Two identical rectangular strips, one of copper and the other of steel, are riveted as shown to form a bi-metal strip. On heating, the bi-metal strip will
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  • bend with steel on the concave side
  • get twisted
  • remain straight
  • bend with steel on the convex side
Four cylindrical rods of different radii and lengths are used to connect two heat reservoirs at fixed temperatures t1 and t2 respectively. From the following pick out the rod which will conduct the maximum quantity of heat:
  • Radius 1 cm, length 2 m
  • Radius 1 cm, length 1 m
  • Radius 2 cm, length 4 m
  • Radius 3 cm, length 8 m
The temperature for which the reading on Celsius and Fahrenheit scales are identical is
  • -273°C, -273 °F
  • -30°C, -30 °F
  • 0 °C, 0 °F
  • -40 °C, -40 °F
A steel tape is calibrated at 20° C. A piece of wood is being measured by steel tape at 10°C and reading is 30 cm on the tape. The real length of the wood is:
  • Equal to 30 cm
  • more than 30 cm
  • cannot be predicted
  • less than 30 cm
Which phase of matter has maximum value of temperature coefficient of cubical expansion?
  • Gaseous
  • Solid
  • Liquid
The coefficient of liner expansion of a cubical crystal along three mutually perpendicular direction is and . What is the coefficient of cubical expansion of crystal?
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  • A
  • B
  • C
  • D
Relationship for converting the Fahrenheit and Celsius scales is
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  • A
  • B
  • C
  • D
When water is heated from 0° C to 20° C its volume:
  • first decreases and then increases
  • goes on increasing
  • remains constant up to 15°C and then increases
  • goes on decreasing
The relation between coefficient of volume expansion and coefficient of linear expansion is
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  • A
  • B
  • C
  • D
Water contract on heating between the temperatures
  • 0°C to 4°C
  • 0°K to 4°K
  • 0 K to 273 K
  • 0°F to 4°F
0 h : 0 m : 1 s

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