Construction Aggregate MCQ Questions Answers - Set 04 - ObjectiveBooks

Construction Aggregate MCQ Questions Answers - Set 04

Practice Test: Question Set - 04

1. Pick out the correct statement.
    (A) Stainless steel is nothing but chromium coated steel
    (B) Hardening of a soft metal can be done by alloying it with another metal or non-metal
    (C) Plastic deformation of a material is its temporary distortion under the action of applied stress
    (D) Rusting of iron is not electrochemical in nature

2. Condenser tubes are not made of
    (A) Cartridge brass
    (B) Muntz brass
    (C) Wood metal
    (D) Aluminium brass alloy

3. Nickel base alloys with __________ are known as monel metal.
    (A) Zinc
    (B) Tin
    (C) Copper
    (D) Molybdenum

4. Ball bearings are normally made of __________ steel.
    (A) High speed
    (B) High carbon
    (C) Chrome
    (D) Silicon

5. Glass is corroded by
    (A) Fluorine (dry or wet)
    (B) Sulphuric acid
    (C) Phosphoric acid
    (D) None of these

6. Most of the common metals have __________ crystal structure.
    (A) Cubic
    (B) Hexagonal
    (C) Orthorhombic
    (D) None of these

7. Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower
    (A) Price
    (B) Corrosion resistance
    (C) Thermal conductivity
    (D) Abundant availability

8. Hastelloy C is a good material of construction in chemical process industry, since it is
    (A) Highly corrosion resistant and is readily fabricated
    (B) Relatively inexpensive although it can be fabricated with some difficulty
    (C) Corrosion resistant to most alkalis, particularly because of its copper content
    (D) Light and resists attack by acids

9. Nickel as a material of construction
    (A) Is used as an alloying element for both ferrous & non-ferrous alloys
    (B) Is paramagnetic below 415° C (its Curie temperature)
    (C) Diamagnetic
    (D) Has a body centered cubic (bcc) crystal lattice structure

10. Bell metal is an alloy of
    (A) Copper & zinc
    (B) Copper & tin
    (C) Copper & nickel
    (D) Zinc & tin

11. 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 HCl
    (B) Acetic acid
    (C) Concentrated H2SO4
    (D) None of these

12. The specific gravity of coal depends mainly on its __________ content.
    (A) Carbon
    (B) Volatile matter
    (C) Ash
    (D) Moisture

13. Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system?
    (A) High silicon iron, silicon rubber, Kel-F and Teflon
    (B) Mild steel and stainless steel
    (C) Mild steel and stainless steel
    (D) Cast iron, tin and aluminium

14. Bog iron used for the adsorption of H2S from coke oven gas is
    (A) An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide)
    (B) Iron impregnated with resin (usually Bakelite)
    (C) Carbon free iron
    (D) None of these

15. Beehive coke ovens are made of __________ bricks.
    (A) Silica
    (B) Fireclay
    (C) Silicon carbide
    (D) Corundum

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