Electrician and Technician Interview Questions and Answers

The SI unit for battery is the volt (V).

• The SI unit for battery is the volt (V).

• The volt is a measure of electric potential difference.

• It represents the amount of electrical energy per unit charge.

• For example, a typical AA battery has a voltage of 1.5 volts.

The current SI unit is the ampere (A).

• The SI unit for electric current is the ampere (A).

• The ampere is defined as the amount of electric charge that flows through a conductor in one second when a current of one ampere is applied.

• The symbol for ampere is A.

• The ampere is named after the French physicist André-Marie Ampère.

The capacitor unit is a measure of capacitance, which is the ability of a capacitor to store electrical energy.

• Capacitor unit is measured in farads (F).

• It represents the amount of charge a capacitor can store per unit voltage.

• Common capacitor units include microfarads (μF), nanofarads (nF), and picofarads (pF).

The resistance unit is the ohm (Ω), which measures the opposition to the flow of electric current.

• The resistance unit is named after the German physicist Georg Simon Ohm.

• It is represented by the symbol Ω.

• Resistance is measured using an ohmmeter.

• Common examples of resistance units include kilohm (kΩ) and megohm (MΩ).

A DOL starter line diagram is a schematic representation of a direct online starter used to control an AC motor.

• DOL starter is used to start and stop AC motors

• It consists of a contactor, overload relay, and start/stop push buttons

• The line diagram shows the connections between these components

• The overload relay protects the motor from overcurrent

• The start/stop push buttons control the on/off function of the motor

A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Consists of primary and secondary coils

• Changes voltage levels (step-up or step-down)

• Used in power distribution, electronics, and appliances

There are various types of motors including AC motors, DC motors, synchronous motors, asynchronous motors, and stepper motors.

• AC motors: commonly used in household appliances and industrial applications

• DC motors: used in applications where speed control is important

• Synchronous motors: maintain a constant speed and are used in applications like clocks and timers

• Asynchronous motors: also known as induction motors, commonly used in industrial applications

• Stepper motors: used in ...read more

False

• The answer to the question is false.

• The statement is not true.

• The full name is not relevant to the question.