Chemical Engineering Basics - Practice Test

[#1011] Which of the following has the highest value of refractive index?

(A) Brine (sea water)

(B) Diamond

(C) Distilled water

(D) Glass

Correct Answer

(B) Diamond

[#1012] A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.

(A) 6.7

(B) 7.6

(C) 10.3

(D) 15.2

Correct Answer

(A) 6.7

[#1013] Brittleness induced due to the presence of sulphur in steel can be reduced by adding

(A) Manganese

(B) Magnesium

(C) Vanadium

(D) Copper

(E) Manganese

(F) Magnesium

(G) Vanadium

(H) Copper

Correct Answer

(A) Manganese
(E) Manganese

[#1014] Wrought iron is not

(A) Uctile & resistant to corrosion/rusting

(B) Weldable easily

(C) Having uniform strength in all directions

(D) Having maximum tensile strength along the lines of slag distribution

Correct Answer

(C) Having uniform strength in all directions

[#1015] Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.

(A) Grey

(B) Red

(C) Orange

(D) Violet

Correct Answer

(B) Red

Chemical Engineering Basics - Study Mode

[#1011] Which of the following has the highest value of refractive index?

Correct Answer

[#1012] A machine having assumed life of 20 years is purchased for Rs 32000/-. Its scrap value at the end of its life is Rs 8000/-. If the depreciation is calculated by diminishing balance method, then percentage reduction in its value at the end of first year is __________ percent.

Correct Answer

[#1013] Brittleness induced due to the presence of sulphur in steel can be reduced by adding

Correct Answer

[#1014] Wrought iron is not

Correct Answer

[#1015] Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.

Correct Answer