Factors to be Considered While Selecting Materials for Construction MCQ - Set 28 - ObjectiveBooks

Factors to be Considered While Selecting Materials for Construction MCQ - Set 28

Practice Test: Question Set - 28

1. Copper has very low
    (A) Malleability
    (B) Ductility
    (C) Tensile strength
    (D) Thermal & electrical conductivity

2. Hammers and railway rails are normally made of
    (A) Mild steel
    (B) Dead mild steel
    (C) Medium carbon steel
    (D) High carbon steel

3. Which of the following pairs of elements may form an alloy?
    (A) Iron & carbon
    (B) Iron & mercury
    (C) Platinum & mercury
    (D) None of these

4. __________ is added in stainless steel to prevent inter crystal corrosion.
    (A) Vanadium
    (B) Niobium
    (C) Chromium
    (D) Nickel

5. Sulphur melting pit in the sulphuric acid plant is made of
    (A) Lead lined stainless steel
    (B) Cast iron
    (C) Steel or cement-brick lined
    (D) Hard wood

6. Cermets are used for making
    (A) Cutting tools
    (B) Abrasives
    (C) Both (a) & (b)
    (D) Neither (a) nor (b)

7. Evaporators used in caustic soda recovery and production plant are made of
    (A) Monel metal
    (B) Gun metal
    (C) Wood metal
    (D) Babbitt metal

8. German silver used for decorative purposes contains maximum percentage of
    (A) Silver
    (B) Copper
    (C) Zinc
    (D) Nickel

9. All materials obey Hooke's law within elastic limit. When elastic limit is reached, the tensile strain
    (A) Increases very quickly
    (B) Decreases very quickly
    (C) Increases in proportion to stress
    (D) Decreases in proportion to stress

10. White metal is an alloy of
    (A) Lead, tin and cadmium
    (B) Copper, tin and zinc
    (C) Copper and lead
    (D) None of these

11. The addition of antimony in tin-based alloys improves its
    (A) Rupture strength and hot hardness
    (B) Impact strength and bonding strength
    (C) Deformation resistance
    (D) Wear resistance

12. Pure nickel is
    (A) Ferromagnetic above its curie point (i.e., 415°C)
    (B) Having h.c.p. crystal lattice
    (C) Ferromagnetic at room temperature
    (D) Not resistant to oxidation at high temperature

13. Which one is remelted and poured into moulds to get cast iron?
    (A) Wrought iron
    (B) Pig iron
    (C) Low carbon steel
    (D) Mild steel

14. Heavy duty bearings are usually made of
    (A) White metal
    (B) Phosphorous bronze
    (C) Monel
    (D) Zinc

15. Lead is
    (A) Not resistant to corrosion
    (B) Used as a cathodic material
    (C) Not used as pigment (in its compound forms) for paints
    (D) Used as a shock absorber (in mattress form) between the foundation and steel framework of skyscraper buildings

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