(b) Plane meter
(c) Altimeter
(d) Hydrometer
Ans: (c)
229. The device through which the intensity of the sunrays is measured: [RRB
GG 2003]
(a) Astrometer
(b) Chrescograph
(c) Barometer
(d) Actiometer
Ans: (d)
230. Solar radiation is measured by :
(a) Pyrometer
(b) Astrometer
(c) Barometer
(d) Manometer
Ans: (a)
231. The device through which the depth of the sea is measured by the use of
sound wave: [SSC Grad 2003]
(a) Radar
(b) Sonar
(c) Altimeter
(d) Venturimeter
Ans: (b)
232. The use of thermostat is : [MPPCS (Pre) 2004]
(a) to measure temperature
(b) to increase temperature
(c) to keep constant temperature
(d) to convert temperature into electricity
Ans: (c)
233. The radiator of vehicles are used for:
(a) to heat the engine
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