A. A mixture of iron dust and saw dust
B. Carbon impregnated with resin (usually Bakelite)
C. An acid resistant material
D. Both B. and C.
Related Mcqs:
- The most resistant material to alkaline corrosion is____________________?
A. Duriron
B. Nickel
C. Aluminium
D. Karbate - The heat treatment process to which castings and the steel balls produced by cold heading are subjected is____________________?
A. Tempering
B. Normalising
C. Annealing
D. None of these - Monel alloy is____________________?
A. The costliest of all the alloys of nickel
B. Not suitable for making kitchen utensils
C. Used for making steam valves and turbine blades as it resists steam attack at high temperature
D. Not used in cast and wrought forms - Dielectric strength of a material is____________________?
A. Its energy storage capacity
B. A magnetic property
C. Its capacity to resist the flow of current
D. Its capacity to withstand high voltage - To improve the machinability of steel by its softening, it is subjected to __________________?
A. Cold working
B. Annealing
C. Shot blasting
D. Heating - Caustic soda is transported in _____________ lined containers ?
A. Glass
B. Nickel
C. Neoprene
D. Either B. or C. - Wrought iron is a suitable material of construction for handling _____________ solutions?
A. Dilute acidic
B. Concentrated acidic
C. Alkalis & alkaline
D. None of these - _____________ moulding process cannot be used for thermoplastic plastics?
A. Compression
B. Extrusion
C. Injection
D. None of these - Which of the following is not shipped in mild steel containers ?
A. Acetone
B. Ammonia
C. Ethyl alcohol
D. Formic acid - Pick out the wrong statement ?
A. Alloys are harder than their component elements
B. Presence of silicon in steel decreases its electrical resistance
C. Karbate is an acid resistant material of construction
D. Nichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C
