A. Teflon
B. Synthetic rubber
C. Bakelite
D. Thick paper
Related Mcqs:
- The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter D. and shape & number of corrugations. Its deflection is proportional to_______________?
A. d
B. d2
C. d3
D. d4 - Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
A. Radiation/infrared pyrometer
B. Filled system thermometer
C. Mercury in glass thermometer
D. Thermo electric pyrometer - Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the ________________?
A. Mercury in glass thermometer
B. Optical pyrometer
C. Iron-constantan thermocouple
D. Alcohol filled thermometer - Temperature measuring instruments are standardised mostly with _____________ points of pure substances?
A. Melting
B. Boiling
C. Both A. & B.
D. Neither A. nor B. - Which of the following flow-metering instruments is an areameter ?
A. Venturimeter
B. Rotameter
C. Pitot tube
D. Hot wire anemometer - Which of the following instruments is not used for measuring sub-zero (<0°) temperatures ?
A. Platinum resistance thermometer
B. Mercury in glass thermometer
C. Vapor pressure thermometer
D. Radiation pyrometer - 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__________________?
A. Making the volume of thermometer bulb as large as conveniently possible
B. Reducing the volume of the capillary to a minimum
C. Reducing the volume of the receiving element to a minimum
D. All A , B & C. - The pressure sensing element of elastic type pressure gauge is never made in the form of a_________________?
A. Bellow
B. Diaphragm
C. Strip
D. Bourdon tube - Thermistors are made of__________________?
A. Ultra pure metals
B. Metal oxides
C. Iron-copper alloys
D. Nickel-chromium alloys - Stalagmometer is used for the measurement of__________________?
A. Kinematic viscosity
B. Surface tension
C. Refractive index
D. Optical activity
