Process Control and Instrumentation
Which of the following can measure temperatures in the range of - 20 to 300°C ?

None of these
Resistance thermometer
Mercury in glass thermometer
Vapor pressure thermometer

ANSWER DOWNLOAD EXAMIANS APP

Process Control and Instrumentation
Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by

Reducing the volume of the capillary to a minimum
Reducing the volume of the receiving element to a minimum
All of these
Making the volume of thermometer bulb as large as conveniently possible

ANSWER DOWNLOAD EXAMIANS APP

Process Control and Instrumentation
Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by

Using steel tube in place of glass tube
Filling nitrogen under pressure in the stem
Accounting for the tube expansion
Increasing the diameter of the tube

ANSWER DOWNLOAD EXAMIANS APP