Science GK Practice Question and Answer
8 Q: Which of the following hitting methods has the highest power factor?
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5ef417b67c1ec61320b5a6c6- 1heating resistancetrue
- 2induction heatingfalse
- 3Arc heatingfalse
- 4Dielectric heatingfalse
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Answer : 1. "heating resistance"
Explanation :
The correct answer is Resistance Heating. Resistance heating is based on the I2R effect and is highly resistive in nature that's why it has the maximum power factor. Electric resistance heating is defined as “the heat produced by passing an electric current through a material that preferably has high resistance”.
Q: An aquatic plant was introduced to the US to remove pollution in Indian aquatic bodies as a troublesome weed. what is its name?
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5f6046a209624c19c5c13610- 1hawthornfalse
- 2Egiolpstrue
- 3hyacinthfalse
- 4Pistiafalse
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Answer : 2. "Egiolps"
Explanation :
So the correct answer is 'Eichhornia crassipes' An aquatic plant introduced from America to check pollution turned out to be a troublesome weed in Indian water bodies.
Q: From which source is the list of countries emitting carbon dioxide based on carbon dioxide emissions?
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5f60443d80a26b7dab000d1c- 1Burning of fossil fuelsfalse
- 2Cement Industryfalse
- 3Both of the abovetrue
- 4None of thesefalse
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Answer : 3. "Both of the above"
Explanation :
This is a list of sovereign states and territories by carbon dioxide emissions due to certain forms of human activity, based on the EDGAR database created by European Commission and Netherlands Environmental Assessment Agency.
Q: Whose register is the montrix record?
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5f60427d2eed863f3a805bfb- 1Dangerous foreign speciesfalse
- 2endangered wild speciesfalse
- 3Aquatic places at risk under anthropogenic activitiestrue
- 4None of thesefalse
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Answer : 3. "Aquatic places at risk under anthropogenic activities"
Explanation :
The Montreux Record is a register of wetland sites on the List of Wetlands of International Importance where changes in ecological character have occurred, are occurring, or are likely to occur as a result of technological developments, pollution or other human interference. It is maintained as part of the Ramsar List.
Q: Which of the following disease reduces the age of laborers working in coal mine and that disease is called Black Lung disease?
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5f6042c22eed863f3a805d2e- 1Clomgolanosistrue
- 2progressive massive fibrosisfalse
- 3mesotheliomafalse
- 4None of thesefalse
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Answer : 1. "Clomgolanosis"
Explanation :
Coal workers' pneumoconiosis (CWP), commonly known as "black lung disease," occurs when coal dust is inhaled. Over time, continued exposure to the coal dust causes scarring in the lungs, impairing your ability to breathe. Considered an occupational lung disease, it is most common among coal miners.
Q: Which government has launched 'Mo Sarkar' campaign?
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5f6041cc80a26b7dab0005f1- 1West Bengalfalse
- 2Tripurafalse
- 3Nagalandfalse
- 4Odishatrue
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Answer : 4. "Odisha"
Explanation :
Odisha Chief Minister Naveen Patnaik has launched the 'Mo Sarkar' program. This program promotes Gandhian thinking. Also, encourages people to raise their voice for their rights. 'Mo Sarkar' aims to improve governance by collecting feedback on the behavior and professionalism displayed by government officials. This program has been started in 21 district headquarters, hospitals and medical colleges of Cuttack, Sambalpur and Berhampur.
Q: Electricity is generated when the drivers rotate between the magnetic fields?
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5ef44b332d6fc772f50b9337- 1Movingtrue
- 2stablefalse
- 3Both static and dynamicfalse
- 4None of thesefalse
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Answer : 1. "Moving"
Explanation :
In a generator, a rotating magnetic field is used to produce electrical energy. When a conductor, such as a wire, moves through a magnetic field, a voltage is induced across the conductor. This is known as electromagnetic induction, and it is the fundamental principle behind how generators work.
Q: What is the coupling of primary and secondary coils in a transformer?
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5ef4495d2d6fc772f50b8ceb- 1Electricalfalse
- 2Mechanicalfalse
- 3Magnetictrue
- 4All thesefalse
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Answer : 3. "Magnetic"
Explanation :
The secondary coil is also generating a magnetic field that is growing and shrinking just like the field in the primary coil. This coupling of magnetic energy between these two coils is called mutual induction.