1 Which one of the following is a semi-permanent joint?
A Forging
B Welding
C Riveting
D Bolt and nut 

2 What type of rivets can be used in soft metal work?
A Pan head
B Snap head
C Conical
D Counter head

3 Which kind of mechanical part to used to clamp two

parts together?

A Bolts and nuts

B Welding

C Soldering

D Brazing

4 What is the melting temperature of soft soldering?

A Below 420’c

B 450’c

C 500’c

D 600’c

5 If the metals using copper zinc and in alloys in filler

material, what is the heading temperature of the metal?

A Above 420°c below 850°c

B Above 120°c below 350°c

C Above 860°c below 900°c

D Above 910°c below 1000°c

6 Which kind of metal made of soldering irons?

A Copper or copper alloys

B Brass or brass alloys

C Aluminium or aluminium alloys

D Zinc or zinc alloys

7 Which one is a very good conductor of heats?

A Glass

B Brass

C Copper

D Rubber

8 Which kind of solders used to make cooling utensil?

A Pure tin

B Tin line

C Tin and lead

D Tin and copper

9 Soft solder melting point is....

A 250’

B 350’

C 450’

D 500’

17 The chemical compound applied to the joint before

soldering is called....

A Flux

B Filler rod

C Iron powder

D iron particales

18 In the following flux which one is inorganic flow?

A Tallow

B Resin

C Iron powder

D Zinc chloride

19 The colour of resin is....

A Blue

B Amber

C Maroon

D Yellow

20 Which one of the flux is used to electrical soldering

work?

A Tallow

B Resin

C Zinc chloride

D Hydro chloric acid

21 Tallow flux is a form of?

A Animal fat

B Pine tree sap

C Neem free sap

D Animal skin