Gas - 2Nd Year

Front 1

The basic function of a gas regulator

Back 1

Reduce and maintain a desired set point pressure while compensating for changes in downstream demand

Front 2

The vent from an appliance pressure regulator having a diaphragm larger than ________ inches shall not be restricted

Back 2

6 inches

Hint 2

Average size of the penis.

Front 3

List the main parts of a self operating low pressure gas regulator

Back 3

The loading element (spring), restricting element (orifice, seat), and the measuring elements (diaphragm)

Hint 3

Spring, orifice or seat, and diaphragm

Front 4

Most pressure adjusting screws on regulators are protected from dust and tampering by a/an?

Back 4

Dust cap

Hint 4

A western movie is also known as a duster

Front 5

What is the function of a diaphragm on a gas regulator?

Back 5

To measure the outlet pressure and make corrective adjustments by opening or closing a valve disc at the restricting element.

Front 6

The function on a vent on a regulator is to maintain ________ above a diaphragm and a ________________________

Back 6

Atmospheric pressure, a pathway of least restriction for gases to escape to a safe location.

Front 7

A ruptured diaphragm in a gas regulator will allow the gas to __________________

Back 7

Constantly discharge into the atmosphere

Hint 7

Spew

Front 8

What effect would a ruptured diaphragm have on the outlet pressure of a regulator?

Back 8

It could make the regulator operate sluggishly and create a slight over pressure situation in the downstream system

Front 9

Name the part of the regulator that determines the maximum capacity of gas that can pass through the regulator

Back 9

The orifice (restricting element)

Front 10

A device that can be used to control the movement of air through the vent of a regulator is a/an _____________ device

Back 10

Surge arrestor or a leak limiting device

Front 11

The vent on a regulator is protected from the entry of insects by a/an

Back 11

Screened opening

Front 12

Two devices that may be used to control excessive outlet pressure in a gas regulator are a/an ____________ valve or a/an _______________

Back 12

Internal relief valve, line relief device

Front 13

The direction of flow through a regulator can be determined by finding the ______________ on the body of the regulator.

Back 13

Directional arrow or the word inlet

Front 14

Regulators should be installed so that they are protected from adverse conditions such as

Back 14

Rain, excessive cold, and ice

Front 15

It is recommended that regulators be installed in the _______ plane and that vents and vent limiting devices be installed in the _________ plane

Back 15

Horizontal, vertical

Front 16

The two main considerations when selecting a regulator are

Back 16

Volume of gas required through the regulator and downstream pressure

Front 17

Most domestic locally installed propane systems regulate delivery pressure in _______ stages.

Back 17

Two

Front 18

The outlet pressure of most residential regulators are set by adjusting the

Back 18

Spring (loading element)

Hint 18

There are two

Front 19

List the main considerations when installing regulators

Back 19

Install in the correct flow direction and keep vent opening down.

Front 20

Natural gas appliance regulators for residential applications are usually set at _______ inches water column

Back 20

3.5

Front 21

The first stage of propane regulator is usually located at the_________ while the second stage regulator is usually located at the ___________

Back 21

Propane tank (attached), exterior of the building (attached)

Hint 21

Fresh air

Front 22

Regulators installed inside a building are usually vented to the

Back 22

Outdoors

Hint 22

It's propane.

Front 23

The first stage pressure regulator is recommended to be set at a maximum pressure of _____ psig and the second stage regulator pressure is generally set at ______ inches water column.

Back 23

10 psig, 11 inches water column

Front 24

Explain one of the main problems that can occur with regulators exposed to low temperature or extremely high draws a gas

Back 24

Freeze up low ambient temperatures may cause internal freeze up while high gas draws may cause external freeze up.

Hint 24

They're both the same distance.

Front 25

The minimum distance required between a second stage regulator and moisture exhaust duct from a domestic clothes dryer is ________ and the minimum distance from an air inlet such as an operable window or a combustion air intake is _______

Back 25

3 ft (1 m), 3 ft (1 m)

Front 26

A system regulator excluding a residential to psi G regulator with a leak limiting device shall have a) ___________ b) ___________

Back 26

A manual shut off installed upstream and, an internal or line relief device vented to the outdoors.

Front 27

When venting two or more regulators through a common manifold the manifold Shelby size so that the area is at least _______ the total area of the connected cents and the inlet pressure to all regulators must be within __________

Back 27

Twice, 10% variance if there is an internal relief device

Front 28

What would happen if dirt or a metal cutting chip lodged between the system regulator valve desk and orifice and only the appliance pilot light was operating

Back 28

Regulator would not be able to close and control the outlet pressure. Outlet pressure would rise until the overprotection device (internal/line relief) would activate to protect the downstream components.

Front 29

The two basic functions of a gas orifice are

Back 29

To regulate the volume (cubic feet) and the velocity of gas. The velocity of gas controls the amount of primary air entrained.

Front 30

How does altitude affect the input rating of an appliance?

Back 30

as altitude increases atmospheric pressure decreases. to achieve the proper flame characteristics the amount of fuel the appliance consumes must be reduced (de-rated)

Front 31

Low altitude is considered to be

Back 31

0-2000 feet (0-600 m) above sea level

Front 32

High altitude rating is considered to be

Back 32

2000-4500 ft (600-1350 m) above sea level

Front 33

List the recommended practice for D rating gas appliances installed above high-altitude

Back 33

The appliances D rated an additional 4% per thousand feet or 300 m above the 4500 foot elevation

Front 34

The altitude reading for gas appliances approved for installation in Alberta is

Back 34

High altitude 2000-4500 ft (600-1350 m)

Front 35

The method used to check the firing rate of a gas appliance is

Back 35

Clock the meter. On installations where there is no permanent gas meter you may have to install and clock a temporary approved gas meter

Front 36

What is the formula used to clock a gas meter

Back 36

3600 (seconds per hour) divided by the average time for 3 revolutions = cubic feet of gas per hour. The cubic feet should then be multiplied by the calorific value of the gas to get BTUH

Front 37

The direction in which a gas orifice should be drilled is

Back 37

In the direction of flow

Front 38

The rationale for drilling a gas orifice in the prescribed direction is so that

Back 38

Any burrs that form can quickly and easily be removed with the file

Front 39

The recommended drill size to be used when drilling a gas orifice by hand is

Back 39

Two sizes smaller than the recommended size from the tables

Front 40

When are orifice adapters generally used

Back 40

Orifice adapters are generally used when orifices are no longer available, when the appliance is to be converted from natural gas to propane or when you make an error in drilling

Front 41

What is the information required to size a Gas orifice

Back 41

Type of gas, manifold pressure, appliance input rate, and the number of orifices sharing the load

Front 42

Adjustable Orifices are generally found on

Back 42

Dual fuel appliances such as a gas range