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RRB JE Mechanical 2014
27

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

27) Potentiometer is basically a

Measuring instrument

Integrating instrument

Calibrating instrument

Indicating instrument

Answer is:

Calibrating instrument

Explanation:

A potentiometer is an instrument for measuring voltage by comparison of an unknown voltage with a known reference voltage.
The unknown voltage may be supplied by a standard cell or any other known voltage.
The potentiometer is extensively used for calibrations of voltmeter and ammeters and has, in fact, become the standard for the calibration of these instruments.

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

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Related RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

28) An element whose atoms have three valance electrons, the examples of such elements is

Silicon

Copper

Germanium

Aluminium

Answer is:

Aluminium

29) a NOR gate is called Universal Logic Gate because

It can be used without need of any other gate type

It can be used only with AND gate universally

It can be used only with OR gate universally

It can be used only with NOT gate universally

Answer is:

It can be used without need of any other gate type

30) A tunnel diode is

High resistivity p-n junction diode

A slow switching device

An amplifying device

A very heavily doped p-n junction diode

Answer is:

A very heavily doped p-n junction diode

31) Which is NOT correct for oscillators

Signals may be sine wave

Signals may be Square wave

Signals may be Half Sine wave

Signals broadcast by radio transmitters are example of oscillator signals

Answer is:

Signals may be Half Sine wave

RRB JE Mechanical Question Paper 2014 (Set-1) with Answer Key

For more MCQ's Click Here