Electrical Tools-NSQF Automobile level 2, Session 3

ELECTRICAL TOOLS

Electrical tools:-

                            "Electrical tools are service tools they are used to measure electric current,                                                                         voltage and resistance."

     These tools are operated with battery or power. 

Source:allumiax.medium.com

Importance of electrical tools:

    It helps mechanic to check and measuring the current, voltage of electrical component etc. 

Common electrical tools used are multi meter, ammeter, volt meter etc. Many electrical measuring tools are available in the workshop and same can be seen and discussed during the visit to a service center of a vehicle.

 Multi meter:- A multi meter or a multi tester, also known as a VOM (Volt-Ohm meter), is an electronic measuring instrument that combines several measurement functions in one unit. A typical multi meter may include features such as the ability to measure voltage, current and resistance. 

Source:popularmechanics.com

A multi meter can be a hand-held device useful for basic fault finding and field service work or a bench instrument which can measure to a very high degree of accuracy. 

Importance of Multimeter:

They can be used to troubleshoot electrical problems in a wide array of industrial and household devices such as electronic equipment, motor controls, domestic appliances, power supplies, and wiring systems.

Tachometer:- 

A tachometer is an instrument that measures the working speed of an engine. It is mostly used to measure engine speeds of road vehicles in revolutions per minute. 

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The engine speed is displayed on the tachometer on a calibrated analogue dial. 

Hydrometer:-

A hydrometer is an instrument used to measure the specific gravity (or relative density) of liquids; that is, the ratio of the density of the liquid to the density of water. A hydrometer is usually made of glass and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright. 

The liquid to be tested is poured into a tall container, often a graduated cylinder, and the  hydrometer is gently lowered into the liquid until it floats freely. The point at which the surface of the liquid touches the stem of the hydrometer is noted. Hydrometers usually contain a scale.