Multiple Choice Questions in Electronics Engineering Part 8

Multiple Choice Questions in Electronics Engineering Part 8

20.  How many voltage are available from two-phase, three wire alternator?

A.    One

B.     Three

C.     Two

D.    Four

21.  At what frequency does the RC circuit of an amplifier reduce the voltage gain to 70.7 percent of its midrange value?

A.    Resonant

B.     Cutoff

C.    Critical

D.    Natural

22.  What is the operating temperature of class A motor under motor classification?

A.    105°C

B.     130°C

C.     155°C

D.    180°C

23.  What particular motor class in which the operating temperature is 180°C? 

A.    Class H

B.     Class F

C.     Class A

D.    Class B

24.  What are the basic components of a harmonic drive used in robot transmission system?

A.    Wave generator

B.     Flexspline

C.     Circular spline

D.    All of the choices

25.  What is the operating temperature of class B motor?

A.    200°C

B.     155°C

C.    130°C

D.    180°C

26.  What is the width of the pulse radiated by a fire control tracking radar?

A.    Very thick

B.     Narrow

C.     Thick

D.    Very narrow

27.  If the operating temperature is 155°C then it falls under what motor classification?

A.    Class F

B.     Class B

C.     Class H

D.    Class A

28.  How much percent is stray losses in dc machines?

A.    1%

B.     2%

C.     5%

D.    10%

29.  What are considered standard minimum distance between components on a chip?

A.    4 and 5 µm

B.     5 and 10 µm

C.    2 and 3 µm

D.    1 and 2µm

30.  For an advanced chip, the minimum distance between components is

A.    1 µm

B.     2 µm

C.     3 µm

D.    4 µm

31.  What are used to apply or remove power and to select a function or a circuit within a device?

A.    Switch

B.     Relay

C.    Circuit control devices

D.    Breaker

32.  What do you call a register on the CPU used for the temporary storage of data during arithmetic or logic operations?

A.    Flip-flop

B.     Accumulator

C.     Memory

D.    RAM

33.  What parameter specifies the value of voltage from cathode to cathode at which the SCR breaks into the avalanches region and begins to conduct heavily as in the pn junction diode?

A.    Forward-breakover voltage

B.     Reverse-breakover voltage

C.     Break-over voltage

D.    Stop-over voltage

34.  What type of servo system based on the same principle of error-signal generation where velocity is sensed, and the load is moving at the desired velocity?

A.    Velocity servo

B.     Rate servo

C.     Speed servo

D.    Controlled servo

35.  What is the term for the switch that disconnects the circuit completely at one position before the connection of the next position made?

A.    Break-before-make

B.     Make-before-break

C.     Break-before-break

D.    Make-before-make

36.  What is the identifying feature of a colpitts oscillator?

A.    Split inductor

B.     Split resistor

C.     Split transformer

D.    Split capacitor

37.  What instrument is used to measure the amount of active ingredients in the electrolyte of a battery?

A.    Hygrometer

B.     Voltmeter

C.     Electrometer

D.    Hydrometer

38.  What is the typical frequency range about the center frequency of a tunable magnetron?

A.    ± 5%

B.     ± 2%

C.     ± 4%

D.    ± 6%

39.  What is a gaseous tube that uses a poll of liquid mercury at its cathode?

A.    Thyratron

B.     Phanotron

C.     Klystron

D.    Ignitron