(A) 150^oC to 250^oC

(B) 250^oC to 450^oC

(C) 500^oC to 700^oC

   (D) 700^oC to 900^oC

(A) Resin

(B) NH₄CL

   (C) Borax

(D) Soft iron

(A) Joining plastic sheets

   (B) Hard soldering using brass spelter

(C) Casing in brass

(D) Makeing steel look like brass

(A) Increase fluidity of solder metal

(B) Feel up gaps left in a bad joint

   (C) Carbon steel

(D) Prevent oxides forming

(A) Apply high pressure at edge

   (B) Retain heat

(C) Retain solder

(D) Forge welding

(A) Soldering iron

(B) Induction furnace

(C) Electric resistance method

   (D) Any of the above

(A) Brass

(B) Tin

(C) Steel

   (D) Copper

(A) 40^oC to 100^oC

(B) 180^oC to 250^oC

(C) 300^oC to 500^oC

(D) 600^oC to 900^oC

(A) 10 to 15%
(B) 15 to 20%
(C) 20 to 30%
(D) 30 to 40%

(A) horizontally
(B) vertically
(C) in the parallel direction
(D) in all directions