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Sometimes distortion takes place when devices such as clamps are removed. This is caused by residual stess. 

A Hi-Lo gauge can be used to check: 

Passing a qualification test with a V-groove weld with metal backing in the 3G and 4G position qualifies the welder to make: 

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.