Chapter 19

Question 1

Acetylene

Answer 1

a colorless gas (a compound of carbon and hydrogen).

has a pungent smell due largely to impurities.

is flammable and highly explosive when mixed with oxygen.

is explosive when compressed above 15 psi, but is very soluble in acetone.

forms explosive compounds with silver and copper, so never use copper pipe or fittings with it.

Question 2

check valves

Answer 2

allow the gases to flow in only one direction to prevent backflow.

are necessary safety devices attached between the hoses and the regulator outlets.

Question 3

gas hoses

Answer 3

transport low-pressure gas from the regulator to the torch.

Question 4

striker

Answer 4

Hand-held piece of equipment used to produce spark.

Question 4

regulators

Answer 4

reduce the high cylinder pressures to low, hose pressures suitable for welding and cutting applications.

Question 5

torch (blowpipe)

Answer 5

controls the mixture of oxygen and acetylene to produce the desired flame.

Question 6

a colorless gas (a compound of carbon and hydrogen).

has a pungent smell due largely to impurities.

is flammable and highly explosive when mixed with oxygen.

is explosive when compressed above 15 psi, but is very soluble in acetone.

forms explosive compounds with silver and copper, so never use copper pipe or fittings with it.

Answer 6

Acetylene