Biplane

The most popular type of wing its swept wing(стреловидное). That is, when we look at the wing from above it is located at an angle to the vertical axis of the aircraft.The main advantage of a wing is its high lift coefficient.

Also located on the wing flaps , slats, and spoilers are used to control the lifting power and usually produced during takeoff and landing.

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What is a Fuse:

The fuse is an electronic device, which is used to protect circuits from over current, overload and make sure the protection of the circuit.

Fuse consists of a low resistance metallic wire enclosed in a non combustible material. Whenever a short circuit, over current or mismatched load connection occurs, then the thin wire inside the fuse melts because of the heat generated by the heavy current flowing through it. Therefore, it disconnects the power supply from the connected system.

Types :

Cartridge fuses

Cartridge fuses are used to protect electrical appliances such as motors air-conditions, refrigerator, pumps etc, where high voltage rating and currents required.

Blade Type fuses:

This type of fuses (also known as spade or plug-in fuses) comes in plastic body and two metal caps to fit in the socket. Mostly, they used in automobiles for wiring and short circuit protection.

Resettable Fuses:

Resettable fuse is a device, which can be used as multiple times without replacing it. They open the circuit, when an over current event occurs and after some specific time they connect the circuit again.

Билет 23

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Side cutters are type of pliers used for cutting, twisting or pulling wires.

Screwdriver is a tool used to tighten or loosen screws.

Long nose pliers are pliers with long blades able to grip or cut through wires.

Measuring tape is a tool with long piece of thin metal, paper or plastic with numbers on it.

Wire stripper is a tool used foe pulling the covering off wires.

Diagonal cutter are pliers that are only used for cutting wire and do not grip.

Utility knife is a tool with a thin, sharp slanted blade used to cut things.

1)What is an Grounding System?

The connection between electrical appliances and devices with the earth plate or electrode through a thick wire of low resistance to provide safety is known as or Grounding.

Grounding System in an electrical network work as a safety measure to protect human life as well as equipment, the main objective of the Earthing system is to provide an alternative path for dangerous currents to flow so that accidents due to electric shock and damage to the equipment can be avoided.

Metallic parts of equipment are grounded or connected to the earth and if the equipment insulation fails for any reason, then the high voltages that can be present in the equipment covering or outer box need some path to get discharged. If the equipment is not earthed, these dangerous voltages can be transferred to anyone who touches it resulting in an electric shock.