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Q: Which of the following is the instrument used in submarines to view objects above sea level ?
  • A. Odometer
  • B. Pyrheliometer
  • C. Hypsometer
  • D. Periscope
Correct Answer: Option D - Periscope is an optical instrument. It is used in submarine the officer used it to see the target. Thus in submarines, an instrument called periscope is used to see objects above the sea level. Pyrheliometer- Sun radiation measuring instrument. Hypsometer- Boiling point of water measuring instrument.
D. Periscope is an optical instrument. It is used in submarine the officer used it to see the target. Thus in submarines, an instrument called periscope is used to see objects above the sea level. Pyrheliometer- Sun radiation measuring instrument. Hypsometer- Boiling point of water measuring instrument.

Explanations:

Periscope is an optical instrument. It is used in submarine the officer used it to see the target. Thus in submarines, an instrument called periscope is used to see objects above the sea level. Pyrheliometer- Sun radiation measuring instrument. Hypsometer- Boiling point of water measuring instrument.