Gases are generated from heating fluxes and from certain reactions with air.

• True

• False

Tags

NGSS.MS-PS1-2

Sparks will retain their heat for several seconds, which is often enough time to ignite combustible material.

• True

• False

Tags

NGSS.MS-PS3-5

If compressed gas cylinders are damaged, gas cannot be extracted from the cylinder.

• True

• False

Torches should only be lit with friction lighters.

• True

• False

Acetylene cylinders must be kept in an upright position to prevent acetone (solvent used to dissolve the acetylene) from spewing out with the gas.

• True

• False

Brazed joints, with cup-joint fittings, are used where greater strength is required or where system operating temperatures are as high as 250*F

• True

• False

Tags

NGSS.MS-PS3-3

In actual practice, nearly all soldering is done at temperatures below 600*F and most is done at about 450*F to 500*F.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Both soldered and brazed joints are made by heating a properly prepared joint to the correct temperature and flowing a filler metal by capillary action into a cup-joint fitting.

• True

• False

Tags

NGSS.MS-PS3-3

Brazed joints have limited use for domestic water and cannot be used in steam, hot water heating, refrigeration or medical gas piping systems.

• True

• False

Because of the thinness of its wall, copper tube is not normally threaded.

• True

• False