General Science Practice Question and Answer
8 Q: Most commonly used motor in motor generator sets of high capacity?
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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: 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: What is the unit of power of the lens in SI method?
1704 060b4be357cb636175d3d222d
60b4be357cb636175d3d222d- 1Wattsfalse
- 2Opterfalse
- 3diopterstrue
- 4Newtonfalse
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Answer : 3. "diopters"
Q: Which one of the following is not a vector amount?
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60b4bf367cb636175d3d273b- 1velocityfalse
- 2momentumfalse
- 3masstrue
- 4angular velocityfalse
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Answer : 3. "mass"
Q: In the following is not an example of refraction of light.
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5ee86b3581b3dd0cad84b919- 1Twinkling effect of starsfalse
- 2Miragesfalse
- 3Bending of light while passing through a mediumfalse
- 4lateral inversiontrue
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Answer : 4. "lateral inversion"
Q: A high speed vehicle honks, so its pitch?
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5f912fafd6785c0fc0d91299- 1is heard as muchfalse
- 2more audibletrue
- 3hearing impairedfalse
- 4First less and then morefalse
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Answer : 2. "more audible"
Q: Ice is packed in sawdust because___
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5f0fe439c06d532785e20384- 1Sawdust does not stick to the icefalse
- 2Sawdust will not get melt easilyfalse
- 3Sawdust is a good conductor of heatfalse
- 4Sawdust is a poor conductor of heattrue
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Answer : 4. "Sawdust is a poor conductor of heat"
Q: The gases used in different types of welding would include
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5edef9548c4c964f73d37d62- 1oxygen and hydrogenfalse
- 2oxygen, hydrogen, acetylene and nitrogenfalse
- 3oxygen, acetylene and argonfalse
- 4oxygen and acetylenetrue
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Answer : 4. "oxygen and acetylene"
Explanation :
Acetylene is the only fuel gas suitable for gas welding because of its favourable flame characteristics of both high temperature and high propagation rates. Other fuel gases, such as propane, propylene or natural gas, produce insufficient heat input for welding but are used for cutting, torch brazing and soldering.