Chemical Engineering Mcqs

Straight silicon steel (containing Si from 0.5 to 5%) because of their low hysteresis loss and high magnetic permeability are used for electrical appliances. Which of the following electrical appliances made of silicon steel contains maximum percentage of silicon (about 4%) ?

(A) Armature of small motors/generators
(B) Generators and small motors
(C) Induction motors
(D) High frequency transformers

Submitted By :Ali Uppal

Mercury is transported in metal containers made of________________?

(A) Aluminium
(B) Iron
(C) Lead
(D) Nickel

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Teflon (PTFE) is corroded by_______________?

(A) Hydrochloric acid (10%)
(B) Hydrochloric acid (95%)
(C) Sulphuric acid
(D) None of these

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Liners of a ball mill are never made of__________________?

(A) Lead
(B) Alloy steel
(C) Rubber or ceramic material
(D) Cast iron

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Which of the following undergoes granular fracture ?

(A) Wrought iron
(B) Steel
(C) Cast iron
(D) None of these

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Reactor used in the production of polyvinyl chloride (PVC) is made of____________________?

(A) Nickel or glass lined steel
(B) Aluminium
(C) Tantalum
(D) Lead

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Presence of manganese in alloy steel improves its___________________?

(A) Corrosion resistance
(B) Cutting ability
(C) Abrasion resistance & toughness
(D) Elasticity & creep resistance

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Cast iron is a ______________ material?

(A) Brittle
(B) Ductile
(C) Tough
(D) Malleable

Submitted By :Ali Uppal

Presence of even 0.005% of _____________ in copper makes it highly brittle, rendering it useless for wire-drawing?

(A) Oxygen
(B) Arsenic
(C) Antimony
(D) Bismuth

Submitted By :Ali Uppal

_____________ is added in low carbon steel to raise its yield point?

(A) Sulphur
(B) Phosphorous
(C) Silicon
(D) Manganese

Submitted By :Ali Uppal

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