10+ QX Global Group Interview Questions and Answers

LT stands for Low Tension, CT stands for Current Transformer, HT stands for High Tension.

• LT - Low Tension refers to electrical systems operating at voltages below 1,000 volts.

• CT - Current Transformer is a type of instrument transformer used to measure alternating current.

• HT - High Tension refers to electrical systems operating at voltages above 1,000 volts.

• Examples: LT cables, CT meters, HT transformers.

Chock, Ignitor, and Capacitor are electrical components used in various applications.

• A chock is an inductor used to limit the flow of current in an electrical circuit.

• An ignitor is a device used to ignite fuel in combustion engines or lamps.

• A capacitor is an electrical component used to store energy in an electric field.

• All three components are commonly used in lighting systems, power supplies, and electronic devices.

KVARH and KVA can be calculated using different formulas based on the type of circuit and load.

• For single-phase circuits, KVA = voltage x current x power factor

• For three-phase circuits, KVA = voltage x current x 1.732 x power factor

• KVARH is calculated by integrating the reactive power over time

• KVARH = (KVAR x hours of operation) / 1000

• KVAR can be calculated using the Pythagorean theorem: KVAR = sqrt(KVA^2 - KW^2)

MIG/MAG welding machine is a type of welding equipment that uses a consumable wire electrode to create an electric arc for welding.

• MIG stands for Metal Inert Gas while MAG stands for Metal Active Gas.

• The machine uses a shielding gas to protect the weld from atmospheric contamination.

• It is commonly used in automotive and manufacturing industries.

• MIG/MAG welding is known for its speed and versatility.

• The machine can be used to weld a variety of metals including steel, aluminum,...read more

Star delta connection is a method of connecting three-phase electrical motors.

• Used to reduce starting current and torque

• Star connection for starting, delta connection for running

• Commonly used in industrial applications

• Requires a special motor starter

• Reduces stress on motor windings

Motor HP can be calculated using the formula: HP = (Torque x RPM) / 5252

• Determine the torque and RPM of the motor

• Use the formula: HP = (Torque x RPM) / 5252

• For example, if a motor has a torque of 50 lb-ft and an RPM of 3,000, the HP would be (50 x 3000) / 5252 = 28.6 HP

Dial starter connection diagrams are used to show the wiring connections for a dial starter.

• The diagrams typically show the power supply connections, control circuit connections, and motor connections.

• The power supply connections include the incoming power and the power going to the motor.

• The control circuit connections include the start and stop buttons, overload protection, and any other control devices.

• The motor connections include the three-phase power connections and the...read more

An air compressor works by converting power into potential energy stored in compressed air.

• Check the oil level and drain the water from the tank before use

• Connect the air hose to the compressor and the tool you want to use

• Turn on the compressor and wait for it to build pressure

• Adjust the pressure regulator to the desired level

• Turn off the compressor and disconnect the air hose when finished

Power factor is the ratio of real power to apparent power in an AC circuit.

• Power factor can be improved by using capacitors or inductors in the circuit.

• A high power factor means more efficient use of electricity.

• Low power factor can result in penalties from utility companies.

• Power factor correction is important in industrial and commercial settings.

• Power factor is measured on a scale of 0 to 1, with 1 being ideal.

TIG welding is a welding process that uses a non-consumable tungsten electrode to produce high-quality welds.

• TIG stands for Tungsten Inert Gas.

• It is also known as Gas Tungsten Arc Welding (GTAW).

• TIG welding uses a shielding gas, typically argon, to protect the weld area from contamination.

• It is commonly used for welding thin sections of stainless steel, aluminum, and other non-ferrous metals.

• TIG welding produces precise and clean welds, making it suitable for applications whe...read more

PCD stands for Pitch Circle Diameter.

• PCD is a measurement used in mechanical engineering to determine the diameter of a circle that passes through the center of all the bolt holes in a bolt pattern.

• It is commonly used in designing and manufacturing wheels, gears, and other mechanical components that require precise alignment and spacing of bolt holes.

• PCD is calculated by measuring the distance between the center of two adjacent bolt holes and multiplying it by a factor depend...read more