Spencer's Retail Maintenance Electrician Interview Questions and Answers

There are several types of circuit breakers used in electrical systems.

• Thermal circuit breakers: use a bimetallic strip to detect and respond to excessive heat

• Magnetic circuit breakers: use a solenoid to detect and respond to high currents

• Ground fault circuit interrupters (GFCIs): detect imbalances in electrical currents to prevent electric shocks

• Arc fault circuit interrupters (AFCIs): detect dangerous electrical arcs ...read more

Miniature Circuit Breakers (MCBs) are types of circuit breakers used in electrical systems to protect against overcurrents.

• MCBs are commonly used in residential, commercial, and industrial applications.

• They are available in different current ratings, such as 6A, 10A, 16A, 20A, etc.

• MCBs can be single-pole, double-pole, or triple-pole, depending on the number of phases they can handle.

• Some common types of MCBs include B-...read more

AC supply is alternating current that changes direction periodically, while DC supply is direct current that flows in one direction constantly.

• AC supply changes direction periodically, while DC supply flows in one direction constantly

• AC supply is commonly used in household appliances, while DC supply is used in electronics like computers and phones

• AC supply is generated by power plants and transmitted over long distanc