Question 1

What are the factors that affect the accuracy of fuel-gas flame temperature and heat readings?

Accepted Answer

The data available for fuel-gas flame characteristics are not gathered in a consistent manner. Temperature and heat, for example, are very basic physical facts about the flame of a specific gas. But even these facts can be misleading. The flame condition, such as neutral, oxidizing, or carbonizing (carburizing), and/or the purity of the gases being used will affect the temperature of the flame. The method by which the temperature is measured also affects its value. The highest potential temperature values are determined by chemical analysis and by the calculation of the theoretical energy released. However, no combustion is perfect, so this temperature is never attained. An infrared analysis or optical pyrometer of the flame gives the highest temperature in the flame. But this temperature is concentrated in a thin layer around the inner cone and is so small that it is not of practical use. The optical pyrometer and the infrared analysis both give an accurate temperature reading, but where the temperature is measured makes a difference.

Question 2

If the pressure setting is too high, ____.

Accepted Answer

A)   the cutting stream may gouge the side of the cut
B)   the top edge may be melted or rounded off
C)   the cut may be incomplete
D)   the sides of the kerf may be dished

Question 3

The ____ gauge is used to indicate the amount of gas that remains in a cylinder.

Accepted Answer

A)   working
B)   cylinder
C)   Bourdon
D)   high-pressure

Question 4

The space produced during the cutting process is the ____.

Accepted Answer

A)   coupling distance
B)   cut gap
C)   kerf
D)   drag

Question 5

____ cylinders have connections so that either liquid or vapor can be drawn out of the cylinder.

Accepted Answer

A)   Acetylene
B)   Cryogenic
C)   Oxygen
D)   Liquid petroleum gas

Question 6

What are the piping requirements for manifolds?

Accepted Answer

Piping for the high-pressure side of a m...

Question 7

The torch pressure is always ____ the working pressure shown on the gauge.

Accepted Answer

A)   less than
B)   the same as
C)   greater than
D)   much greater than A

Question 8

The higher the combustion rate of an oxygen fuel mixture, the more prone the mixture is to ____.

Accepted Answer

A)   burnthrough
B)   flashback
C)   ignition
D)   secondary combustion

Question 9

In a two-stage regulator, the first spring ____.

Accepted Answer

A)   is adjusted like other regulators
B)   can be larger, allowing a greater flow
C)   is preset at the factory to reduce pressure to 225 psig
D)   has to control a maximum pressure of only around 225 psig C

Question 10

The size of a hose is the ____ of the hose.

Accepted Answer

A)   inside circumference
B)   outside circumference
C)   inside diameter
D)   outside diameter

Question 11

Hydrocarbons are made up of ____.

Accepted Answer

A)   hydrogen and carbon
B)   oxygen and hydrogen
C)   oxygen and carbon
D)   oxygen, hydrogen, and carbon

Question 12

Inside a regulator gauge is the C -shaped ____.

Accepted Answer

A)   safety disc
B)   Bourdon tube
C)   safety cylinder
D)   diaphragm

Question 13

Which organization has a standard numbering system for sizing cutting tips?

Accepted Answer

A)   American Welding Society
B)   OSHA
C)   National Bureau of Standards
D)   There is no standard

Question 14

If ____________________ is used in tips designed for other fuel gases, the tip may overheat.

Accepted Answer

The answer of If ____________________ is used in tips designed...

Question 15

Often called ____________________, machine cutters have a motorized carrier with adjustable speed control that holds a machine-cutting torch and travels along a track.

Accepted Answer

The answer of Often called ____________________, machine cutters have a...

Question 16

The ____ determines the thickness of the metal that can be cut.

Accepted Answer

A)   arc length
B)   current
C)   cutting tip diameter
D)   fuel gas

Question 17

A machine cutting torch is sometimes referred to as a(n)  ____.

Accepted Answer

A)   portable cutting torch
B)   line burner
C)   hand torch
D)   combination torch

Question 18

Gauges that do not read ____ when the pressure is released must be repaired or replaced.

Accepted Answer

A)   0 psig
B)   14 psig
C)   45 psig
D)   100 psig

Question 19

When cutting ____________________ diameter pipe, the torch tip is always pointed toward the center of the pipe.

Accepted Answer

The answer of When cutting ____________________ diameter pipe, the torch...

Question 20

How do you test a diaphragm for leaks?

