Practice Pakistan's most useful MCQs for competitive exams

White cast iron as compared to grey cast iron is ________________?

• (A)  More durable
• (B)  Very brittle
• (C)  Very hard
• (D)  All

Answer

Submitted By :Ali Uppal

Brine solution is stored/treated in _______________ lined vessels/pipes?

• (A)  Rubber
• (B)  Lead
• (C)  Glass
• (D)  Nickel

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

Which of the following has a very high carbide forming tendency in steels ?

• (A)  Silicon
• (B)  Chromium
• (C)  Nickel
• (D)  Vanadium

Answer

Submitted By :Ali Uppal

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

Answer

Submitted By :Ali Uppal

Silicon percentage in iron castings to have maximum hardness should be about__________________?

• (A)  0.3
• (B)  0.5
• (C)  0.8
• (D)  2.5

Answer

Submitted By :Ali Uppal

The electrical conductivity of a ______________ decreases with rise in temperature?

• (A)  Metal/alloy
• (B)  Semi-conductor
• (C)  Dielectric
• (D)  None of these

Answer

Submitted By :Ali Uppal

Iron alloyed with carbon upto 2% is called___________________?

• (A)  Pig iron
• (B)  Wrought iron
• (C)  High carbon steel
• (D)  None of these

Answer

Submitted By :Ali Uppal

Mild steel is a/an ______________ steel?

• (A)  Low carbon
• (B)  Medium carbon
• (C)  High carbon
• (D)  High alloy

Answer

Submitted By :Ali Uppal

Amount of energy that a material can absorb before its fracture is a measure of its _________________?

• (A)  Toughness
• (B)  Resilience
• (C)  Malleability
• (D)  Ductility

Answer

Submitted By :Ali Uppal