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Synchronous motor runs at a constant speed while hysteresis motor has a rotor that follows the rotating magnetic field.
Synchronous motor is used in applications where constant speed is required, such as in clocks and timers.
Hysteresis motor is used in applications where precise control of speed is required, such as in record players and tape recorders.
Synchronous motor has a stator and rotor that rotate at the same spe...
PLC is a hardware device that controls industrial processes, while SCADA is a software system that monitors and controls those processes.
PLC is a programmable logic controller that controls the input/output of industrial processes.
SCADA is a supervisory control and data acquisition system that collects and analyzes data from the industrial processes.
PLC is a hardware device, while SCADA is a software system.
PLC is used...
Relays are used for low power applications while contactors are used for high power applications.
Relays are typically used in control circuits to switch low power loads such as lights and fans.
Contactors are used to switch high power loads such as motors and compressors.
Relays have a lower current rating than contactors.
Contactors have larger contacts and can handle higher currents than relays.
Relays are typically smal...
Switches are used to control the flow of current in a circuit, while relays are used to switch a circuit on or off.
Switches are manually operated, while relays are electrically operated.
Switches are used in low voltage applications, while relays are used in high voltage applications.
Switches are simple in construction, while relays are more complex.
Examples of switches include light switches and toggle switches, while ...
Switch is an electronic component used to connect or disconnect a circuit while a timer is a device used to measure time intervals.
Switch is used to turn on/off a device while timer is used to control the duration of a device's operation.
Switch is a binary device with two states (on/off) while timer can be analog or digital and can measure time in seconds, minutes, or hours.
Examples of switches include light switches, ...
I applied via Approached by Company and was interviewed in Nov 2024. There were 2 interview rounds.
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AC and DC are two types of electrical currents with different characteristics.
AC stands for alternating current, which periodically changes direction.
DC stands for direct current, which flows in one direction.
AC is commonly used in household appliances and power distribution systems.
DC is commonly used in batteries and electronic devices.
AC can be easily converted to different voltages using transformers.
DC is more sta
There are mainly three types of solar energy systems: solar photovoltaic (PV), solar thermal, and concentrated solar power (CSP).
Solar photovoltaic (PV) systems convert sunlight directly into electricity using solar panels.
Solar thermal systems use sunlight to heat water or air for use in buildings or to generate electricity.
Concentrated solar power (CSP) systems use mirrors or lenses to concentrate sunlight onto a sma...
Insulators are used in electrical systems to prevent the flow of electricity. They can be found in various locations.
Insulators are commonly found on electrical poles to support power lines.
Insulators are also used in electrical devices to prevent electrical current from flowing where it shouldn't.
Insulators can be made of materials such as glass, porcelain, or plastic.
Insulators are crucial in maintaining the safety a
Isolators are devices used to separate a specific area or process from its surroundings to prevent contamination or exposure.
Glove box isolator
Containment isolator
Pharmaceutical isolator
Biological safety cabinet
Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction.
Transformers consist of primary and secondary coils wound around a core
They can step up or step down voltage levels
Common examples include power transformers used in electrical substations
There are various types of transformers including power transformers, distribution transformers, instrument transformers, etc.
Power transformers are used in power generation and transmission
Distribution transformers are used to supply power to homes and businesses
Instrument transformers are used for measuring voltage and current levels
Auto transformers are used for voltage regulation
Isolation transformers are used to i
Loss transformers are transformers that experience a decrease in efficiency or performance due to various factors.
Loss transformers can be caused by factors such as overheating, overloading, poor maintenance, or insulation breakdown.
Loss transformers can result in decreased energy efficiency, increased energy consumption, and potential equipment damage.
Examples of loss transformers include those found in power distribu...
Transformers are classified based on their construction, cooling method, and purpose.
Transformers can be classified as core type or shell type based on their construction.
They can also be classified as dry type or oil-filled based on their cooling method.
Transformers can be power transformers, distribution transformers, instrument transformers, etc. based on their purpose.
Inverters are electronic devices that convert direct current (DC) to alternating current (AC) for use in electrical systems.
Inverters are commonly used in solar power systems to convert DC electricity generated by solar panels into usable AC electricity.
They are also used in backup power systems to convert DC power from batteries into AC power during power outages.
Inverters come in various sizes and types, including gr...
Rectifiers are electronic devices used to convert alternating current (AC) to direct current (DC) by allowing current to flow in only one direction.
Rectifiers are classified into two main types: half-wave rectifiers and full-wave rectifiers.
Half-wave rectifiers allow current to flow in one direction during one half of the AC cycle, while full-wave rectifiers allow current to flow in one direction during both halves of ...
Conductors are typically found in electrical systems and are used to carry electrical current.
Conductors are commonly found in electrical wires and cables.
They are used to transmit electricity from a power source to a device or appliance.
Examples of conductors include copper wires, aluminum wires, and metal bars.
Conductors have low resistance to electrical current flow.
A magnetic circuit is a closed path followed by magnetic flux.
Consists of a magnetic material that conducts magnetic flux
Includes a source of magnetic field (e.g. magnet)
May have air gaps or non-magnetic materials that affect the flow of magnetic flux
BHEL interview questions for popular designations
Plot no 02 sabji form is a form used for recording details of vegetables grown in Plot no 02.
Plot no 02 sabji form is used by farmers to keep track of the types and quantities of vegetables grown in Plot no 02.
The form may include fields for recording the date of planting, type of vegetable, quantity harvested, and any notes on the condition of the crop.
Examples of vegetables that may be recorded on the form include to
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