The instrument which automatically encodes the message typed on the keyboard and vice versa is
A) Telegraph machine
B) Electronic typewriter C) Teleprinter D) Printer

The base of a bi-polar junction transistor is

A) Lightly doped C) Heavily doped B) both of the above. D) None

A piece of silicon or germanium at 0˚C will act as
A) An insulator
C) A conductor B) A semiconductor D) A superconductor

What is PSW with respect to the 8085 microprocessor?
A) Accumulator and temporary register byte
C) Flag byte B) Accumulator and the flag byte D) Accumulator contents

Which type of amplifier has output voltage equal to the average of all input voltages?
a) Inverting averaging amplifier
b) Non-inverting averaging amplifier c) Non-inverting summing amplifier d) Inverting scaling amplifier

Expression for output voltage of non-inverting summing amplifier with five input voltage?
a) Vo = 5×( Va + Vb+ Vc+ Vd+ Ve)
b) Vo = [1+( Rf/R1)]× ( Va + Vb+ Vc+ Vd+ Ve) c) Vo = Va + Vb+ Vc+ Vd+ Ve d) Vo = ( Va + Vb+ Vc+ Vd+ Ve) /5

Find the type of amplifier that cannot be constructed in differential configuration?
a) Summing amplifier
b) Scaling amplifier c) Averaging amplifier d) Subtractor

Calculate the output voltage, when a voltage of 12mv is applied to the non-inverting terminal and 7mv is applied to inverting terminal of a subtractor.
a) 19mv
b) 5mv c) 1.7mv d) 8.4mv

Strain gage is an example of which device?
a) Transducer
b) Voltage follower c) Integrator d) Differentiator

An instrumentation system does not include
a) Transducer
b) Instrumentation amplifier c) Automatic process controller d) Tester

Transmission line are used for
a) Output signal
b) Input signal c) Signal transfer d) All of the mentioned

What is the line connecting the positive and negative peaks of the carrier waveform called?
a) Peak line
b) Maximum amplitude ceiling c) Modulation index d) Envelope

What is the reference line for the modulating signal?
a) Zero line
b) Carrier peak line c) Modulated peak line d) Un-modulated peak line

What happens when the amplitude of the modulating signal is greater than the amplitude of the carrier?
a) Decay
b) Distortion c) Amplification d) Attenuation

What is the effect of distortion?
a) Total information loss
b) Error information c) Attenuated information d) Amplified information

What is the circuit used for producing AM called?
a) Modulator
b) Transmitter c) Receiver d) Duplexer

The ratio between the modulating signal voltage and the carrier voltage is called?
a) Amplitude modulation
b) Modulation frequency c) Modulation index d) Ratio of modulation

What is the wave of frequency that occurs at the sum and difference of the carrier and modulating signal is called?
a) Noise signals
b) Sideband c) Extraband d) Neutral band

What type of display will give us clear information on the signal if it is made up of different frequencies?
a) Frequency domain display
b) Amplitude domain display c) Time domain display d) Bandwidth display

What happens if a satellite is launched vertically and released at its design altitude?
a) Continue to orbit the earth
b) Fall back c) Overshoots the altitude and moves at a constant speed d) Stays where it was released

The satellite is accelerating as it orbits the earth.
a) True
b) False