71. Emission spectroscopy is used for
72. Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an
73. Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
74. Pick out the first order system from among the following.
75. Non-metallic diaphragm used as pressure sensor in instruments is generally made of
76. __________ thermometer can not measure sub-zero (< 0° C) temperature,
77. Which of the following can not measure a temperature of 1600°C ?
78. Which of the following thermocouples can measure the maximum temperature?
79. A barometer measures the __________ pressure.
80. A mercury barometer measures the __________ pressure.
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