Related Questions

Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
A 12
B 36
C 54
D 68
Invar tapes used for measuring base lines, is made of nickel-iron alloy containing nickel
A 24 %
B 36 %
C 40 %
D 60 %
Nickel is a __________ material.
A soft
B non-ductile
C non-metallic
D ductile
Nickel as a material of construction
A Is used as an alloying element for both ferrous & non-ferrous alloys
B Is paramagnetic below 415°C (its Curie temperature)
C Dimagnetic
D Has a body centred cubic (bcc) crystal lattice structure
Which disease is caused by Nickel?
A Itai Itai
B Dermatitis
C Learning disability
D Asthma
Nickel when added to copper improves
A Machinability
B Hardness
C Hardness and strength
D Strength and ductility
Nimonic contains __________ percentage of nickel as that of Inconel.
A Same
B Less
C More
D None of these
During the charging and discharging of a nickel-iron cell
A corrosive fumes are produced
B water is neither formed nor absorbed
C nickel hydroxide remains unsplit
D its e.m.f. remains constant
The active materials of a nickel-iron battery are
A nickel hydroxide
B powdered iron and its oxide
C 21% solution of kOH
D all of the above
As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its
A compactness
B lower e.m.f.
C small quantity of electrolyte used
D higher internal resistance

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