Question

Aneroid word in Aneroid barometer means
(a). Wet
(b). Moist
(c). Dry
(d). Overflowing

Answer 1

Hint: A barometer is an instrument to measure pressure. The name of the barometer is derived from the fluid it contains. An Android barometer does not contain any fluid. Aneroid barometer consists of a cell or series of cells of metallic box

Complete step-by-step answer:

A barometer is the instrument used to measure surrounding air pressure. There are different types of barometer available. For example, Water based barometer, mercury barometer, Vacuum oil barometer, Aneroid barometer etc.

Aneroid barometer:

Aneroid barometer consists of a cell or series of cells of metallic box with vacuum inside it. The cell boundaries are very flexible and they can bulge outward or shrink inward depending upon the external pressure. If external pressure is large it exerts a more force and walls of cells shrink inwards and if external pressure is low then force exerted by external atmosphere will be less so walls of cells bulge outwards. Depending upon the amount of this inward or outward we can determine external pressure using a pointer fixed inside. No liquid is used in this type of barometer hence it is called dry barometer. The Aneroid term in the aneroid barometer refers to dry.
Aneroid barometers are also used to determine weather condition and height determination as pressure changes with height.
Hence option (c) is correct.

Note: To understand the terminology of names you have to understand the construction of barometers. For example water oil barometer consist of water and oil inside it hence it is termed as water oil barometer. Similarly Aneroid barometer does not contain any fluid and Aneroid in the name refers to absence of liquid.