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A multimeter is an electronic device used to measure voltage, current, and resistance in electrical circuits.
It can measure AC and DC voltage
It can measure AC and DC current
It can measure resistance
It can also measure other electrical parameters such as capacitance and frequency
It typically has a digital display for easy reading
Examples of multimeter brands include Fluke, Klein Tools, and Extech
I applied via Walk-in and was interviewed before May 2020. There was 1 interview round.
I applied via Company Website and was interviewed before Jul 2020. There were 5 interview rounds.
The minimum number of rods in an RCC column depends on various factors such as column size, load, and design requirements.
The minimum number of rods in an RCC column is determined by the cross-sectional area of the column and the spacing between the rods.
The purpose of providing multiple rods is to ensure the structural integrity and strength of the column.
The number of rods required can be calculated using the formula...
Composite error and ratio error are two types of errors in current transformers.
Composite error is the combination of ratio error and phase angle error in a current transformer.
Ratio error is the difference between the actual turns ratio and the specified turns ratio of a current transformer.
Phase angle error is the angular difference between the primary and secondary currents of a current transformer.
Composite error a...
An AC drive circuit diagram controls the speed of an AC motor by varying the frequency and voltage of the power supplied to it.
An AC drive consists of a rectifier, DC link, inverter, and control circuitry.
The rectifier converts AC power to DC power, which is stored in the DC link.
The inverter converts the DC power back to AC power with variable frequency and voltage.
The control circuitry adjusts the frequency and volta...
A single line diagram of a distribution system is required with proper specifications.
The diagram should show the flow of power from the source to the load
It should include all components such as transformers, switchgear, and cables
The specifications should include voltage levels, power ratings, and protection devices
The diagram should follow standard symbols and conventions
Example: A 11 kV distribution system with a 5
Dewpoint test is done in transformer to check the moisture content in the insulation oil.
Moisture in insulation oil can cause breakdown of transformer insulation
Dewpoint test helps to determine the moisture content in the oil
It is a preventive maintenance measure to avoid transformer failure
The test involves cooling a mirror until dew forms on it, and measuring the temperature at which dew forms
Power transformers are used in transmission systems to step up or down voltage, while distribution transformers are used in distribution systems to step down voltage.
Power transformers are used in high voltage transmission systems to step up or down voltage for long distance transmission.
Distribution transformers are used in low voltage distribution systems to step down voltage for local distribution.
Power transformers...
Buchholz relay is used to protect transformers from faults by detecting gas and oil flow abnormalities.
Buchholz relay is installed in the pipe connecting the transformer tank and conservator tank.
It operates based on the principle that faults in the transformer generate gases and cause oil flow disturbances.
When gas or oil flow abnormalities occur, the relay trips and sends a signal to the control panel to isolate the ...
I applied via Walk-in and was interviewed in Jan 2023. There were 3 interview rounds.
I applied via Company Website and was interviewed in Aug 2024. There was 1 interview round.
132 /33 kv sub station
I applied via Naukri.com and was interviewed in Jan 2021. There was 1 interview round.
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