- A. Half
- B. One third
- C. One fifth
- D. One twelfth
Materials and Construction
-
Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about_____.
-
Brass container is suitable for storing_____.
- A. Aqueous ammonia
- B. Beer
- C. H₂SO₄(95%)
- D. Phosphoric acid (95%)
-
Which metal is protected by the layer of its own oxide?
- A. Iron
- B. Silver
- C. Calcium
- D. Aluminium
-
Wrought iron is having very high_____.
- A. Hardness
- B. Strength
- C. Corrosion resistance
- D. Susceptibility to changes in its properties by heat treatment
-
Which of the following crystal structures characterises the austenitic stainless steel?
- A. Simple hexagonal
- B. Body centred cubic
- C. Face centred cubic
- D. None of these
-
Which of the following alloys does not contain nickel?
- A. Chlorinet – 2 alloy
- B. Monel
- C. Inconel
- D. Babbit metal
-
_____ does not contain tin as an alloying material.
- A. Brass
- B. Pewter
- C. Solder
- D. Babbit metal
-
Which of the following is the hardest material?
- A. Topaz
- B. Quartz
- C. Corrundum
- D. Flourite
-
Hydrochloric acid is _____ corrosive to common metals.
- A. Least
- B. Not
- C. Mildly
- D. Highly
-
Beehive coke ovens are made of ______ bricks.
- A. Silica
- B. Fireclay
- C. Silicon carbide
- D. Corundum