Tempering of steel is done to make it________________?
Tempering of steel is done to make it________________?
A. Brittle
B. Hard
C. Rollable
D. Soft
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All materials obey Hooke’s law within elastic limit. When elastic limit is reached, the tensile strain__________________?
All materials obey Hooke’s law within elastic limit. When elastic limit is reached, the tensile strain__________________?A. Increases very quickly
B. Decreases very quickly
C. Increases in proportion to stress
D. Decreases in proportion to stressCombination of metals and ceramics are called___________________?
Combination of metals and ceramics are called___________________?A. Metalloy
B. Cermets
C. Pellets
D. Non-crystalline ceramicsCarbon content in plain carbon steel is ______________ percent?
Carbon content in plain carbon steel is ______________ percent?A. 0.1 to 0.15
B. 0.35 to 0.45
C. 0.65 to 0.80
D. 0.85 to 1.2Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines ?A. Silicon steel
B. Chromium steel
C. Molybdenum steel
D. None of theseCeramic materials__________________?
Ceramic materials__________________?A. Are exemplified by clay and mica
B. Are poor electrical conductors due to lack of free electrons
C. Never exhibit polymorphism
D. All A., B. and C.Wood is corroded by__________________?
Wood is corroded by__________________?A. Hydrochloric acid
B. SO2 (dry or wet)
C. Chlorine (dry or wet)
D. All A., B. and C.