Electro Technical Officer(ETO) Exam Questions and Answers

Questions and answers for Electro technical officer - ETO. Multiple choice Questions and answer for ETO COC (Certificate for Competency) exam.

1. State one of the following statements is true concerning a ploy phase synchronous motor?

a. Resistance is gradually added to the rotor circuit.

b. The field winding is energized for starting purpose only

c. The motor is started as an induction motor.

d. The starting current is held below the rated current.

2. Which of the following procedures should be used to maintain a large electric current during periods of inactivity?

a. Blow compressed air over areas where dust is deposited.

b. Use space heaters to prevent to remove carbon dust.

c. Apply a thin layer of air dying varnish on the windings

d. Spray a solvent periodically to remove carbon dust.

3. The part of a fuse that melts and opens the circuits is made of _______.

a. Zinc or an alloy of tin and lead

b. Aluminum or beryllium alloy

c. Copper and antimony

d. Steel

4. Which of the following statements concerning analog and digital devices are correct?

a. There is no basic difference between the two systems.

b. Operations in a digital device are performed simultaneously.

c. The variable in the digital system is fixed quantities

d. Analog devices are superior in accuracy when compared to digital devices.

5. If a digital multimeter is used to test a silicon diode what is the status if the display reads 5 ohms when the diode is forward biased and reads 500 ohms when reversed biased?

a. The diode is functioning properly

b. The diode is intermittently open

c. The diode is open

d. The diode is shorted

6. Silicon diodes designed for a specific reverse breakdown voltage are most often used as electronic power supply voltage regulators, are especially known as _______.

a. Zener diodes

b. Compensating diodes

c. Hot- carrier diodes

d. Tunnel diodes

7. Which of the following statements comparing transistors and vacuum tubes is correct?

a. A vacuum tube must have a heated cathode, whereas transistor does not.

b. The anode of both transistors and vacuum tubes must be heated to give off electrons

c. Both transistor and vacuum tubes have a cathode that must be heated to give off electrons.

d. Neither transistor nor vacuum tubes require heat for electrons to flow.

8. AC voltameter is generally calibrated to read the ______.

a. Average voltage

b. Peak voltage

c. Instantaneous voltage

d. RMS voltage

9. Often a common-collector will be the last before the load. The main function of this stage is to ______.

a. Buffer the voltage amplifiers from the low- resistance load.

b. Provide a high-frequency path to improve the frequency response

c. Provide voltage gain

d. Provide phase inversion.

10. Battery failure in an analog type multimeter can be checked by?

a. Measuring the resistance of a known resistor

b. Measuring the line voltage

c. The pointer failing to reach zero ohms with the probe tips connected together and adjusting the resistance range trimmer

d. None of the above

Answer:

1. The motor is started as an induction motor.

2. Use space heaters to prevent to remove carbon dust.

3. Zinc or an alloy of tin and lead

4. The variable in the digital system is fixed quantities

5. The diode is functioning properly

6. Zener diodes

7. A vacuum tube must have a heated cathode, whereas transistor does not.

8. RMS voltage

9. Buffer the voltage amplifiers from the low- resistance load.

10. The pointer failing to reach zero ohms with the probe tips connected together and adjusting the resistance range trimmer

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