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Murray Loop Test for the fault location in Underground Cable Murray loop test for earth fault.Murray loop test for short circuit fault.

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Nepal Engineering Council Exam | Civil Engineering | Mock test 1 Nepal Engineering Council Exam | Civil Engineering | Mock test 1

In a game of pool, ball A is moving with a velocity 0 v of magnitude
0v  15 ft/s when it strikes balls B and C, which are at rest and aligned
as shown. Knowing that after the collision the three balls move in the
directions indicated and assuming frictionless surfaces and perfectly
elastic impact (that is, conservation of energy), determine the
magnitudes of the velocities , A v , B v and . C

The acceleration of a package sliding at Point A is 3 m/s². Assuming that the coefficient of kinetic friction is the same for each section, determine the acceleration of the package at Point B

Answer:

The bushings on the transformers are used to carry the lines out of and into the transformer, either the HV (High Voltage) or the LV (Low Voltage) lines, and to provide an insulation between the transformer body and the live wires, to prevent any possible short circuit.

The function of HT (High Tension) bushings is to provide insulation between the high voltage winding of the transformer and the outside world.

The function of LT (Low Tension) bushings is to provide insulation between the low voltage winding of the transformer and the outside world.

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HIGH VOLTAGE ENGINEERING NUMERICAL SOLVED

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CHAPTER 1: TOP 88 POINTS TO REMEMBER | NEPAL ENGINEERING COUNCIL | ELECTRICAL AND ELECTRONICS IN THIS VIDEO I HAVE COLLECTED TOP 88 IMPORTANTS POINTS FROM CHAPTER 1 . From these points , probably maximum question will be asked in the liscense exam.

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How does an electronics fan regulator work?

An electronic fan regulator, also known as a fan speed controller, works by controlling the voltage and frequency of the AC power supply to the fan motor. The regulator typically uses a triac or a similar solid-state device to vary the power supplied to the fan motor.

When the regulator is turned on, it receives the AC power supply and uses a small control circuit to adjust the voltage and frequency supplied to the fan motor. The control circuit sends a signal to the solid-state device, which controls the power supplied to the fan motor. By adjusting the power supply, the regulator can increase or decrease the speed of the fan.

Electronic fan regulators typically have several speed settings, which can be controlled by a k**b or a switch. The regulator adjusts the voltage and frequency of the AC power supply to match the desired speed setting. Higher speed settings result in higher voltage and frequency, while lower speed settings result in lower voltage and frequency.

It's important to note that electronic fan regulators are typically designed for use with AC induction motors, which are commonly used in ceiling fans and other types of fans. They may not work properly with other types of motors, such as DC motors. Additionally, it's important to choose a regulator that is compatible with the power rating and voltage of the fan motor to avoid damaging the motor or the regulator itself.

How does an induction stove work?

An induction stove uses an electromagnetic field to heat up ferromagnetic cookware directly. When an alternating electric current passes through a copper coil under the glass-ceramic surface, it creates an electromagnetic field. When a ferromagnetic material, such as cast iron or steel, is placed on the cooking surface, the magnetic field induces electrical currents within the metal, generating heat that cooks the food inside the cookware. The heat is generated only in the cookware, while the cooking surface itself remains relatively cool.

what causes a humming sound in the transmission line?

A humming sound in a transmission line can be caused by several factors, including:

Resonance: Resonance can occur when the frequency of an alternating current (AC) matches the natural frequency of a component in the transmission line. This can cause the component to vibrate and produce a humming sound.

Loose hardware: If a component in the transmission line is loose or has become detached, it can vibrate and produce a humming sound. This is often caused by mechanical wear and tear or damage from severe weather conditions.

Electromagnetic interference (EMI): EMI can be caused by electrical equipment, such as transformers or generators, that generate strong electromagnetic fields. These fields can interfere with the normal operation of the transmission line and cause a humming sound.

Corona discharge: Corona discharge is a phenomenon that occurs when high voltage electrical charges ionize the air around a conductor. This can cause a humming sound as well as other symptoms, such as sparks or visible arcs.

In order to diagnose and resolve the cause of a humming sound in a transmission line, it is important to have the line inspected by a qualified electrical engineer or technician. They can perform tests and inspections to determine the root cause and recommend the appropriate solution to fix the problem.

what are MCB, MCCB, and RCCB?

MCB, MCCB, and RCCB are all electrical components used for the protection of electrical systems.

MCB stands for Miniature Circuit Breaker. It is a type of breaker that is used to protect low-voltage electrical circuits from damage caused by overloading or short circuit. MCBs are designed to be compact and are typically used in residential and small commercial applications.

MCCB stands for Molded Case Circuit Breaker. It is a type of breaker that is used to protect medium to high voltage electrical circuits from damage caused by overloading or short circuit. MCCBs are designed to handle larger amounts of current than MCBs and are typically used in industrial and commercial applications.

RCCB stands for Residual Current Circuit Breaker. It is a type of breaker that is used to protect electrical circuits from the dangerous effects of earth leakage. An RCCB monitors the current flowing in the live and neutral wires and will trip (open the circuit) if it detects a difference between the two, which could indicate a dangerous situation such as an electrical shock. RCCBs are commonly used in residential and commercial applications to provide additional protection against electrical hazards.

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How did burning dead bodies change my thoughts about life? How did burning dead bodies change my thoughts about life?

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