APSC JE Civil Engineering 2021 PYQ with Answers । Part - 2

11 A relatively fixed point of known elevation above datum is called

• [A] Benchmark
• [B] Datum point
• [C] Reduced level
• [D] None of the above

Correct Answer is: [A] Benchmark

12 If the whole circle bearing of a line is 120°, its reduced bearing is

• [A] S30°E
• [B] S60°E
• [C] N30°W
• [D] N60°E

Correct Answer is: [B] S60°E

13 The area of any irregular figure of the plotted map is measured with

• [A] Pentagraph
• [B] Sextant
• [C] Clinometer
• [D] Planimeter

Correct Answer is: [D] Planimeter

14 The magnetic bearing of a line is 48°24′. If the magnetic declination is 5°36′E, the true bearing will be

• [A] 54°
• [B] 44°
• [C] 42°48′
• [D] 45°

Correct Answer is: [A] 54°

15 A primary air pollutant responsible for acid rain is

• [A] Carbon dioxide
• [B] Carbon monoxide
• [C] Sulphur dioxide
• [D] Ozone

Correct Answer is: [C] Sulphur dioxide

16 Eutrophication is

• [A] Caused by accumulation of plant nutrients in water bodies
• [B] A process through which carbon recycles in nature
• [C] An improved water quality status of lakes
• [D] A water purification technique

Correct Answer is: [A] Caused by accumulation of plant nutrients in water bodies

17 Turbidity can be removed by

• [A] Coagulation and filtration
• [B] Aeration and sedimentation
• [C] Activated carbon absorption
• [D] Disinfection

Correct Answer is: [A] Coagulation and filtration

18 The content of total dissolved solids in drinking water shall not be greater than

• [A] 50 mg/litre
• [B] 100 mg/litre
• [C] 500 mg/litre
• [D] 2000 mg/litre

Correct Answer is: [C] 500 mg/litre

19 The pathogens can be killed by

• [A] Nitrification
• [B] Chlorination
• [C] Oxidation
• [D] None of the above

Correct Answer is: [B] Chlorination

20 The pipe which is used to carry the discharge from sanitary fittings like bathrooms is

• [A] Waste pipe
• [B] Soil pipe
• [C] Vent pipe
• [D] Anti-syphonage pipe

Correct Answer is: [B] Soil pipe