GROUP 4 - NITTTR ECB Quiz

Which of the following correctly represents the unit of Rockwell hardness?

• BHN

• HRC

• VHN

• RW

Porosity in welds is caused due to

• Excessive welding speed

• Presence of moisture or gas entrapment

• Improper electrode angle

• High welding current

Steel is an alloy of Iron and Undercut in welding refers to:

• A groove melted into the base metal next to the weld toe

• A crack in the weld

• A type of filler metal

• Improper electrode selection

Which defect is caused by improper cleaning of the weld joint before welding?

• Hot cracking

• Slag inclusion

• Undercut

• Lack of fusion

Which of the following is a property of fluids?

• Fixed shape

• Incompressibility

• Ability to flow

• Fixed volume