Mica is mainly used in :
- A.food and beverage industry.
- B.iron and steel industry.
- C.aluminium industry.
- D.electrical and electronic industries.
Correct answer
Explanation
The correct answer is D, electrical and electronic industries.. Mica is an excellent electrical insulator that withstands high voltage and heat, so it is used mainly in the electrical and electronic industries.
Mica is made of thin plates or leaves that split easily into very thin, transparent or coloured sheets. It has high dielectric strength, low power loss and resists heat, which makes it ideal for capacitors, insulating washers, heating elements and other electrical and electronic parts. In India, mica deposits are found in the Koderma-Gaya-Hazaribagh belt of Jharkhand, around Nellore in Andhra Pradesh and near Ajmer in Rajasthan.
A is wrong because mica is not a raw material for food or drinks.
B is wrong because the iron and steel industry needs iron ore, coking coal, limestone and manganese, not mica.
C is wrong because the aluminium industry depends on bauxite and cheap electricity.
Exam tip: mica = insulator for the electrical industry; main belt: Koderma (Jharkhand), with Nellore (Andhra Pradesh) and Ajmer (Rajasthan).
Practice Questions
View allWhich one of the following is applicable to collision-coalescence process of precipitation?
- A.Clouds which do not extend beyond the freezing level
- B.Clouds which extend beyond the freezing level
- C.All types of clouds
- D.Cirrocumulus cloud
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Collision-coalescence is the way rain forms in warm clouds, whose tops stay below the level where water freezes. In such clouds all droplets are liquid.
Read the full explanation →Identify the type of drainage pattern on the basis of the given characteristics :
1. It represents the most common pattern of streams and their tributaries
2. It occurs in areas of uniform rock type and regular slope
3. A map, or aerial photograph, shows a pattern like the veins on a leaf— smaller streams join the main stream at an acute angle
Select the correct answer.
- A.Dendritic
- B.Radial
- C.Trellis
- D.Centripetal
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A pattern that looks like the branches of a tree or the veins of a leaf, formed on uniform rock with a regular slope, is dendritic.
Read the full explanation →The Research Design and Standards Organization is the R&D wing of which one of the following organizations ?
- A.Bhabha Atomic Research Centre
- B.Indian Space Research Organization
- C.Indian Railways
- D.Defence Research and Development Organization
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The Research Design and Standards Organisation (RDSO) is the sole research and development wing of the Ministry of Railways. RDSO is headquartered at Lucknow.
Read the full explanation →Which one of the following Indian States has recorded negative growth population as per Census 2011?
- A.Manipur
- B.Mizoram
- C.Tripura
- D.Nagaland
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Nagaland was the only Indian state whose population fell between 2001 and 2011; its decadal growth rate in Census 2011 was about −0.6 per cent.
Read the full explanation →Piecing together the puzzle of geologic time to create and analyze historical maps of the Earth is known as
- A.paleoclimatology
- B.paleogeomorphology
- C.paleolithology
- D.paleogeography
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Paleogeography is the study of the Earth's geography in the geological past, and its main product is a set of maps showing where continents, oceans, mountains and shorelines lay at different times.
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