Materials And Construction(Chemical Engineering ) Questions and answers for exam Preparation

Question 1. In hot wire aneomometer used for gas flow measurement, the wire is normally made of

Copper
Platinum
Constantan
Chromium

Explanation:-

Answer: Option B. -> Platinum

Question 2. A magnetic material becomes __________ above the Curie temperature.

Ferromagnetic
Diamagnetic
Paramagnetic
None of these

Explanation:-

Answer: Option C. -> Paramagnetic

Question 3. In SO₃ absorber (Contact Process), packing material used is of

Cast iron
Chemical stoneware
Karbate
Mild steel

Explanation:-

Answer: Option B. -> Chemical stoneware

Question 4. Common house hold glass (i.e., soda-lime glass) is a/an __________ material.

Fully crystalline
Partly crystalline
Amorphous
None of these

Explanation:-

Answer: Option B. -> Partly crystalline

Question 5. To improve the machinability of steel, it is generally subjected to

Spheroidising
Tempering
Normalising
Annealing

Explanation:-

Answer: Option A. -> Spheroidising

Question 6. Which of the following is the hardest material?

Topaz
Quartz
Corrundum
Flourite

Explanation:-

Answer: Option C. -> Corrundum

Question 7. Work hardening of a material

Decreases its tensile strength
Decreases its ductility
Increases its ductility
Does not affect its ductility

Explanation:-

Answer: Option B. -> Decreases its ductility

Question 8. Wrought iron is

High carbon iron
Highly resistance to acid corrosion
Malleable & ductile; and hence is used for chain links, hooks & couplings
An alloy of iron, chromium & carbon

Explanation:-

Answer: Option C. -> Malleable & ductile; and hence is used for chain links, hooks & couplings

Question 9. Which of the following is the softest material?

Quartz
Calcite
Corrundum
Flourite

Explanation:-

Answer: Option B. -> Calcite

Question 10. Wood is corroded by

Hydrochloric acid
SO₂ (dry or wet)
Chlorine (dry or wet)
All of the above

Explanation:-

Answer: Option D. -> All of the above