Aster Hospitals Interview Questions and Answers

Power factor is a measure of how effectively electrical power is being used in a circuit.

• Power factor is the ratio of real power (kW) to apparent power (kVA) in an electrical circuit.

• It indicates how efficiently power is being converted into useful work.

• A power factor of 1 means all the power is being used effectively, while a power factor less than 1 indicates inefficiency.

• Power factor can be improved by using power f...read more

A CT (Current Transformer) is a type of instrument transformer that is used to measure alternating electric currents.

• CTs are used to step down high currents to a lower, more manageable level for measurement or protection purposes

• They work based on the principle of electromagnetic induction

• CTs are commonly used in power distribution systems to monitor and protect electrical equipment

• They are essential for accurate meter...read more

UPS power is a backup power supply system that provides continuous power during outages, while invest refers to putting money into a financial venture for future gain.

• UPS power stands for Uninterruptible Power Supply and is used to provide backup power during outages.

• Investing involves putting money into a financial venture with the expectation of future gain.

• UPS power is critical for maintaining power to essential equ...read more

Circuit breakers protect circuits from overloads and short circuits, while isolators physically disconnect circuits for maintenance or repair.

• Circuit breakers automatically trip when there is an overload or short circuit to protect the circuit.

• Isolators are manually operated switches that physically disconnect a circuit for maintenance or repair.

• Circuit breakers are designed to interrupt current flow during a fault con...read more

A relay is an electrically operated switch that controls a high-power circuit with a low-power signal.

• Relays are used to control circuits by opening or closing contacts when a signal is received

• They are commonly used in industrial applications to control motors, lights, heaters, and other high-power devices

• Relays can be controlled by a variety of input signals, such as voltage, current, or even light

• Examples of relays ...read more

Types of induction motors include single-phase, three-phase, squirrel cage, and wound rotor motors.

• Single-phase induction motors are commonly used in household appliances and small industrial applications.

• Three-phase induction motors are more efficient and are used in larger industrial applications.

• Squirrel cage induction motors have a simple and rugged construction, making them suitable for various applications.

• Wound ...read more