Author Question: Although shielding gases are not toxic, they _____. a. are highly explosive b. can decompose ... (Read 60 times)

lidoalex · **on:** Jul 27, 2018

Although shielding gases are not toxic, they _____.

a. are highly explosive
b. can decompose into toxic gases
c. can displace oxygen when released in a large quantity
d. cause rapid metal corrosion

Question 2

When installing grooved pipe couplings, the coupling housing halves are tightened together until _____.

a. they have a 1/8 gap between them
b. the required bolt torque is reached
c. there is a 1/4 gap between them
d. they touch