Accepted Answer

A diaphragm can be tested for leaks by f...

Exam 7: Flame Cutting Equipment, Setup, and Operation

What are the factors that affect the accuracy of fuel-gas flame temperature and heat readings?

If the pressure setting is too high, ____.

Correct Answer
verified

The ____ gauge is used to indicate the amount of gas that remains in a cylinder.

Correct Answer
verified

The space produced during the cutting process is the ____.

Correct Answer
verified

____ cylinders have connections so that either liquid or vapor can be drawn out of the cylinder.

Correct Answer
verified

What are the piping requirements for manifolds?

Correct Answer
verified
Piping for the high-pressure side of a m...
View Answer

The torch pressure is always ____ the working pressure shown on the gauge.

Correct Answer
verified
A

The higher the combustion rate of an oxygen fuel mixture, the more prone the mixture is to ____.

Correct Answer
verified

In a two-stage regulator, the first spring ____.

Correct Answer
verified
C

The size of a hose is the ____ of the hose.

Correct Answer
verified

Hydrocarbons are made up of ____.

Correct Answer
verified

Inside a regulator gauge is the C -shaped ____.

Correct Answer
verified

Which organization has a standard numbering system for sizing cutting tips?

Correct Answer
verified

If ____________________ is used in tips designed for other fuel gases, the tip may overheat.

Correct Answer
verified

Often called ____________________, machine cutters have a motorized carrier with adjustable speed control that holds a machine-cutting torch and travels along a track.

Correct Answer
verified

The ____ determines the thickness of the metal that can be cut.

Correct Answer
verified

A machine cutting torch is sometimes referred to as a(n) ____.

Correct Answer
verified

Gauges that do not read ____ when the pressure is released must be repaired or replaced.

Correct Answer
verified

When cutting ____________________ diameter pipe, the torch tip is always pointed toward the center of the pipe.

Correct Answer
verified

How do you test a diaphragm for leaks?

Correct Answer
verified
A diaphragm can be tested for leaks by f...
View Answer

Exam 7: Flame Cutting Equipment, Setup, and Operation

What are the factors that affect the accuracy of fuel-gas flame temperature and heat readings?

If the pressure setting is too high, ____.

Correct AnswerverifiedShow Answer

The ____ gauge is used to indicate the amount of gas that remains in a cylinder.

Correct AnswerverifiedShow Answer

The space produced during the cutting process is the ____.

Correct AnswerverifiedShow Answer

____ cylinders have connections so that either liquid or vapor can be drawn out of the cylinder.

Correct AnswerverifiedShow Answer

What are the piping requirements for manifolds?

Correct AnswerverifiedPiping for the high-pressure side of a m...View AnswerShow Answer

The torch pressure is always ____ the working pressure shown on the gauge.

Correct AnswerverifiedA

The higher the combustion rate of an oxygen fuel mixture, the more prone the mixture is to ____.

Correct AnswerverifiedShow Answer

In a two-stage regulator, the first spring ____.

Correct AnswerverifiedC

The size of a hose is the ____ of the hose.

Correct AnswerverifiedShow Answer

Hydrocarbons are made up of ____.

Correct AnswerverifiedShow Answer

Inside a regulator gauge is the C -shaped ____.

Correct AnswerverifiedShow Answer

Which organization has a standard numbering system for sizing cutting tips?

Correct AnswerverifiedShow Answer

If ____________________ is used in tips designed for other fuel gases, the tip may overheat.

Correct AnswerverifiedShow Answer

Often called ____________________, machine cutters have a motorized carrier with adjustable speed control that holds a machine-cutting torch and travels along a track.

Correct AnswerverifiedShow Answer

The ____ determines the thickness of the metal that can be cut.

Correct AnswerverifiedShow Answer

A machine cutting torch is sometimes referred to as a(n) ____.

Correct AnswerverifiedShow Answer

Gauges that do not read ____ when the pressure is released must be repaired or replaced.

Correct AnswerverifiedShow Answer

When cutting ____________________ diameter pipe, the torch tip is always pointed toward the center of the pipe.

Correct AnswerverifiedShow Answer

How do you test a diaphragm for leaks?

Correct AnswerverifiedA diaphragm can be tested for leaks by f...View AnswerShow Answer

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Piping for the high-pressure side of a m...
View Answer

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A

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C

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A diaphragm can be tested for leaks by f...
View Answer