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Question Detail
Which instrument is used to measure altitudes in aircraft's ?
- Audiometer
- Ammeter
- Altimeter
- Anemometer
Answer: Option C
Explanation:
Ammeter - Measures strength of electric current.
Audiometer - Measures intensity of sound.
Anemometer - Measures force and velocity of wind and directions.
1. Which instrument is used to measure pressure of gases ?
- Manometer
- Machmeter
- Magnetometer
- Micrometer
Answer: Option A
Explanation:
Machmeter - is used to determine the speed of an aircraft in terms of speed of sound,
Magnetometer - is used to compare magnetic movements and fields,
Micrometer - is used to convert sound waves into electrical vibrations.
2. Which instrument is used to measure heat radiation ?
- Radar
- Salinometer
- Refractometer
- Radio micrometer
Answer: Option D
Explanation:
Radar - is used to detect the direction and speed of an object by means of radiowaves,
Salinometer - is used to determine salinity of solutions,
Refractometer - is used to measure refractive indices.
3. The incident ray, reflected ray and normal to the reflecting surface at the incident point all never lie in same plane.
- True
- False
Answer: Option B
4. Siphon will fail to work if
- both its limbs are of unequal length
- the temperature of the liquids in the two vessels are the same
- the level of the liquid in the two vessels are at the same height
- the densities of the liquid in the two vessels are equal
Answer: Option C
5. The nuclear reaction in which a heavy nucleus splits into two nuclei of nearly equal mass is called
- Nuclear fusion
- Nuclear fission
- Nuclear reaction
- Fast breeding
Answer: Option B
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