Basic Science Practice Question and Answer
8 Q: Which of the following hitting methods has the highest power factor?
2588 05ef417b67c1ec61320b5a6c6
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: Who propounded the term ecology?
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5f60521e09624c19c5c14b7d- 1Charles Darwinfalse
- 2Robert Whitakerfalse
- 3Arthur Tansleyfalse
- 4Ernest Hackletrue
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Answer : 4. "Ernest Hackle"
Q: The first Indian Satellite Aryabhatta was launched in
2442 05f4cbaf5081699374e8068be
5f4cbaf5081699374e8068be- 11974false
- 21975true
- 31976false
- 41977false
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Answer : 2. "1975"
Explanation :
The Aryabhata spacecraft, named after the famous Indian astronomer, was India's first satellite; it was completely designed and fabricated in India and launched by a Soviet Kosmos-3M rocket from Kapustin Yar on April 19, 1975.
Q: Tungsten resistance to temperature rise?
2424 05ef41568bea49d16b47d39a1
5ef41568bea49d16b47d39a1- 1decreasesfalse
- 2increasestrue
- 3there is no changefalse
- 4All thesefalse
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Answer : 2. "increases"
Explanation :
At high temperatures, the tungsten filament gets hot and atoms in the filament vibrate more. The electrons in the current now collide more with the atoms & more energy is needed to push the current through the filament. Hence, the resistance of tungsten increases with temperature.
Q: Which of the gas is not known as green house gas?
2307 05edef8a5d1536a09d5745f35
5edef8a5d1536a09d5745f35- 1Methanefalse
- 2Hydrogentrue
- 3Nitrous oxidefalse
- 4Carbon dioxidefalse
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Answer : 2. "Hydrogen"
Explanation :
Whereas oxygen, nitrogen, and argon are not examples of greenhouse gases.
Q: Most commonly used motor in motor generator sets of high capacity?
2293 05ef417197c1ec61320b5a64d
5ef417197c1ec61320b5a64d- 1Cage Model Induction Motorfalse
- 2synchronous motortrue
- 3DC Compounder Motorfalse
- 4None of the abovefalse
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Answer : 2. "synchronous motor"
Explanation :
The tendency nowadays is to use synduction or synchronous motors. The synduction motor resembles an induction motor but runs at synchronous speed.
Q: Why put a wooden handle in the kettle?
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5fc9cf7dcac441723c82be24- 1because of fashionfalse
- 2Wood is a bad conductor of heat and the handle is not hottrue
- 3is lightfalse
- 4None of thesefalse
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Answer : 2. "Wood is a bad conductor of heat and the handle is not hot"
Q: Bleaching powder contains ______ bleaching agent.
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5f87ed3ce6aa3e1d0bcb7463- 1Brominefalse
- 2Iodinefalse
- 3Hydrogenfalse
- 4Chlorinetrue
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