Engineering Questions with Answers - Multiple Choice Questions

Basic Civil Engineering MCQ’s – Properties and Uses of Aluminium

1 - Question

 Aluminium is commercially produced from:
a) Aluminium sulphate
b) Alum
c) Cryolite
d) Bauxite

View Answer

Answer: d
Explanation: Bauxite is the most commonly used ore of aluminium for production. It occurs as a weathering product of iron and silica.

2 - Question

By which of the below process is Aluminium manufactured?
a) Bayer process
b) Ostwald process
c) Mayer process
d) Haber process

View Answer

Answer: a
Explanation: In the Bayer process, alumina in bauxite is dissolved in caustic soda solution and precipitated to obtain aluminium hydroxide and calcinated to form pure Al2O3.

3 - Question

Which is the most important and useful alloy of Aluminium?
a) Magnalium
b) Silumin
c) Duralumin
d) Magnox

View Answer

Answer: c
Explanation: Duralumin consists of 95% aluminium, 4% copper, 0.5% magnesium and 0.5% manganese. It is widely used in aircraft manufacturing due to its light weight and high strength.

4 - Question

Aluminium has a higher maintenance cost.
a) True
b) False

View Answer

Answer: b
Explanation: Aluminium has excellent corrosion resistance and can withstand weathering, hot and humid conditions also. Hence, maintenance cost required is less.

5 - Question

 Which of the following is a property of aluminium?
a) Hard material
b) Brittle
c) Noise control
d) Magnetic

View Answer

Answer: c
Explanation: Aluminium is an excellent reflector of electromagnetic and sound waves. Therefore, it is less affected by external noise compared to other building materials.

6 - Question

Aluminium appears greyish in colour in pure form.
a) True
b) False

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Answer: b
Explanation: Pure form of Aluminium is white in colour. Its colour can vary from grey to yellow or light green depending on the presence of impurities. Yellow colour is imparted by Iron trichloride (impurity).

7 - Question

 Aluminium finds its application in:
a) Golf clubs
b) Dehydrating agents
c) Waste management
d) Cricket field

View Answer

Answer: a
Explanation: Compared to steel, aluminium is lightweight. Aluminium golf heads, shafts allow golfers to swing faster and increase the ball’s distance with each shot.

8 - Question

What is the melting point of Aluminium?
a) 250oC
b) 658oC
c) 700oC
d) 470oC

View Answer

Answer: b
Explanation: The boiling point of aluminium is 2470oC. It is strong and can be widely used everywhere.

9 - Question

Recycled Aluminium is called:
a) Primary Aluminium
b) Green Aluminium
c) Secondary Aluminium
d) Subsequent Aluminium

View Answer

Answer: c
Explanation: Recycled Aluminium is called secondary aluminium and same properties of primary aluminium.

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