Question

Choose the pair that best represents a similar relationship to the one expressed in the original pair of words.

Seismograph : Earthquakes

1. Hygrometer : Torque
2. Viscometer : Elasticity
3. Fathometer : Gravity
4. Udometer : Rain

Answer 1

Correct Answer - Option 4 : Udometer : Rain

Logic:

A seismograph is an instrument is used to detect and record the Earthquakes

Similarly,

A rain gauge also known as an udometer is used to gather and measure the amount of liquid precipitation over an area in a predefined area, period of time.

Hence, the correct answer is "Udometer : Rain".

Instrument	Measures
Hygrometer	Humidity
Viscometer	Viscosity
Fathometer	Depth of Ocean

 

Students often get confused between Hygrometer and Hydrometer.

Hygrometer is used to measure Humidity whereas Hydrometer measures Relative Density.