C:-Punching
D:-Drifting
Correct Answer:- Option-B
Question86:-What is the purpose of groover in sheetmetal?
A:-Releasing of seam
B:-Compress the seam
C:-Closing and locking the seam
D:-Stress relieving during seaming
Correct Answer:- Option-C
Question87:-What is the maximum cutting capacity of straight snips?
A:-20 SWG
B:-19 SWG
C:-18 SWG
D:-16 SWG
Correct Answer:- Option-A

Question88:-Which rivet is most suitable for riveting soft materials like leather,
plastics etc?

A:-Snap head rivet
B:-Conical head rivet
C:-Counter sunk rivet
D:-Bifurcated rivet
Correct Answer:- Option-D
Question89:-Caulking is an operation of
A:-pressing the whole surface of the edge of the plate
B:-closing down the edges of the plates and heads of the rivet
C:-closing down the center surface of the plate
D:-pressing the plates
Correct Answer:- Option-B
Question90:-The formula generally used in the shop floor, length of snap head rivet
15
A:-L=T +d (1.3 - 1.6)

B-L=T+15D
C-L=T+d
D-L=TxD

Correct Answer:- Option-B
Question91:-Electrode size refers
A:-diameter of its core wire
B:-diameter of electrode
C:-length of the electrode
D:-thickness of flux coating
Correct Answer:- Option-A
Question92:-Arc blow is caused by
A-electronic disturbance
B:-magnetic disturbance
C:-electric disturbance
D:-radio disturbance
Correct Answer:- Option-B

Question93:-The welding machine which is used to convert AC Welding Supply to
DC Welding Supply

A:-engine generator set
B:-motor generator set
C:-transformer set
D:-rectifier set
Correct Answer:- Option-D
Question94:-Name the flame which contains more acetylene and less oxygen
A:-Oxidizing flame
B:-Neutral flame
C:-Carburizing flame
D:-Common flame
Correct Answer:- Option-C