weld 21 test 1,2,7

57問 • 1年前

ユーザ名非公開

通報

問題一覧

A charcoal filter in an air-purifying respirator should be changed____

when the wearer detects any taste or smell

A document issued by the site manager that allows a welder to perform operations with a potential risk of fire is a___

hot work permit

All of the following fabrics may be worn around sources of sparks or high heat except

polyester

An exhaust hood should be located of welding fumes.

four to six inches away from

An oxygen level of percent by volume is considered normal and safe to work in.

19.5 to 21.5

Compared to a full leather welding jacket, a welding cape is

cooler

Detailed information regarding the possible hazards associated with a product is contained in a

material safety data sheet (MSDS)

Foot and vehicle traffic in the workplace is

more hazardous at starting and quitting times

If acetylene is withdrawn from a cylinder at a rate of more than one-seventh of the volume per hour, there is a risk of ----•

liquid acetone being drawn into the hoses and gumming up the check valves and regulator

In addition to protecting other workers from exposure to electric arcs, welding screens

prevent drafts from interfering with the stability of the arc

Most welding environment fires occur during

oxyfuel gas welding or cutting

The first thing to be done at any job site before work begins is to

conduct an evaluation of the hazards that exist

The most common welding accident is ..

burns to the hands and arms

The outcome of an electric shock is determined by the

amount of current that passes through the body

The proper selection of a respirator is based on the

contaminant present and its concentration

The risk of flash burn can be reduced by wearing

safety glasses with a properly tinted lens

The storage area for oxygen cylinders must be 20 feet away from fuel gas cylinders or be

separated by a wall five feet high with a half-hour burn rating

When lifting a heavy object,

distribute the weight of the object evenly between both hands

Which of the following is a correct statement regarding personal protective equipment?

Disposable earplugs are the most common form of hearing protection used in welding.

A cutting flame that has an excess of oxygen is called a(n) flame.

oxidizing

An oxyfuel cutting torch should be checked for leaks

each time it is used

As a reminder that the regulator on a cylinder has left-handed threads, a V-notch is sometimes cut around the

nut

A track burner is a device used to

cut or bevel a straight line

Before cutting or welding containers, purge them with a flow of

inert gas

Combining pure oxygen with a burning material causes a fire to

burn more slowly

For long-term cutting of materials containing cadmium or mercury, always wear an approved

supplied-air respirator

If a high volume of gas is removed from a liquefied fuel gas cylinder, the pressure

drops and the temperature of the cylinder also drops

Methylacetylene propadiene (MAPPÂ®) gas is a combination of acetylene and

propane

On a combination cutting torch, the primary fuel gas and oxygen valves are located on the

torch handle

Oxygen cylinders must be tested

every three years

Safety fuse plugs in the top and bottom of an acetylene cylinder are designed to

release acetylene gas in the event of a fire

The fuel gas regulator's high-pressure gauge usually reads up to -. psi.

400

The hoses used to carry oxygen from the cylinder to the torch are usually

green

The process of cutting a groove into a surface is known as

gouging

The regulators used on oxygen cylinders are often painted green and always have on all connections.

right-hand threads

The selection of a cutting torch tip depends on the thickness of the base metal being cut and the being used.

kind of fuel gas

The special cutting tip for cutting off bolt heads and nuts is called a tip.

rivet cutting

When acetylene gas is combined with oxygen during oxyfuel cutting activities, the acetylene causes the flame to burn

hotter than 5,500Â°F

When a cutting job is completed and the oxyfuel equipment is no longer needed, the first step in shutting down the oxyfuel cutting equipment is to

close the fuel gas cylinder valve

When an empty cylinder has been removed from the workstation and stored, it must be marked MT (or the acceptable site notation for indicating an empty cylinder)

near its top.

When cutting thin steel with oxyfuel cutting equipment, hold the torch so that the tip is pointing in the direction the torch is traveling at a degree angle.

15Â° to 20Ã°

When used in oxyfuel cutting, propylene mixtures burn at temperatures around

5,193Â°F

When welding, wear high-top safety boots at least tall.

8”

A voltage step-down transformer converts....

high-voltage, low-amperage current to low-voltage, high-amperage current

Engine generators should be shut down if no welding is to take place for more than minutes.

Hand tools for preparing a welding surface and cleaning a completed weld include

files, wire brushes, and chipping hammers

If the tip of a SMAW electrode is touched and held against the workpiece instead of allowing for a gap between the two, the electrode will

pass the electricity directly to the workpiece without creating an arc

In a transformer-rectifier type welding system, AC voltage is reduced to a lower voltage level, and then converted (rectified) into ___

DC voltage

SMAW power supplies are designed to produce an output that has a current.

nearly constant

The conductors in welding cables are made of strands of wire.

copper

The longer the distance the welding current must travel, the

larger the welding cable must be to reduce voltage drop

The preventive maintenance schedule for an engine-driven welding machine is usually based on

the number of hours that the engine operates

The primary current for a welding machine can be 120V or 240V single-phase or _. three-phase.

480v

The size of an arc welding machine is determined by its rated amperage and

duty cycle

The standard frequency of alternating current (AC) in the United States is set at cycles per second.

