Question

Q. Which one of the following statements describes 'Odometer'?

• A.
  It is an instrument used to measure a ship's speed relative to the water.
• B.
  An instrument used to measure distance travelled by moving vehicle
• C.
  It is an instrument to measure length of arbitrary curved lines.
• D.
  It is a device used to locate objects underwater.

Answer 1

The correct option is B

An instrument used to measure distance travelled by moving vehicle
Explanation:

Option (a) is incorrect: Pitometer logs (also known as pit logs) are devices used to measure a ship's speed relative to the water.

Option (b) is correct: An odometer or odograph is an instrument used for measuring the distance traveled by a vehicle, such as a bicycle or car. The device may be electronic, mechanical, or a combination of the two (electromechanical).

Option (c) is incorrect: An opisometer, also called a curvimeter, meilograph, or map measurer, is an instrument for measuring the lengths of arbitrary curved lines.

Option (d) is incorrect: Sonar is a device for finding objects underwater using sound waves. Sonars transmit ultrasonic waves into the water below and receive the returning echoes from the seabed.