Essential Electric Mechanic Interview Preparation Guide

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Depending on the type of job you are interviewing for (industrial, residential or commercial), you might be asked why you are interested in that aspect of the field and not others. Be prepared to explain why you are seeking the particular type of position the interview is for.

(1). The main advantage of using the star delta starter is reduction of current during the starting of the motor.Starting current is reduced to 3-4 times Of current of Direct online starting.
(2). Hence the starting current is reduced , the voltage drops during the starting of motor in systems are reduced.

If the voltage between the two phase is equal to the lamp voltage then the lamp will glow. When the voltage difference is big it will damage the lamp and when the difference is smaller the lamp will glow depending on the type of lamp.

AVR is an abbreviation for Automatic Voltage Regulator. It is important part in Synchronous Generators, it controls theoutput voltage of the generator by controlling its excitation current. Thus it can control the output Reactive Power of the Generator.

The water is obtained in the boiler and the coal is burnt so that steam is obtained this steam is allowed to hit the turbine , the turbine which is coupled with the generator generates the electricity.

If you are new to the electrical trade or are applying for an apprenticeship, you will probably be asked this question. Employers ask this question because they want to hear about your motivations and goals so that can be sure that you really have an interest in the field.

MCB is miniature circuit breaker which is thermal operated and use for short circuit protection in small current rating circuit. MCCB moulded case circuit breaker and is thermal operated for over load current and magnetic operation for instant trip in short circuit condition.under voltage and under frequency may be inbuilt. Normally it is used where normal current is more than 100A.

Mainly transformer has high inductance and low resistance.In case of DC supply there is no inductance ,only resistance will act in the electrical circuit. So high electrical current will flow through primary side of the transformer.So for this reason coil and insulation will burn out.

Be prepared to quote a realistic salary expectation for the position that you are applying for. Use your knowledge about the profession and the company to make a request that meets your needs while also being reasonable.

Employers will want to know if you have the right skills and credentials to work as a professional electrician. Mention any relevant certifications, licenses and education, as well as any experience from previous jobs that specifically pertain to an electrician's job.

It is the property of a cable by virtue of it can withstand the applied voltage without rupturing it is known as insulation level of the cable.

I received extensive on-the-job training in my first position right out of university. I had a powerful mentor who allowed me to work by his side every day for six months. The most valuable lesson I learned during this on the job training was the blueprint and schematic reading and analysis.

Interviewers sometimes ask about what might seem like very basic knowledge to weed out people who lack the foundational knowledge necessary to succeed in the job. Be prepared to explain key concepts relevant to the work of an electrician to demonstrate that you have an understanding of the work and what it involves. If you happen to get asked a question that you don't know the answer to, you still might be fine if you can explain to the interviewer how you would approach finding the answer if faced with a need to know the information in the field.

Interviewers who ask this question want to get a sense of your thoughts on how people you have worked with in the past view you as a team member. Be prepared to list and describe a few of your key traits from the perspective of someone who has spent time working side-by-side with you. Include items specific to your job capabilities as well as your approach to work, such as whether you are a team player or prefer working independently and if you are hard-working, loyal and tenacious when it comes to solving problems.

Advantages:
☛ 1. Fast Switching Characterstics than Mosfet, BJT, IGBT
☛ 2. Low cost
☛ 3. Higher Accurate.

The role of Feedback in control system is to take the sampled output back to the input and compare output signal with input signal for error ( deviation from the desired result).
Negative Feedback results in the better stability of the system and rejects any disturbance signals and is less sensitive to the parameter variations. Hence in control systems negative feedback is considered.

Reverse Power flow relay are used in generating stations's protection. A generating stations is supposed to fed power to the grid and in case generating units are off,there is no generation in the plant then plant may take power from grid. To stop the flow of power from grid to generator we use reverse power relay.

The Feedback in Control System in one in which the output is sampled and proportional signal is fed back to the input for automatic correction of the error ( any change in desired output) for futher processing to get back the desired output.

When breaker is close at one time by close push button,the anti pumping contactor prevent re close the breaker by close push button after if it already close.

Generally capacitor gives infinite resistance to dc components(i.e., block the dc components). it allows the ac components to pass through.

The goal of asking this type of question is to see if you have a clear understanding of what it takes to work successfully as an electrician. In addition to listing the skills, give examples that illustrate you possess them and apply them in your work.

ACSR means Aluminium conductor steel reinforced, this conductor is used in transmission & distribution.

The effect of armature flu to main flux is called armature reaction. The armature flux may support main flux or opposes main flux.

Near distribution transformers and out going feeders of 11kv and incomming feeder of 33kv and near power transformers in sub-stations.

I am great with troubleshooting. Since a large part of my work is to handle and fix problems with electronic equipment, this skills comes in handy at a great level.