WELDING AND FABRICATION LEVEL-II test 3

 

INSTRUCTION

This paper consists of Five (5) Questions.

Attempt ALL FIVE (5) Question.

 

1. a) What’s Arc blow.

    b) Mention two types of DC arc welding machines.

   c) Mention at least three ways of reducing arc blow during welding.

   d) Why do you remove slag after each run of weld.

 

2. a) Why are electrode made in different size.

    b) Differentiate between two types of polarity include simple sketch.

    c) Differentiate between short circuit Voltage and Arc voltage.

 

3. a) Name three common riveting material.

     b) Write three riveting tools with their uses.

     c) With sketch show two types of riveted joint.

 

4. a) Differentiate between drilling and drill machine.

    b) Mention and state their uses of any five tools used in welding workshop.

     c) Mention two types of acetylene generator

 

5. a) Define the term flashback.

    b) What is the causes of flashback in gase welding and cutting.

    c) State the function of flashback Arrestor.