METALS MCQ 1
METALS (Non ferrous & its alloys) MCQ 1
1) Which anticorrosive metal is widely used for Surface coating on iron sheets for galvanizing …………
Brass
Tin
Copper
Zinc
Correct Answer- (C)
2) Brass is an alloy of ………….
copper and tin
copper and zinc
lead and tin
copper and lead
Correct Answer- (D)
3) Aluminium is extracted from the ore.
aluminium oxide
Bauxide
mangnetite
Pyrites
Correct Answer- (B)
4) Generally underground telephone and power cable are protected from corrosion by ………..
chromium
nickel
Lead
copper
Correct Answer- (C)
5) Which non ferrous metal tensile strength can be Increased by hammering or rolling?
Lead
Zinc
Tin
Copper
Correct Answer- (A)
6) Gun metal is an alloy of……….
Brass, Zinc and Lead
Copper Tin and White Matel
Copper, Tin and Zinc
Copper, Lead and Zinc
Correct Answer- (C)
7) Which kind of material to be used for hard soldering purpose?
Lead
Iron
Tin
Copper
Correct Answer- (D)
8) The composition of electrician solder is ……….
Lead-50%, tin-50%
Lead-70%, tin-30%
Lead-63%, tin-37%
Lead-37%, tin-63%
Correct Answer- (D)
9) As compared to iron, aluminium has …………….
Higher tendency to oxidize
Less tendency to oxidize
Equal tendency to oxidize
None of these
Correct Answer- (C)
10) Iron is galvanized by coating with …………….
Tin
Nickel
Copper
Zinc
Correct Answer- (D)
11) Which of the following materials has the maximum ductility?
Mild steel
Copper
Aluminium
Zinc
Correct Answer- (B)
12) Medium solder contains ………………
37% lead and 63% tin
50% lead and 50% tin
70% lead and 30% tin
None of these
Correct Answer- (B)
13) Best conductor of heat and electricity is …………………………..
Copper
Chromium
Nickel
Aluminium
Correct Answer- (A)
14) Brass in an alloy of ………………..
Copper and Zinc
Copper and Silver
Lead and Tin
Copper and Tin
Correct Answer- (A)
15) An alloy is a …………….
Mixture of metals in any proportion
Mixture of two non-metals
Pure metal
Mixture of metals in fixed proportion
Correct Answer- (A)
16) Bronze is an alloy of
Copper and iron
Copper and Aluminium
Copper and Nickel
Copper and Tin
Correct Answer- (D)
17) Which of the following is not an alloy?
Steel
Bronze
Copper
Brass
Correct Answer- (C)
18) Duralumin is an alloy of
Aluminium and Carbon
Aluminium and mercury
Aluminium and Copper
Aluminium and iron
Correct Answer- (C)
19) Which of the following alloy is used in making aircraft structures?
Manganin
Bronze
Duralumin
Brass
Correct Answer- (C)
20) Magnesium is used in high resistivity electrolytes due to its
Neutral potential
Most negative potential
Most positive potential
Zero potential
