Practice Pakistan's most useful MCQs for competitive exams

Cast iron vessels are not suitable for the storage of_________________?

• (A)  Freon
• (B)  H2SO4 (95%) at room temperature
• (C)  H2SO4 (fuming)
• (D)  Wet SO2

Answer

Submitted By :Ali Uppal

Which has the maximum melting point out of the following ?

• (A)  Steel
• (B)  Cast iron
• (C)  Stainless steel
• (D)  Wrought iron

Answer

Submitted By :Ali Uppal

Hardened steel is softened by___________________?

• (A)  Normalising
• (B)  Tempering
• (C)  Annealing
• (D)  Carburising

Answer

Submitted By :Ali Uppal

The ‘bomb’ in the bomb calorimeter is made of___________________?

• (A)  Molybdenum stainless steel
• (B)  Mild steel
• (C)  High silicon iron (14% Si)
• (D)  Copper

Answer

Submitted By :Ali Uppal

Softening of hardened steel is done by its_____________________?

• (A)  Normalising
• (B)  Tempering
• (C)  Annealing
• (D)  Carburising

Answer

Submitted By :Ali Uppal

The ability of a material to offer resistance to scratching or indentation is a measure of its_________________?

• (A)  Brittleness
• (B)  Toughness
• (C)  Hardness
• (D)  Resilience

Answer

Submitted By :Ali Uppal

In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of _______________?

• (A)  Concrete
• (B)  Wood
• (C)  Steel
• (D)  Porcelain

Answer

Submitted By :Ali Uppal

A magnetic material becomes ____________ above the Curie temperature?

• (A)  Ferromagnetic
• (B)  Diamagnetic
• (C)  Paramagnetic
• (D)  None of these

Answer

Submitted By :Ali Uppal

Common house hold glass (i.e., soda-lime glass) is a/an _____________ material?

• (A)  Fully crystalline
• (B)  Partly crystalline
• (C)  Amorphous
• (D)  None of these

Answer

Submitted By :Ali Uppal

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 1.2

Answer

Submitted By :Ali Uppal