BRPL Interview Questions and Answers

Electrical energy is the energy derived from electric potential energy or kinetic energy of charged particles.

• Electrical energy is the energy that is associated with the flow of electric charge.

• It can be converted into other forms of energy such as mechanical, thermal, or light energy.

• Examples include the energy used to power electrical devices like light bulbs, refrigerators, and computers.

An electronic device is a device that operates using electronic circuits and components to perform various functions.

• Operates using electronic circuits and components

• Performs various functions

• Examples: smartphones, laptops, tablets, TVs, digital cameras

Resistance is the opposition to the flow of electric current in a material.

• Resistance is measured in ohms (Ω).

• It is caused by collisions between electrons and atoms in a material.

• Materials with high resistance are insulators, while those with low resistance are conductors.

• Resistance can be calculated using Ohm's Law: R = V/I, where R is resistance, V is voltage, and I is current.

Copper is the best conductor due to its high conductivity and affordability.

• Copper is the most commonly used conductor in electrical wiring

• It has high electrical conductivity, second only to silver

• Copper is also relatively affordable compared to other high conductivity metals like silver or gold

Types of AC motors include induction motors, synchronous motors, and brushed and brushless DC motors.

• Induction motors: most commonly used type, simple design, reliable, low cost

• Synchronous motors: maintain constant speed, used in applications requiring precise speed control

• Brushed DC motors: use brushes to conduct current, simple design, lower cost

• Brushless DC motors: no brushes, more efficient, longer lifespan, higher...read more

An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.

• Induction motors are commonly used in various applications such as industrial machinery, pumps, fans, and compressors.

• They do not require any physical connection between the rotor and the stator, making them more reliable and maintenance-free.

• The speed of an induction motor is determined by the frequency of the AC...read more

Advantages of synchronous motor include high efficiency, power factor correction, and constant speed.

• High efficiency: Synchronous motors operate at a higher efficiency compared to induction motors, making them ideal for applications where energy savings are important.

• Power factor correction: Synchronous motors help improve the power factor of the system, leading to reduced electricity costs and better utilization of el...read more

Iron ore pellets are small spherical balls of iron ore used in the production of steel.

• Iron ore pellets are created by agglomerating fine iron ore concentrate in a balling drum or disc.

• They are typically around 6-16 mm in size and have a high iron content.

• Iron ore pellets are used as raw material in blast furnaces for the production of steel.