Green Building Materials Multiple Choice Questions - Set 03 - ObjectiveBooks

Green Building Materials Multiple Choice Questions - Set 03

Practice Test: Question Set - 03

1. Karbate is
    (A) A mixture of iron dust and saw dust
    (B) Carbon impregnated with resin (usually Bakelite)
    (C) An acid resistant material
    (D) Both (b) and (c)

2. Post weld heat treatment is done by
    (A) Normalizing
    (B) Stress relieving
    (C) Tempering
    (D) Solution annealing

3. Pick out the wrong statement.
    (A) Wrought iron contains about 0.02% carbon
    (B) Wrought iron cannot be easily forged and welded
    (C) The chilled cast iron does not contain graphite
    (D) Spheroidal grey cast iron contains graphite flakes

4. Rotary kilns in cement industry are lined with _________bricks.
    (A) Fireclay
    (B) Silica
    (C) Lead
    (D) High alumina & high magnesia

5. Maximum consumption of lead is in the manufacture of
    (A) Storage batteries
    (B) Solder alloys
    (C) Electric cable sheathing
    (D) Lead lined vessels

6. Wrought iron is having very high
    (A) Hardness
    (B) Strength
    (C) Corrosion resistance
    (D) Susceptibility to changes in its properties by heat treatment

7. Maximum permissible sulphur content in steel is __________ percent.
    (A) 0.015
    (B) 0.055
    (C) 0.505
    (D) 0.805

8. A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds.
    (A) 5
    (B) 100
    (C) 250
    (D) 500

9. Mild steel is a/an __________ steel.
    (A) Low carbon
    (B) Medium carbon
    (C) High carbon
    (D) High alloy

10. Presence of cobalt in steel improves its
    (A) Cutting ability
    (B) Corrosion resistance
    (C) Tensile strength
    (D) None of these

11. Carbon is present in steel wholly in the
    (A) Combined form
    (B) Free state as graphite
    (C) Both (a) and (b)
    (D) Neither (a) nor (b)

12. Bush bearings are made of
    (A) Mild steel
    (B) Phosphorous bronze
    (C) White metal alloys
    (D) None of these

13. Lead lined equipments & vessels are suitable for handling
    (A) Hydrochloric acid (10%)
    (B) Nitric acid
    (C) Sulphuric acid upto 60°C
    (D) All (a), (b) and (c)

14. How many atoms are there per unit cell in a body centered cubic lattice system?
    (A) 6
    (B) 5
    (C) 3
    (D) 2

15. Evaporator used for concentrating tomato juice is made of
    (A) Nickel
    (B) Brass
    (C) Stainless steel-glass lined
    (D) Cast iron-rubber lined

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