A. silver, copper, zinc
B. silver, tin, nickel
C. silver, lead, zinc
D. silver, copper, aluminium
E. silver, lead, tin
Related Mcqs:
- Solder is an alloy consisting of________________?
A. tin, antimony, copper
B. tin and copper
C. tin and lead
D. lead and zinc
E. lead and copper - German silver is an alloy of___________________?
A. silver and some impurities
B. refined silver
C. nickel, copper and zinc
D. nickel and copper
E. silver and gold - German silver contains_________________?
A. 1% silver
B. 2.5% silver
C. 5% silver
D. 10% silver
E. 100% silver - The usual composition of a soldering alloy is__________________?
A. tin, lead and small percentage of antimony
B. tin and lead
C. tin, lead and silver
D. tin and copper
E. tin, copper and lead - The correct composition of Babbit metal is__________________?
A. 87.75% Sn, 4% Cu, 8% Sb, 0.25% Bi
B. 90% Sn, 2% Cu, 4% Sb, 2% Bi, 2% Mg
C. 87% Sn, 4% Cu, 8% Sb, 1% Al
D. 82% Sn, 4% Cu, 8% Sb, 3% Al, 3% Mg
E. none of the above - Stress relaxation is- the phenomenon ___________________?
A. in which parts are not loaded
B. in which stress remains constant on in-creasing load
C. in which deformation tends to loosen the joint and produces a stress reduced
D. stress reduces on increasing load
E. none of the above - The unique property of cast iron is its high ___________________?
A. malleability
B. ductility
C. surface finish
D. damping characteristics
E. hardness - Preheating is essential in welding ___________________?
A. cast iron
B. high speed steel
C. all non-ferrous materials
D. all of the above
E. none of the above - Which is false statement about properties of aluminium ___________________?
A. modulus of elasticity is fairly low
B. wear resistance is very good
C. fatigue strength is not high
D. creep strength limits its use to fairly low temperatures
E. corrosion resistance is good - In a static fluid ___________________?
A. resistance to shear stress is small
B. fluid pressure is zero
C. linear deformation is small
D. only normal stresses can exist
E. viscosity is nil
