Carrier Technologies Interview Questions and Answers

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Types of steel include carbon steel, alloy steel, and stainless steel. Iron has a melting point of 1538 degrees Celsius.

• Carbon steel is made up of iron and carbon, with low tensile strength but high ductility.

• Alloy steel contains elements like nickel, chromium, and molybdenum to enhance properties like strength and corrosion resistance.

• Stainless steel is a type of alloy steel with high corrosion resistance due to the presence of chromium.

• Iron has a melting point of 1538 degre...read more

Substation components include transformers, circuit breakers, busbars, and switchgear. SLD stands for Single Line Diagram.

• Components of a substation include transformers, circuit breakers, busbars, and switchgear.

• Single Line Diagram (SLD) is a simplified representation of a power system showing the main components and their connections.

• Transformers are used to step up or step down voltage levels.

• Circuit breakers are used to interrupt the flow of electricity in case of a fault...read more

A vacuum circuit breaker (VCB) is an electrical switch designed to interrupt an electrical circuit by creating a vacuum inside the interrupter tube.

• VCBs use a vacuum as the arc quenching medium to extinguish the arc when the contacts open.

• They are commonly used in medium voltage applications for their high reliability and fast interruption speed.

• VCBs are maintenance-free and have a longer lifespan compared to other types of circuit breakers.

• Example: Siemens 3AH4 vacuum circui...read more

Equipments used in blast furnaces include stoves, hot blast valves, tuyeres, bustle pipes, and skip hoists.

• Stoves - used to preheat the air blast before it enters the furnace

• Hot blast valves - control the flow of hot air into the furnace

• Tuyeres - nozzles through which the hot air is injected into the furnace

• Bustle pipes - distribute the hot air evenly throughout the furnace

• Skip hoists - used to transport materials in and out of the furnace

Blast furnace operation involves the process of smelting iron ore to produce iron.

• Blast furnace is a large structure used to extract iron from iron ore.

• The process involves heating iron ore with coke and limestone in a continuous flow of hot air.

• The intense heat melts the iron ore, separating the impurities and producing molten iron.

• The molten iron is then tapped from the bottom of the furnace and further processed for various applications.

• Blast furnace operation requires car...read more

A gearbox is a mechanical device that transmits power from an engine to the wheels.

• It is used to change the speed and torque of a vehicle.

• It contains gears, shafts, and bearings.

• It can be manual or automatic.

• Examples include a car's transmission or a bike's gear system.