Ques 1. Resistance welding is a welding process wherein-

(a)   coalescence is provided

(b)  Coagulation is provided

(c)   saturation is provided

(d)  active region is provided

Ques 2. Heat produced at the junction is calculated by the formula

  (a) H = I2Rt

  (b)H = I^2R

  (c) H = I^2Rt

  (d)H = IRt

Ques 3. Arc starting is difficult in-

(a)   submerged arc welding

(b)   merged arc welding

(c)   Deeply merged arc welding

(d)  partially merged

Ques 4. The electro-slag process is fully-

(a) Manual

(b) automatic

(c) semi manual

(d) semi-automatic

Ques 5. Electrode Guide Tube is made of –

(a) Iron

(b)Nickel

(c)Zinc

Ques6. Explain Submerged arc welding process.

Ques7.Define automatic SAW & semi-automatic SAW.

Ques8.Explain method of starting arc by using steel wool or iron powder.

Ques9. What are advantages of SAW.

Ques10. Explain Principle of Electro-slag welding process.