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

Share your answers in the comments box, for authentic rule and regulation of shipping Industry visit DG Shipping website. #cocexam #eto

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Questions and Answers for Electro Technical Officer(ETO) Exam

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

A. In the case when a lamp has reached the last of its useful life, it should be replaced immediately, or the resulting flashing may _____

1. Explode, causing the glass to fly in all directions

2. damage the starter and the ballast

3. blown the lamp's circuit breaker

4. short-circuit the ballast transformer

B. In relation to the load type, in what type of AC circuit will the current always lead the voltage?

1. Resistive

2. Inductive

3. Capacitive

4. Resistive and capacitive

C. When 65-ohm resistor is connected to a 3 V battery. What will be the power dissipation of the resistor is ____.

1. 0.2 W

2. 200 W

3. 2 W

4. 0.002 W

D. When the power factor is leading in the circuits, which of the following can be used?

1. Shunt Capacitor

2. Neither Shunt capacitor does not shunt reactor

3. shunt reactor

4. Either Shunt capacitor does not shunt reactor

E. When the current through the coil of an electromagnet is reversed, the directions of the magnetic field is also reversed.

1. True

2. False

3. None of above

F. The opposition to the magnetic lines of force in a magnetic flux is called _____. 

1. Reluctance

2. Inducatnce

3. Resistance

4. Impedence

G. The winding resistance of a coil can be increased by ____ the number of turns or by using a _____ wire.

1. decreasing, thicker

2. decreasing, thinner

3. increasing, thicker

4. increasing, thinner

H. When an AC motor is started and produces 25 horsepower, the KW meter reading will be ____.

1. 25.65 KW

2. 37.65 KW

3. 18.65 KW

4. 30.65 KW

I. Which of the following statements is false about the cleanliness of electric motors?

1. Dirt, oil, grease, and moisture are primary reasons for the deterioration of insulation of the stator windings of a motor.

2. Dry compressed ait at a high pressure can drive in dirt inside windings instead of removing them.

3. The cleanliness of the external body of a totally enclosed motor is important since the body helps to dissipate heat generated.

4. High pressure dry compressed air cleaning is preferred over suction cleaning for stator winding.

J. Which of the following statements best describes the material known as varnished cambric?

1. Cotton cloth coated with insulating varnish

2. Paper with minerals oil, specially wrapped with nonmetallic tape and coated with varnish.

3. Felted asbestos sealed with varnish

4. Rubber insulation coated with a layer of tin.

Answers:

A. damage the starter and the ballast

B. Capacitive

C. 0.2 W

D. Shunt capacitor

E. True

F. Reluctance

G. Increasing, thinner

H. 18.65 KW

I. High pressure dry compressed air cleaning is preferred over suction cleaning for stator winding.

J. Cotton cloth coated with insulating varnish

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This will Get you Closer to excellence

When we fail to achieve our goal but someone other achieves that same goal then you ever notice where I missed?

Have you ever seen someone successful or famous and thought I can do better than them.  So what’s the difference between you and them?

Why is it that they are out there achieving their goal while you’re not able to, see people underestimate the value of volume.  The potential behind how many doors are you ready to knock on. How many tweets are you willing to send?

How many people are you willing to ask for help and ask for their guidance and steer. We hardly achieve anything the first time we try. The people that have made it’s on their 10^th, 20th, 100^th and sometimes thousands of more attempts. So don’t underestimate the power of volume. Don’t underestimate what’s possible when you go out there and speak to everyone that you know. 

#motivation #livelife #imaginationhunt #liveviar

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Happy International Women's Day

I am the Light

I am the Beauty

I am the Glory

I am the Silence

I am the Passionate

I am the Strongest

I am the Unconditional love

I am the Root

I am the Pride

I am the power

I am the Greatest of God's creation

I am a Woman

HAPPY WOMEN'S DAY

Celebrated to honor the Women in You

#Her #CreatorforChange

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Questions and Answers for Electro Technical Officer(ETO) Exam

Multiple choice Questions and answer for ETO COC (Certificate for Competency) exam.

1. The 80W bulb is connected in series with a heater. If the 80W bulb is replaced by a 50W bulb, the heater output will ____.

a) Decrease

b) Increase

c) Show no changes

d) None of the above

2) Find out the color code for a 220 ohm, 5% resistor?

a) Orange, Orange, Black, Gold

b) Red, Red, Brown, Silver

c) Red, Red, Brown, Gold

d) Red, Red, Black, Gold

3) The AC circuits possess characteristics of capacitance, resistance and Inductance. The capacitive reactance of a circuit is expressed in  _____.

a) Mhos

b) Farads

c) Ohms

d) Henry

4) The circuit which is in series. Which value will remain unchanged at all places in the circuit?

a) Current

b) Inductance

c) Voltage

d) Resistance

5) What is the measuring unit of Inductance is ________.

a) Ohm

b) Celsius

c) Henry

d) Farad

6. What produces current in semiconductor?

a) Neutrons

b) Holes

c) Electrons and Holes

d) Protons

7. The Induced voltage across a stationary conductor in a steady magnetic field is zero.

a) True

b) False

c) Infinite

8. A 3 phase 440V AC motor is started and produces 50 HP when running at its rated speed with rated load. How much will the KW meter reading increase for a single generator providing power?

a) 18.65

b) 37.38

c) 25.65

d) 50

9. Choose best method for cleaning dust and foreign particles from low power equipment while limiting damage to their electric components?

a) Blowing a high-velocity stream of compressed air rapidly across the component.

b) Using carbon tetrachloride as a cleaning solvent to clean the components.

c) Carefully wipe off the components with a soft cotton rag

d) Using a vacuum cleaner to remove debris from the components.

10. What are the precautions should be taken when cleaning the windings of a motor with compressed air?

a) Ensure that the circuit breaker is opened and tagged on the feeder panel.

b) Open the machine on both ends so as to allow the air and dust to escape.

c) Ensure that the air is clean and as dry as possible.

d) All of the above

Answer:

1. Decrease

2. Red, Red, Brown, Gold

3. Ohms

4. Current

5. Henry

6. Electrons and Holes

7. True

8. 37.38

9. Using a vacuum cleaner to remove debris from the components.

10. All of the above

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