481. Amount of energy that a material can absorb before its fracture is a measure of its _________________?
A. Toughness
B. Resilience
C. Malleability
D. Ductility

482. Mild steel is a/an ______________ steel?
A. Low carbon
B. Medium carbon
C. High carbon
D. High alloy

483. Iron alloyed with carbon upto 2% is called___________________?
A. Pig iron
B. Wrought iron
C. High carbon steel
D. None of these

484. The electrical conductivity of a ______________ decreases with rise in temperature?
A. Metal/alloy
B. Semi-conductor
C. Dielectric
D. None of these

485. Silicon percentage in iron castings to have maximum hardness should be about__________________?
A. 0.3
B. 0.5
C. 0.8
D. 2.5

486. 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 these

487. Which of the following has a very high carbide forming tendency in steels ?
A. Silicon
B. Chromium
C. Nickel
D. Vanadium

488. Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about_______________?
A. Half
B. One third
C. One fifth
D. One twelfth

489. Brine solution is stored/treated in _______________ lined vessels/pipes?
A. Rubber
B. Lead
C. Glass
D. Nickel

490. White cast iron as compared to grey cast iron is ________________?
A. More durable
B. Very brittle
C. Very hard
D. All A., B. & C.

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