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

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

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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

32) The output of a logic gate is '1' when all its inputs are '0'. Then the gate is either

A NAND or an EX-OR gate

A NOR or an EX-NOR gate

An OR or an EX-NOR Gate

An AND or an EX-OR Gate

Answer is:

A NOR or an EX-NOR gate

33) Lime mortar is generally made with

Quick lime

Fat lime

Hydraulic lime

White lime

Answer is:

Hydraulic lime

34) In a situation where torsion is dominant, which one of the following is the desirable section?

Angle Section

Channel Section

I-Section

Box-Type Section

Answer is:

Box-Type Section

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

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30) A tunnel diode is

A very heavily doped p-n junction diode

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

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

31) Which is NOT correct for oscillators

Signals may be Half Sine wave

32) The output of a logic gate is '1' when all its inputs are '0'. Then the gate is either

A NOR or an EX-NOR gate

33) Lime mortar is generally made with

Hydraulic lime

34) In a situation where torsion is dominant, which one of the following is the desirable section?

Box-Type Section

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