Questions

[4 marks Question-Answer]

🎯

Test yourself on this topic

4 questions · timed · auto-graded

Question 14 Marks
State meaning and importance of large scale industries.
Answer
Large scale industries are referred to as those industries that are having huge infrastructure, raw-material, high manpower requirement and large capital investment. Those organisation having a fixed asset of more than ₹ 10 crore are considered to be large scale industries. Iron and steel industry, textile industry, manufacture of heavy machinery, ship building are some examples of large scale industries.
Large scale industries are vital for the development of any country. A country's economic success is determined by the growth, development and functioning of the large scale industries.
The basic characteristics of large scale industries are below :
(i) Huge quantities of raw materials are used. They may be obtained from the nearby areas within the country or may come from distant places outside the country.
(ii) A very large number of labourers, often more than a thousand, are employed in the big factories.
(iii) Skilled, trained and efficient labour is required. Managerial staff, required for organisation, administration and marketing, is employed in large numbers.
(iv) Capital investment is high involving more than a crore of rupees.
(v) Work is highly mechanised in large scale industries. Heavy power operated machines in large numbers are involved in every operation from manufacturing to packaging. Power consumption is, therefore, very high in the large scale industries.
(vi) Mass production of high quality finished products requires proper marketing. The markets are located both within and outside the country.
(vii) As the manufactured products are in large quantities and are often heavy and bulky, good transportation network is required for sending them to the markets.
All developed countries of the world like USA, UK and other West European countries owe their economic success to large scale industries. Post-Independent, India saw a rapid growth in the development of large scale industries. Basic as well as heavy industries like iron and steel, aluminium and consumer industries like cotton textiles, paper etc. belong to this category.
View full question & answer
Question 24 Marks
Explain various methods of disposal of waste.###What is segregation of waste? What are the various categories of waste based on it?
Answer

Image
Image
Image
Image
(iv) Drainage
Removal of surface or subsurface water from a given area by natural or artificial means is called drainage.
The waste management system in industrial areas and towns also includes a proper drainage system. In these areas, proper drainage system helps :
(i) to prevent flooding during monsoon,
(ii) to maintain a clean and hygienic environment, and
(iii) to collect the wastewater for proper treatment.
There are two system of drainage :
(a) Waste-water drainage : The waste-water drainage system becomes operative by laying drainage pipes that carry waste-water from drains connected to toilets, bathrooms, washrooms, etc., to the treatment plant (for effluent treatment). It is a closed pipe system accessible through manholes.
(b) Storm-water drainage : The storm-water drainage system consists of such underground pipelines that carry rainwater or storm-water to rivers, lakes or wetlands. Inlets to these pipes are located near the industries, residential places, roadsides, etc.
(v) Treatment of Effluents
Effluents can be biologically detoxified if they have little or no heavy metals. Following are the steps for treatment of effluents before discharge.
  • Primary discharge : Sludge, the solid content of the sewage, is removed in this treatment. Sludge can be removed either by filtration or by settling the sludge by sinking it in large holding tanks. The sludge removed by the primary treatment may be digested, sterlised or otherwise treated and if free of heavy metals or other toxic content, may be safely used as a soil conditioner and fertiliser or other use.
  • Secondary treatment : The clear effluent undergoes aeration in secondary treatment. The liquid phase may be aerated in daylight in large storage tanks, or it may be trickled or sprayed over banks open to air and daylight. A further 90% reduction of pathogen occurs, giving now 99% total reduction in infectivity.
    Following the primary treatment, the biological oxygen demand is now greatly reduced and the transparency to natural UV light penetration is much enhanced. If now placed into the sea, a further reduction of organisms will come about.
  • Tertiary treatment : The liquid phase is passed through the clear quartz tube which is exposed to intense ultraviolet light. This treatment will totally destroy all known pathogens as the liquid phase effluents is now fully transparent and well oxygenated. This effluent can be employed to provide safe discharge to bathing waters and shellfish areas. Tertiary treatment may also involve chemically stripping off the phosphate and nitrate levels found in the outfall.

View full question & answer
Question 34 Marks
Define small scale industry. Give three reasons why small scale industries should be encouraged in India?
Answer
(a) A small scale industry is one in which fixed investment is upto ₹ 5 crore.
(b) Three Reasons : SSIs need to be promoted because of the following reasons :
(i) Small industries are labour intensive. Hence, they are capable of absorbing surplus labour in productive employment.
(ii) They help in reducing the regional disparities as these can be started anywhere (in villages or towns) all over the country.
(iii) These industries can be started even by middle income groups.
View full question & answer
Question 44 Marks
Give reasons why the development of industry is regarded essential for economic development in India.
Answer
(i) As a result of industrialisation, the levels of national income and per capita income in the country increase.
(ii) Setting up of new industrial units provide job opportunities for unemployed persons.
(iii) Development of agro-based industries like tea, jute, cotton textile, sugar etc. provide ready market for agricultural products.
(iv) Industries provide farm machines and tools required by agriculture.
View full question & answer
[4 marks Question-Answer] - Economics STD 9 Questions - Vidyadip