A. Manometer 1. Depth of sea
   B. Audiometer 2. High temperatures
   C. Pyrometer             3. Level of human hearing
   D. Fathometer 4. Pressure of a gas
       A      B      C      D
   (a) 1      4      3      2
   (b) 4      3      1      2
   (c) 4      3      2      1
   (d) 3      4      1      2
Ans: (c)
153. Hot water is poured simultaneously in four metallic tumblers painted
   outside with different paints. After some time the water will be found to have
   cooled most in the tumbler painted.
   (a) rough white
   (b) rough black
   (c) shining white
   (d) shining black
Ans: (b)
154. A car parked in the sun with its windows closed gets terribly hot inside.
   This is due to
   (a) the heat emitted by the engine
   (b) the greenhouse effect
   (c) the good conducting power of the metal body
   (d) the double layered wind shield
Ans: (b)
155. The freezer in a refrigerator is placed near the top
   (a) to keep it away from the hot compressor which is near the bottom
   (b) because of convenience
   (c) so that it can cool the whole interior by setting up convection currents
   (d) to prevent too much cooling
Ans: (c)