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. Which operation is to remove burrs from a plate after cutting ?

A) Brushing B) Filing C) Scraping D) Chiseling

. The reading accuracy of steel rule is

A) 0.1 mm B) 0.5mm C) 0.25 mm D) 0.2 mm

. The weight of an engineer's hammer used for marking purposes, is

A) 500 gms B) 150 gms C) 250 gms D) 200 gms

. What happened if bench vice is over tightened ?

A) Box nut damaged B) Spindle damaged
C) Work bench damaged D) Work pieces damaged

. The angle of the prick punch is

A) 45° B) 60° C) 30° D) 90°

. Which of the following metal is used for making nozzle in gas welding ?

A) Brass B) Bronze C) Copper D) Silver

. What is the purpose of copper coating on mild steel filler rod used in gas welding ?

A) Rust proof B) Water proof
C) Moisture proof D) Increased filler dia

. Oxygen becomes liquefied at which temperature in normal atmospheric pressure ?

^) 00 B) —218.4°C C) -4°C 0) -182.90

. What is the base for selecting the nozzle size for gas welding of a pipe ?

A) Groove angle B) Welding position
C) Pipe wall thickness D) Diameter of pipe

What flux is to be used for gas welding stainless steel plates ?
A) Borox flux

B)

C) Cryolite and barium chloride

D) Zinc chloride and potassium dichromate paste

Anti - Borox

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