Lightweight Building Materials Questions with Answers - Set 16 - ObjectiveBooks

Lightweight Building Materials Questions with Answers - Set 16

Practice Test: Question Set - 16

1. __________ is used for examining the macro-structure of a material.
    (A) Metallurgical microscope
    (B) Optical microscope
    (C) X-rays
    (D) Visual inspection by naked eye

2. Hydrochloric acid absorber in made of
    (A) Cast iron
    (B) Mild steel
    (C) Karbate
    (D) Stainless steel

3. An alloy of iron containing 4% carbon is called
    (A) High carbon steel
    (B) Wrought iron
    (C) Mild steel
    (D) None of these

4. Tempering of steel is done to make it
    (A) Brittle
    (B) Hard
    (C) Rollable
    (D) Soft

5. Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium
    (A) Tin, nickel, iron and chromium
    (B) And graphite
    (C) And copper
    (D) None of these

6. Cold work tool steel should have
    (A) High toughness
    (B) Poor hardenability
    (C) High wear resistance
    (D) All (a), (b) & (c)

7. The softest material in Mho's scale (for measuring hardness) is
    (A) Talc
    (B) Gypsum
    (C) Rubber
    (D) None of these

8. Alpha iron is stable __________ °C.
    (A) Above 1403
    (B) Upto 910
    (C) Above 1800
    (D) Between 910 & 1403

9. Wrought iron is
    (A) High carbon iron
    (B) Highly resistance to acid corrosion
    (C) Malleable & ductile; and hence is used for chain links, hooks & couplings
    (D) An alloy of iron, chromium & carbon

10. Light weight metallic alloy used in aircraft industry is
    (A) Aluminium
    (B) High silicon (14%) iron
    (C) Duralumin
    (D) Phosphor bronze

11. Rubber lined vessels are corroded by the action of
    (A) Aqua regia
    (B) Chloroform
    (C) Sulphuric acid (95%)
    (D) All (a), (b) and (c)

12. Acid proof stoneware
    (A) Has very low strength
    (B) Cannot be heated
    (C) Is broken by small temperature changes
    (D) All (a), (b) and (c)

13. Spray dryer for evaporating milk to produce milk powder is made of
    (A) Lead lined steel
    (B) Stainless steel
    (C) Aluminium
    (D) Cast iron

14. Babbitt metal (used for making bearings) comprises of
    (A) Mainly tin (85%) and lead
    (B) Saw dust and iron dust mixture
    (C) Zinc and aluminium
    (D) Copper and aluminium

15. In a plate type heat exchanger, heat transfer plates are never made of
    (A) Stainless steel
    (B) Cast iron
    (C) Titanium
    (D) Hastelloy C

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