WELDING SOLDERING AND BRAZING MCQ 3
1) In which of the following form flux does not available?
Powder
Liquid
Paste
Vapour
Correct Answwr- (D)
2) The functions performed by the flux are
clean the joining surface
prevent from oxidisation
help to melt the Solder
All of the above
Correct Answwr- (D)
3) For brazing, speltar is an alloy of
tin and lead
tin, lead and aluminium
silver, copper and zinc
None of these
Correct Answwr- (C)
4) The method of cleaning of the surfaces of soldering is
a) mechanical method
b) chemical method
c) electrical method
d) Both (a) and (b)
Correct Answwr- (D)
5) For cleaning of copper ………….. is used.
nitric acid
dilute sulphuric acid
concentrated sulphuric acid
dilute Hcl
Correct Answwr- (A)
6) Grease can be removed from surface by using
solvent of alcohol carbon tetrachloride
solvent Of alcohol carbon pentachloride
by using ammonia
None of the above
Correct Answwr- (A)
7) Which one of the following is a method of soldering?
Soldering iron method
Spray method
Resistance method
All of these
Correct Answwr- (D)
8) The function of flux during soldering is
to prevent corrosion
to avoid porosity in solder
to promote wet surface
to remove oxides from the soldering surface
Correct Answwr- (D)
9) Which one of the following is not the function of flux in braze welding?
Chemically clean the joint
Evaporate before melting the filler metal
Remove impurities from the joint
Allow molten filler metal to flow easily
Correct Answwr- (B)
10) The electric soldering iron consists of
handle
shank
bit-tip
All of these
Correct Answwr- (D)
11) After cleaning the soldering equipment a thick layer of resin is coated on
shank
bit
handle
None of these
Correct Answwr- (B)
12) After soldering ………………. is removed from the surface of metal
a) flux
b) filler metal
c) Both (a) and (b)
d) None of these
Correct Answwr- (A)
13) The process by which metal remains in its original structure after joining is
a) soldering
b) brazing
c) Both (a) and (b)
d) welding
Correct Answwr- (C)
14) The soldering iron is kept …… after use.
in its box
anywhere
on a table
in a stand
Correct Answwr- (D)
15) The filler metal used for brazing of aluminium is
a) Cu-P
b) Mg
c) Al-Si alloy
d) None of these
Correct Answwr- (C)
16) For brazing of magnesium alloy, the filler metal used is
a) Mg
b) Mg-Cu-Zn
c) Ni-Ag
d) None of these
Correct Answwr- (A)
17) The major constituent of flux for gold-copper alloys in brazing is
a) borax
b) flouride
c) chloride
d) Both (b) and (C)
Correct Answwr- (A)
18) In which of the following operation the mechanical property of material changes at joint?
Soldering
Brazing
Welding
All of these
Correct Answwr- (C)
19) Which of the following operation required heat treatment after joining?
Welding
Brazing
Soldering
All of these
Correct Answwr- (A)
20) By using oxy-acetylene flame the consumption of acetylene gas in welding of medium steel was 10 litres. The consumption of oxygen from cylinder is
5 litre
10 Iitre
15 Iitre
20 Iitre
