A. Cobalt
B. Zinc
C. Nickel
D. None of these
Related Mcqs:
- Which of the following stainless steels is non-magnetic ?
A. Ferritic
B. Martenistic
C. Austenitic
D. None of these - Which of the following stainless steels is non-magnetic ?
A. Ferritic
B. Martenistic
C. Austenitic
D. None of these - A magnetic material becomes ____________ above the Curie temperature?
A. Ferromagnetic
B. Diamagnetic
C. Paramagnetic
D. None of these - Failure of a material is termed as fatigue failure, if it fails below the yield point. The resistance to fatigue failure of a material is measured by the__________________?
A. Ultimate tensile strength (U.T.S.)
B. Endurance limit
C. Elastic limit
D. None of these - 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 is not a non-ferrous alloy ?
A. Meehanite
B. Magnalium
C. Gun metal
D. Muntz metal - Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?
A. Cast iron
B. Steel
C. Nickel
D. Karbate - Which of the following is the softest material ?
A. Quartz
B. Calcite
C. Corundum
D. Fluorite - The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
A. Lead
B. Copper
C. Aluminium
D. Wrought iron - Which of the following is the most elastic material ?
A. Plastic
B. Glass
C. Steel
D. Rubber