Weld slag chippers and needle scalers are tools.

pneumatically powered

When stringing welding cable overhead or between floors, use to tie off the cables.

rope

weld 20 mod 5-8-10 weld 24 midterm

ユーザ名非公開 · 41問 · 1年前

weld 20 mod 5-8-10 weld 24 midterm

weld 20 test 6-11-12

weld 20 test 6-11-12

weld 21 test 1,2,7 / wld 24 midterm

ユーザ名非公開 · 57問 · 11ヶ月前

weld 21 test 1,2,7 / wld 24 midterm

57問 • 11ヶ月前

ユーザ名非公開

問題一覧

A charcoal filter in an air-purifying respirator should be changed____

when the wearer detects any taste or smell

A document issued by the site manager that allows a welder to perform operations with a potential risk of fire is a___

hot work permit

All of the following fabrics may be worn around sources of sparks or high heat except

polyester

An exhaust hood should be located of welding fumes.

four to six inches away from

An oxygen level of percent by volume is considered normal and safe to work in.

19.5 to 21.5

Compared to a full leather welding jacket, a welding cape is

cooler

Detailed information regarding the possible hazards associated with a product is contained in a

material safety data sheet (MSDS)

Foot and vehicle traffic in the workplace is

more hazardous at starting and quitting times

If acetylene is withdrawn from a cylinder at a rate of more than one-seventh of the volume per hour, there is a risk of ----•

liquid acetone being drawn into the hoses and gumming up the check valves and regulator

In addition to protecting other workers from exposure to electric arcs, welding screens

prevent drafts from interfering with the stability of the arc

Most welding environment fires occur during

oxyfuel gas welding or cutting

The first thing to be done at any job site before work begins is to

conduct an evaluation of the hazards that exist

The most common welding accident is ..

burns to the hands and arms

The outcome of an electric shock is determined by the

amount of current that passes through the body

The proper selection of a respirator is based on the

contaminant present and its concentration

The risk of flash burn can be reduced by wearing

safety glasses with a properly tinted lens

The storage area for oxygen cylinders must be 20 feet away from fuel gas cylinders or be

separated by a wall five feet high with a half-hour burn rating

When lifting a heavy object,

distribute the weight of the object evenly between both hands

Which of the following is a correct statement regarding personal protective equipment?

Disposable earplugs are the most common form of hearing protection used in welding.

A cutting flame that has an excess of oxygen is called a(n) flame.

oxidizing

An oxyfuel cutting torch should be checked for leaks

each time it is used

As a reminder that the regulator on a cylinder has left-handed threads, a V-notch is sometimes cut around the

nut

A track burner is a device used to

cut or bevel a straight line

Before cutting or welding containers, purge them with a flow of

inert gas

Combining pure oxygen with a burning material causes a fire to

burn more slowly

For long-term cutting of materials containing cadmium or mercury, always wear an approved

supplied-air respirator

If a high volume of gas is removed from a liquefied fuel gas cylinder, the pressure

drops and the temperature of the cylinder also drops

Methylacetylene propadiene (MAPPÂ®) gas is a combination of acetylene and

propane

On a combination cutting torch, the primary fuel gas and oxygen valves are located on the

torch handle

Oxygen cylinders must be tested

every three years

Safety fuse plugs in the top and bottom of an acetylene cylinder are designed to

release acetylene gas in the event of a fire

The fuel gas regulator's high-pressure gauge usually reads up to -. psi.

400

The hoses used to carry oxygen from the cylinder to the torch are usually

green

The process of cutting a groove into a surface is known as

gouging

The regulators used on oxygen cylinders are often painted green and always have on all connections.

right-hand threads

The selection of a cutting torch tip depends on the thickness of the base metal being cut and the being used.

kind of fuel gas

The special cutting tip for cutting off bolt heads and nuts is called a tip.

rivet cutting

When acetylene gas is combined with oxygen during oxyfuel cutting activities, the acetylene causes the flame to burn

hotter than 5,500Â°F

When a cutting job is completed and the oxyfuel equipment is no longer needed, the first step in shutting down the oxyfuel cutting equipment is to

close the fuel gas cylinder valve

When an empty cylinder has been removed from the workstation and stored, it must be marked MT (or the acceptable site notation for indicating an empty cylinder)

near its top.

When cutting thin steel with oxyfuel cutting equipment, hold the torch so that the tip is pointing in the direction the torch is traveling at a degree angle.

15Â° to 20Ã°

When used in oxyfuel cutting, propylene mixtures burn at temperatures around

5,193Â°F

When welding, wear high-top safety boots at least tall.

8”

A voltage step-down transformer converts....

high-voltage, low-amperage current to low-voltage, high-amperage current

Engine generators should be shut down if no welding is to take place for more than minutes.

Hand tools for preparing a welding surface and cleaning a completed weld include

files, wire brushes, and chipping hammers

If the tip of a SMAW electrode is touched and held against the workpiece instead of allowing for a gap between the two, the electrode will

pass the electricity directly to the workpiece without creating an arc

In a transformer-rectifier type welding system, AC voltage is reduced to a lower voltage level, and then converted (rectified) into ___

DC voltage

SMAW power supplies are designed to produce an output that has a current.

nearly constant

The conductors in welding cables are made of strands of wire.

copper

The longer the distance the welding current must travel, the

larger the welding cable must be to reduce voltage drop

The preventive maintenance schedule for an engine-driven welding machine is usually based on

the number of hours that the engine operates

The primary current for a welding machine can be 120V or 240V single-phase or _. three-phase.

480v

The size of an arc welding machine is determined by its rated amperage and

duty cycle

The standard frequency of alternating current (AC) in the United States is set at cycles per second.

Weld slag chippers and needle scalers are tools.

pneumatically powered

When stringing welding cable overhead or between floors, use to tie off the cables.

rope