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Tuesday, 3 April 2018

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. What happens when a low voltage protection circuit is used in an electric motor's starter to ______ ?

a. Trip the contactor when the motor develops a short circuit due to low voltage
b. Prevent the motor from restarting automatically in case it stops
c. Trip the main contactor when the motor over speeds due to low voltage
d. Allow the motor to restart automatically on the restoration of voltage without manual resetting.

2. What do mean by discoloration of the rotor bars in a squirrel-cage motor is typical evidence of _____ ?

a. Overheating
b. Vibration

c. Moistured

d. All of the above

3. What is the functional name of an electrical device which prevents simultaneous energizing of loads thereby prventing damage or injury?

a. Electrical interlock device
b. Monitoring device
c. Mechanical limit device
d. All of above

4. If a digital multimeter is set up in the resistance mode to test a capacitor, what would the display read if the capacitor is discharged?

a. The ohmic value would initially read very low, but over time the ohmic value would gradually rise to an extremely high value.
b. The ohmic value would read very high.
c. The ohmic value would read very low.
d. The ohmic value would initially very high, but over time it drops to a low value.

5. When an ohmmeter is used to test a semiconductor diode, you find a low resistance in both the forward and reverse bias direction, this indicates that the diode has a/an ____ ?

a. Short
b. Good capacitive quality
c. Open
d. Good resistive quality

6. Which of the listed conditions is an advantage of a PN diode over a vacuum tube?

a. No warm-up time
b. More robust
c. Longer life
d. All of above


7. When troubleshooting most electronic circuits, the loading effects can be minimized by using a voltameter with a/ an _____ ?

a. I/P impedance that is much less than the impedance of the circuit in the voltage is being measured.
b. The sensitivity of more than 1000 V/ohm
c.  I/P impedance that is much greater than the impedance of the circuit in the voltage is being measured.
d. The sensitivity of less than 1000 V/ohm

8. In a Transistor, _______

a. The emitter, Collector, and Base are the basic elements
b. Emitter separates base and Collector

c. PNP and PNP are one the same basic typed

d. Collector separates Base and Emitter

9. An SCR is a solid state device used for what functional purpose?

a. To function like a switching device and control relatively low load current
b. To function as an amplifier and control relatively high load current
c. To function like a switching device and control relatively high load current
d. To function as an amplifier and control relatively low load current

10. Which of the following statement represents an application of an SCR?

a. It is used to sense the flame in an automated burner.
b. It is used to provide DC power for the main propulsion motor.
c. It is used as a voltage reference diode.
d. It is used to eliminate power supply.




Answers:

1. Prevent the motor from restarting automatically in case it stops
2. Overheating
3. Electrical interlock device
4. The ohmic value would initially read very low, but over time the ohmic value would gradually rise to an extremely high value.
5. Short
6. All of above
7. I/P impedance that is much greater than the impedance of the circuit in the voltage is being measured.
8. The emitter, Collector, and Base are the basic elements
9. To function like a switching device and control relatively high load current
10. It is used to provide DC power for the main propulsion motor.

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