Chemical Engineering Basics - Study Mode

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[#581] Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.

(A) 0.5 to 1

(B) 10 to 15

(C) 300 to 500

(D) 1000 to 1500

Correct Answer

(A) 0.5 to 1

[#582] Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water)?

(A) Aluminium

(B) Copper

(C) Titanium

(D) Stainless steel

Correct Answer

(C) Titanium

[#583] Which of the following is not a principal alloying element for the structural steel?

(A) Molybednum

(B) Nickel

(C) Manganese

(D) Chromium

Correct Answer

(A) Molybednum

[#584] Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and

(A) Manganese

(B) Silicon

(C) Nickel

(D) Chromium

Correct Answer

(A) Manganese

[#585] Presence of small quantity of sulphur in low carbon steel improves its

(A) Formability

(B) Machinability

(C) Weldability

(D) Hardenarality

Correct Answer

(B) Machinability