Materials And Construction MCQs | Page - 4

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R

Ram Sharma • 193.86K Points
Coach

Q. Balls in a ball mill are usually made of

(A) Steel
(B) Cast iron
(C) Stainless steel
(D) Bronze
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Ram Sharma • 193.86K Points
Coach

Q. Concentrated HCl at 30°C can be stored in a vessel made of 

(A) Cast iron and aluminium
(B) Stainless steel and high silicon cast iron
(C) PTFE and porcelain
(D) None of these
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R

Ram Sharma • 193.86K Points
Coach

Q. Brine (15% concentration) can be stored in a vessel made of

(A) Cast iron
(B) Monel
(C) Karbate
(D) None of these
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Ram Sharma • 193.86K Points
Coach

Q. A bearing metal should not have

(A) Enough plasticity
(B) Low thermal conductivity
(C) Low co-efficient of friction
(D) High toughness
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R

Ram Sharma • 193.86K Points
Coach

Q. White cast iron as compared to grey cast iron is

(A) More durable
(B) Very brittle
(C) Very hard
(D) All of the above
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R

Ram Sharma • 193.86K Points
Coach

Q. Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)2. Lead pipes are readily corroded by

(A) Dilute HCI
(B) Acetic acid
(C) Concentrated H2SO4
(D) None of these
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Ram Sharma • 193.86K Points
Coach

Q. To improve the machinability of steel by its softening, it is subjected to

(A) Cold working
(B) Annealing
(C) Shot blasting
(D) Heating
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Ram Sharma • 193.86K Points
Coach

Q. Which of the following is the most widely used insulating material for steam carray-ing pipelines? 

(A) Ceramic fibre blanket
(B) Vermiculite
(C) Slag wool
(D) Glass wool and 85% magnesia
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Ram Sharma • 193.86K Points
Coach

Q. 18/8 stainless steel means, that it contains

(A) 18% chromium and 8% nickel
(B) 18% chromium and 8% molybdenum
(C) 18% nickel and 8% chromium
(D) 18% molybdenum and 8% chromium
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Ram Sharma • 193.86K Points
Coach

Q. Which of the following is produced by condensation polymerisation?

(A) Bakelite
(B) Polythene
(C) Poly vinyl chloride
(D) Polystyrene
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