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_______________?

Related Mcqs:

1. Non-metallic diaphragm used as pressure sensor in instruments is generally made of__________________?

   A. Teflon
   B. Synthetic rubber
   C. Bakelite
   D. Thick paper

2. A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in_______________?

   A. Light intensity
   B. Current
   C. Flux density
   D. Voltage

3. The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly__________________?

   A. Linear
   B. Non-linear
   C. Parabolic
   D. Hyperbolic

4. 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

5. 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

6. Temperature measuring instruments are standardised mostly with _____________ points of pure substances?

   A. Melting
   B. Boiling
   C. Both A. & B.
   D. Neither A. nor B.

7. Which of the following flow-metering instruments is an areameter ?

   A. Venturimeter
   B. Rotameter
   C. Pitot tube
   D. Hot wire anemometer

8. 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

9. 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.

10. 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