Wireman 2nd year mcq

Wireman – Semester 3 Module 1 – Electronic Components

1 : What is the name of maximum reverse voltage the diode can with stand?
A : Knee voltage
B : Barrier voltage
C : Peak inverse voltage
D : Cut in voltage

2 : What is the barrier potential for silicon diode?
A : 0.9V
B : 0.3V
C : 0.7V
D : 0.6V

3 : Identify the component symbol represents?

A : Diode
B : Diac
C : LED
D : Zener diode

4 : What is the application of zener diode?
A : Voltage regulator
B : Rectifier
C : Amplification
D : Oscillation

5 : How many terminals are in transistor?
A : 2
B : 3
C : 4
D : 5

6 : Which is the current amplification factor in common base configuration?
A : Alpha (α)
B : Beta (ꞵ)
C : Gamma (ɤ)
D : Delta (∆)

7 : Which region emitter and collector junctions are reverse biased?
A : Safuration region
B : Cut off region
C : Active region
D : Breakdown region

8 : How many semi conducting layers are present in SCR?
A : Two
B : Three
C : Four
D : Five

9 : What are the name of the terminals in UJT?
A : Base 1, Base 2, gate
B : Anode, Cathode, gate
C : Base 1, Base 2, Emitter
D : Emitter base, collector

10 : Which current is required to turn ON SCR from OFF state to ON state?
A : Holding current
B : Latching current
C : Reverse blocking current
D : Forward blocking current

11 : Which is the control terminal of SCR?
A : Gate
B : Cathode
C : Anode
D : Base

12 : How many terminals are in fixed voltage regulator IC?
A : 3
B : 4
C : 5
D : 6

13 : How the size of integrated circuits (IC) compared with discrete circuit?
A : Large
B : Small
C : Similar
D : Very large

14 : What does 05 indicates in IC 7805?
A : Positive output current
B : -5V
C : +5V
D : Negative output current

Wireman – Semester 3 Module 1 – Electronic Components

15 : What is the application of 7805 IC?
A : Clipping
B : Clamping
C : Oscillator
D : Voltage regulator

16 : What is the name of component marked as X in voltage regulator?

A : Zener diode
B : Diode
C : Transistor
D : Diac

17 : Which is the high power passive component in D.C. power supply?
A : Transistors
B : Diodes
C : IC
D : Resistors

18 : Which is the second stage of a DC power supply?
A : Voltage transformation
B : Filtering
C : Rectification
D : Input supply