Practice Pakistan's most useful MCQs for competitive exams

Cast iron detachable joint is used in __________ pipes.

• (A)  Steel
• (B)  Cast iron
• (C)  Asbestos cement
• (D)  Reinforced cement concrete

Answer

Submitted By :Ali Uppal

Presence of even very minute amount (say 0.1%) of ______________ in copper, reduces its electrical conductivity very seriously?

• (A)  Bismuth
• (B)  Arsenic
• (C)  Antimony
• (D)  Both

Answer

Submitted By :Ali Uppal

Muntz metal is a/an alloys of____________________?

• (A)  Magnesium & tin
• (B)  Ferrous material
• (C)  Lead & tin
• (D)  Copper & zinc

Answer

Submitted By :Ali Uppal

Hastelloy comprises of____________________?

• (A)  Copper and tin
• (B)  Copper and nickel
• (C)  Molybdenum and nickel
• (D)  Lead and tin

Answer

Submitted By :Ali Uppal

Carbon content in steel is ___________________ percent?

• (A)  0.1-2
• (B)  4-6
• (C)  2-4
• (D)  0.001-0.01

Answer

Submitted By :Ali Uppal

Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ?

• (A)  Cast iron
• (B)  Steel
• (C)  Nickel
• (D)  Karbate

Answer

Submitted By :Ali Uppal

Corrosion resisting properties of cast iron are significantly improved by the addition of 12 – 15% of___________________?

• (A)  Tungsten
• (B)  Vanadium
• (C)  Silicon
• (D)  All

Answer

Submitted By :Ali Uppal

The hardest material just prior to diamond in Mhos scale is_________________?

• (A)  Topaz
• (B)  Carborundum
• (C)  Corundum
• (D)  Calcite

Answer

Submitted By :Ali Uppal

Carbon is present in the combined form (carbide) in case of______________________?

• (A)  Pig iron
• (B)  Steel
• (C)  Ferroalloys
• (D)  All

Answer

Submitted By :Ali Uppal

Polymorphism is not exhibited by______________________?

• (A)  Carbon
• (B)  Iron
• (C)  Phosphorous
• (D)  None of these

Answer

Submitted By :Ali Uppal