Quest Global Interview Questions and Answers

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

• Transformers are used to increase or decrease the voltage in electrical power transmission and distribution systems.

• They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.

• The primary winding receives electrical energy from the input circuit and produces a magnetic field.

• This magnetic...read more

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

• Resistance is measured in ohms (Ω).

• It is caused by factors such as the material of the conductor, its length, and its cross-sectional area.

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

• Higher resistance leads to lower current flow.

• Examples of resistors include light bulbs, heating elements, and electrical wires.

SMT process involves surface mounting components onto a PCB. Reflow profile is a temperature/time curve used to solder components onto the board.

• SMT process involves placing components onto a PCB using solder paste.

• Reflow soldering is a common method used in SMT where components are soldered by heating the solder paste to a liquid state.

• Reflow profile is a temperature/time curve that dictates the heating and cooling process during reflow soldering.

• To take a reflow profile in ...read more

A capacitor is an electronic component that stores and releases electrical energy.

• A capacitor consists of two conductive plates separated by an insulating material called a dielectric.

• When a voltage is applied across the plates, one plate accumulates positive charge while the other accumulates negative charge.

• Capacitors are commonly used in electronic circuits for various purposes such as energy storage, filtering, and coupling.

• They can store electrical energy and release it ...read more

A diode is an electronic component that allows current to flow in only one direction.

• Diodes are made of semiconductor materials such as silicon or germanium.

• They have two terminals - an anode and a cathode.

• When a voltage is applied across the diode, current flows in one direction only.

• Diodes are commonly used in rectifiers, voltage regulators, and signal limiters.

• They can also be used in circuits to protect against reverse voltage and voltage spikes.

OEE stands for Overall Equipment Effectiveness, a measure of how well a manufacturing process is performing. Cycle time is the total time it takes to complete one cycle of a process.

• OEE is calculated by multiplying Availability, Performance, and Quality percentages.

• Cycle time includes both processing time and any delays or interruptions in the process.

• For example, if a machine has an OEE of 85%, it means it is operating at 85% of its maximum potential efficiency.

• Cycle time ca...read more