BEC_Workshop

Digital multi-meter is used for

• a. measuring ac and dc current, voltage and resistance

• b. measuring ac current and voltage

• c. measuring dc current and resistance

• d. measuring ac voltage and resistance

Which of the following is a passive device

• a. Transistor

• b. Rectifier

• c. Capacitor

• d. Vacuum tube

If alternating current is applied to the anode of a diode, what would you expect to see at the cathode?

• a. No signal

• b. Steady direct current

• c. Pulsating direct current

• d. Pulsating alternating current

In a DSO, the waveform is stored in

• a. Compressed form

• b. Analog form

• c. Digital form

• d. Mixed form

Which semi-conductor device glows red, yellow, or green, depending upon its chemical composition?

• a. A light-emitting diode

• b. A fluorescent bulb

• c. A zener diode

• d. A vacuum diode

The clipping of the sinewave observed in DSO happens

• a. If you set the volts/div too low

• b. If you set the sec/div too low

• c. If you set volts/div too high

• d. If you set sec/div too high

What tools are needed to solder circuit boards ?

• a. Screwdriver, heat tape, soldering iron

• b. Soldering iron, solder, flux

• c. Pliers, soldering iron, magnet

• d. Soldering iron, adhesive, pipe cleaners

Identify the correct statement for the component given:

• a. The cathode lead is longer. It goes to the negative rail

• b. The cathode lead is shorter. It goes to the negative rail

• c. The cathode lead is longer. It goes to the positive rail

• d. The cathode lead is shorter. It goes to the positive rail.

The ripple factor of a power supply is a measure of

• a. Its filter efficiency

• b. Its voltage regulation

• c. Diode rating

• d. Purity of power output

Forward bias voltage of a Germanium diode is :

• a. 0.7 V

• b. 0.05 V

• c. 0.3 V

• d. 1 V