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CBSE · Class 10 · Social Science

Manufacturing Industries

Standard difficulty · 20 questions · 40 marks

Name: Date: Score: ____ / 40

Write full answers in Sections B and C. Answers are on the last page — try every question first!

Section A — Choose the correct answer8 × 1 = 8 marks
1.
Manufacturing belongs to the:
  1. tertiary sector
  2. quaternary sector
  3. primary sector
  4. secondary sector
2.
Which of these is an agro-based industry?
  1. woollen textiles
  2. petrochemicals
  3. machine tools
  4. copper smelting
3.
Which of these is in the public sector?
  1. coir industry in Kerala
  2. sugar mills in Maharashtra
  3. SAIL
  4. TISCO
4.
Suppose a factory uses 200 units of electricity a month and cuts it by 45% to reduce pollution. How many units does it save?
  1. 200 units
  2. 110 units
  3. 90 units
  4. 900 units
5.
In 1904, the first cement plant opened in Chennai. How many years before 2008 was that?
  1. 94 years
  2. 104 years
  3. 105 years
  4. 114 years
6.
Iron ore, coking coal and limestone are used in the ratio 4 : 2 : 1. Out of 16,800 tonnes of raw material, how much is coking coal?
  1. 4,900 tonnes
  2. 5,600 tonnes
  3. 2,400 tonnes
  4. 4,800 tonnes
7.
About 2 tonnes of alumina make 1 tonne of aluminium. How much alumina is needed for 20 tonnes of aluminium?
  1. 80 tonnes
  2. 20 tonnes
  3. 40 tonnes
  4. 120 tonnes
8.
Each litre of industrial waste water pollutes about 8 litres of fresh water. How much is polluted by 600 litres a day?
  1. 4,800 litres
  2. 5,400 litres
  3. 608 litres
  4. 4,200 litres
Section B — Short answer8 × 2 = 16 marks
9.
What is manufacturing?
10.
Agro-based or mineral-based? (a) tea (b) jute
11.
What kind of ownership is each? (a) sugar mills in Maharashtra (b) Dabur Industries
12.
What causes (a) noise pollution (b) air pollution?
13.
It takes 4–6 tonnes of bauxite to make 2 tonnes of alumina, which make 1 tonne of aluminium. How much bauxite and alumina are needed for 15 tonnes of aluminium?
14.
A steel plant uses 11,900 tonnes of raw material in the ratio iron ore : coking coal : limestone = 4 : 2 : 1. How much of each?
15.
Which came first, and by how many years? (a) TISCO opened its steel plant at Jamshedpur (1907) (b) the first jute mill opened at Rishra (1855)
16.
A factory releases 2,500 litres of waste water a day. If each litre pollutes 8 litres of fresh water, how much is polluted in 19 days, and how can this be prevented?
Section C — Longer answers4 × 4 = 16 marks
17.
Why did the cotton textile industry first grow in Maharashtra and Gujarat?
18.
Match each with its ownership: (a) sugar mills in Maharashtra (b) Dabur Industries (c) SAIL. Choose from: private sector; public sector; cooperative sector.
19.
(a) A steel plant uses 9,100 tonnes of raw material in the ratio 4 : 2 : 1 (iron ore : coking coal : limestone). How much iron ore? (b) Why is iron and steel a basic industry? (c) Why are many steel plants on the Chhotanagpur plateau?
20.
Explain noise pollution and water pollution caused by industries, and suggest one way to control each.
AmbifulWorksheets
Practice that never repeats
CBSE · Class 10 · Social Science

Answer key

Manufacturing Industries · AW-10SS-MFI-2026-V1 · For parents — fold back or tear off before handing the sheet to your child.

QAnswerWorking
1(d) secondary sector—
2(a) woollen textiles—
3(c) SAIL—
4(c) 90 units45% of 200
5(b) 104 years2008 − 1904
6(d) 4,800 tonnes16,800 ÷ 7 × 2
7(c) 40 tonnes20 × 2
8(a) 4,800 litres600 × 8
9Producing goods in large quantities by turning raw materials into more valuable products.—
10(a) agro-based (b) agro-based—
11(a) cooperative sector (b) private sector—
12(a) machines, generators and drills (b) sulphur dioxide and smoke from factories—
1360–90 tonnes of bauxite and 30 tonnes of alumina15 × 4 to 15 × 6; 15 × 2
14iron ore 6,800, coking coal 3,400, limestone 1,700 tonnes11,900 ÷ 7 = 1,700 per part
15The first jute mill opened at Rishra, by 52 years1907 − 1855
16380,000 litres; by treating effluents before release and recycling water.2,500 × 8 × 19
17Raw cotton, a large market, ports, transport, labour and a moist climate were all available there.—
18(a) cooperative sector (b) private sector (c) public sector—
19(a) 5,200 tonnes (b) All other industries depend on it for machinery and materials. (c) Cheap iron ore and raw materials nearby, cheap labour and a home market.9,100 ÷ 7 × 4
20Noise pollution: machines, generators and drills; water pollution: effluents from paper, chemical and dyeing units. Controls such as filters and cleaner fuels, effluent treatment, cooling ponds or silencers.—