This set of Basic Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Manufacture of Brick”.
1. Which one of the below is the first step in the preparation of brick earth process?
b) Site selection
Explanation: Site selection is the step in the manufacturing of brick process. The first step, in order for preparation for brick earth is unsoiling. It involves scraping off top layer, about 150-250mm deep.
2. Why is the process of weathering performed?
a) To remove organic matter
b) To prepare for next process
c) To improve plasticity
d) To dry clay
Explanation: Weathering is a process of softening dug out clay by adding little water and then exposing it to the atmosphere. Then it is heated and left for few weeks to undergo weathering.
3. The process of kneading brick earth is called:
Explanation: Pugging or tempering is done by adding water to brick earth and kneading until a homogenous mass and required plasticity is attained.
4. Which one of the following is not a part of pug mill?
a) Vertical shaft
c) Cutting blades
d) Timber base
Explanation: Hub is a part of Kaplan turbine. Pub mill is where pugging is carried out. It consists of a conical iron tub, cutting blades, vertical shaft, horizontal arm, long wooden arm and timber base.
5. How many methods of moulding brick earth are there?
Explanation: There are two methods of carrying out moulding of brick earth. These are hand moulding and machine moulding.
6. The meaning of slop moulded bricks is:
a) Sand sprinkled inside mould
b) Insufficiently moulded bricks
c) Brittle and slimy bricks
d) Mould dipped in water
Explanation: To avoid clay from sticking on the mould, either sand is sprinkled (sand moulded bricks) or mould is dipped in water (slop moulded bricks).
7. Plastic clay method of machine moulding results in pressed bricks.
Explanation: In plastic clay method, clay in the plastic state is employed. It comes out of a rectangular opening in the form of a clay bar. As it comes out, it is cut into to strips by wire, and hence called wire bricks. Pressed bricks are obtained from dry clay method.
8. Which is the most commonly employed drying method in India?
a) Hot floor drier
b) Tunnel drier
c) Natural drying
d) Blow drying
Explanation: Natural drying employs workers and it is more economical in India than using artificial driers. Hot floor drier and tunnel drier are types of artificial drying method.
9. Which of the following is not a chemical change that takes place in the brick earth during burning?
Explanation: During burning, no reduction reaction takes place. Dehydration expels most of the water. Oxidation results in the elimination of carbon and sulphur as oxides. Vitrification is extreme reaction and occurs when heating above 900oc.
10. The depression provided in the face of a brick during its manufacturing is called:
Explanation: Frog is the depression provided in the face of the brick. It forms a key of mortar, reduces the weight of the brick, provides the place for companies to put their trade mark.
Sanfoundry Global Education & Learning Series – Basic Civil Engineering.
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