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Chain clamps are used to fit up straight pipe and can not be used to fit up elbows, flanges and Ts. 

When welding socket joints, the end of the pipe should fit tightly against the bottom of the socket. 

Which of the following is true about clamping small-diameter pipes? 

The best way to attach a strongback to the weldment is to: 

The most common way to hold a joint in place after fitting it up is to use tack welds. 

Which of the following tools has a glass tube that must be protected from heat and weld spatter? 

In SMAW, qualifying with an F4 electrode will qualify the welder to weld with F1, F2, F3 and F4 electrodes. 

Joint design and setup are usually governed by written codes and specifications that must be followed. 

If a welder fails a qualification test, he or she may immediately restest by taking ______ test weld(s) of the type that was failed. 

When working with arrays, most programming languages perform ________ to ensure that programs don’t use invalid subscripts.