C) 5°F and 30°F (3-17°C).

Question 32

What are the three basic types of operating aquastats?

Answer 32

Remote bulb.

Surface mounted.

Direct mounted with horizontal probe.

Question 33

What are the two types of circuit breakers?

Answer 33

Magnetic and Thermal.

Question 34

The _____ is powered by the control module and is capable of producing an electric spark.

Answer 34

Igniter.

Question 35

The _________ is connected to the control module and detects the prescence or absence of a flame.

Answer 35

Flame sensor.

Question 36

The typical flame rod is usually made from ______ or _____.

Answer 36

Globar or Kanthol.

Question 37

The _______ measures the current flowing through the circuit.

Answer 37

Ammeter.

Question 38

________ are used to measure a difference in potential between two points.

Answer 38

Voltmeters.

Question 39

_________ measure resistance.

Answer 39

Ohmmeters.

Question 40

A ___________ has an open circuit output of ___ and can only be used to power a pilotstat device in a combustion safety circuit.

Answer 40

Thermocouple / 30 mV.