A. Silver
B. Copper
C. Zinc
D. Nickel
Related Mcqs:
- Percentage of silver in German silver is__________________?
A. 5
B. 10
C. 20
D. 0 - Invar contains the highest percentage of___________________?
A. Vanadium
B. Iron
C. Tungsten
D. Cobalt - German silver is an alloy of copper, nickel and________________?
A. Zinc
B. Silver
C. Tin
D. Lead - German silver in an alloy of________________?
A. Copper, nickel and zinc
B. Copper, aluminium and silver
C. Silver, zinc and aluminium
D. Silver, nickel and zinc - Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?
A. Armature of small motors/generators
B. Generators and small motors
C. Induction motors
D. High frequency transformers - Which of the following contains maximum percentage of carbon ?
A. Boiler plate steel
B. Rail steel
C. Saws for cutting steel
D. Railway spring steel - Which one contains the least percentage of carbon ?
A. Wrought iron
B. High speed steel
C. Cast iron
D. Pig iron - Silicon percentage in iron castings to have maximum hardness should be about__________________?
A. 0.3
B. 0.5
C. 0.8
D. 2.5 - The maximum percentage of chromium that can be added to steel is about____________________?
A. 12
B. 18
C. 24
D. 30 - Softness of silver can be converted into hardness by alloying it with small quantity of_________________?
A. Copper & nickel
B. Zinc
C. Aluminium
D. Tin
