Practice Pakistan's most useful MCQs for competitive exams

Visco-elastic behaviour of materials which is time dependent is common in______________?

• (A)  Plastics
• (B)  Crystalline solid
• (C)  Non-crystalline solids
• (D)  Non-crystalline organic polymer

Answer

Submitted By :Ali Uppal

Steel balls for ball bearings are generally made of ______________ steel?

• (A)  Cast
• (B)  Stainless
• (C)  Free carbon
• (D)  Carbon chrome

Answer

Submitted By :Ali Uppal

The most distinguished property of malleable cast iron is its high_________________?

• (A)  Ductility
• (B)  Hardness
• (C)  Malleability
• (D)  None of these

Answer

Submitted By :Ali Uppal

A metallic alloy in which one of the constituent metal is _____________, is called an amalgam?

• (A)  Zinc
• (B)  Mercury
• (C)  Lead
• (D)  Tin

Answer

Submitted By :Ali Uppal

Which of the following is the most widely used insulating material for steam carrying pipelines ?

• (A)  Ceramic fibre blanket
• (B)  Glass wool and 85% magnesia
• (C)  Vermiculite
• (D)  Slag wool

Answer

Submitted By :Ali Uppal

Steel pipes are normally manufactured by ______________ process?

• (A)  Extrusion
• (B)  Cold working
• (C)  Forging
• (D)  Electroforming

Answer

Submitted By :Ali Uppal

Which of the following is the hardest material ?

• (A)  Topaz
• (B)  Quartz
• (C)  Corundum
• (D)  Fluorite

Answer

Submitted By :Ali Uppal

Cast iron compared to steel is better in__________________?

• (A)  Ductility
• (B)  Fluidity & castability
• (C)  Strength
• (D)  Malleability

Answer

Submitted By :Ali Uppal

_____________ moulding process cannot be used for thermoplastic plastics?

• (A)  Compression
• (B)  Extrusion
• (C)  Injection
• (D)  None of these

Answer

Submitted By :Ali Uppal

Which of the following metals in not used for coating of the base metal to guard it against corrosion ?

• (A)  Lead
• (B)  Cadmium
• (C)  Magnesium
• (D)  Aluminium

Answer

Submitted By :Ali Uppal