Top 15 expected MCQ iti insturctor Wireman/Electrician

1➤ What is the PIV of the diode if the AC input voltage is 24V?

34V33 V35 V32 V

2➤ How many terminals are in transistor?

4325

3➤ What is the application of zener diode?

Rectifier Oscillation Voltage regulator Amplification

4➤ What is the expansion of PIV? A : Peak Input Voltage B : Positive Inverse Voltage C : Peak Inverse Voltage D : Phase Inverse Voltage

Peak input voltage Peak inverse voltage Positive inverse voltage Phase inverse Voltage

5➤ How the N type semi conductor is formed? A : Germanium with aluminium B : Silicon with antimony C : Silicon with iridium D : Silicon with arsenic

Silicon with antimonySilicon with iridiumSilicon with arsenicGermanium with aluminium

6➤ What does the depletion region behave?

InsulatorSemi conductor ResistorConductor

7➤ What is the use of LED?

To reduce the rippleTo rectify AC to DCTo indicate lightTo regulate the voltage

8➤ What is the function of forward biased PN junction diode?

Act as limit switchAct as uni directional switchAct as control switchAct as bi directional switch

9➤ Why earth resistance value required to keep very low?

For low power consumptionFor low voltage dropFor easy measurementFor quick current flow

10➤ What will happen to the value of earth resistance, if length of the earth pipe is increased?

Remain sameInfinity Decreases Increases

11➤ What is the shape of the waveform of A/C?

Square waveSawtooh waveSine wavePulsating wave

12➤ Which type of capacitor is known as polarised capacitor?

Electrolytic capacitor Ceramic capacitor Mica capacitor Paper capacitor

13➤ Which force is required to demagnetise the residual magnetism in the hysteresis loop?

Counter induced emf Electromotive forceMagneto motive force Coercive force

14➤ Which rule is used to find the direction of the self induced emf in a coil?

Lenz law Corkscrew ruleClock ruleAmpere rule

15➤ What is the metal composition of Permalloy?

Iron and chromiumIron and aluminiumIron and copperIron and nickel

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