MM

The reliability of an instrument mean

• The life of the instrument

• The degree of repeatability within specified limits

• The time interval between two responses of the instrument

• None of these

Positive displacement flow meters are …………….flow meters.

• Variable area flow

• Differential pressure flow

• Quantity flow

• None of these

Synchronization in a CRO means

• Continuous monitoring of the trace

• Adjustment of sweep frequency

• Holding a pattern on the screens without creep

• All of above

The materials used in the manufacture of thermistors are

• Oxides of manganese and cobalt

• Oxides of iron and zinc

• Carbides of silicon and germanium

• All of these

In a mechanical system, systematic error is produced by

• Frictional loading

• Inertial loading

• Backlash

• None

By which of the following dynamometers are performance characteristics of pumps and compressors determined?

• Driving dynamometer

• Absorption dynamometer

  c)

• Transmission dynamometer

• None of these

Which among the following statements is correct about LVDT?

• It converts pressure into electrical output

• It converts strain into electrical output

• It converts linear displacement into electrical signal

• All of these

A strain gauge should have a high value of gauge factor

• To reduce hysteresis effects

• To give a linear relation between applied strains and resistance change

• To increase sensitivity

• To reduce or eliminate the effect of variation in ambient temperature

The hot wire anemometer used for measuring gas velocities is a

• Variable inductance transducer

• Variable resistance transducer

• Variable frequency transducer

• Variable capacitance transducer

…………… is measured by a piezometer tube.

• Dynamic pressure of a moving stream

• Undisturbed fluid pressure

• Gauge pressure in static mass of fluid

• Pressure difference between two fluids