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Theory of machine is a branch of engineering that deals with the study of machines and their mechanisms.
Theory of machine focuses on understanding the principles behind the operation of machines.
It involves studying the design, construction, and operation of machines.
Examples include studying the movement of gears in a gearbox or the operation of a piston in an engine.
PA fan stands for Primary Air fan, which is used in power plants to supply air for combustion in the boiler.
Supplies primary air for combustion in the boiler
Helps in maintaining proper air-fuel ratio for efficient combustion
Assists in controlling the temperature and pressure inside the boiler
Improves the overall efficiency of the boiler
Examples: FD fan in a power plant
ID fan is used to control the draft in the furnace while PA fan is used to supply combustion air to the furnace.
ID fan is located at the outlet of the furnace while PA fan is located at the inlet of the furnace.
ID fan helps in maintaining negative pressure inside the furnace while PA fan helps in supplying air for combustion.
ID fan is used to extract flue gases from the furnace while PA fan is used to supply primary an...
I applied via Approached by Company and was interviewed in Sep 2021. There was 1 interview round.
Ash handling department deals with the collection, transportation, and disposal of ash generated from power plants.
Ash is collected from the furnace and transported to the ash handling system
The ash is then processed and disposed of in an environmentally friendly manner
Different types of ash handling systems are used depending on the type of fuel used in the power plant
The ash handling department also ensures complianc...
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I applied via Apprenticeship India and was interviewed in Mar 2021. There was 1 interview round.
I applied via Campus Placement and was interviewed before Oct 2020. There was 1 interview round.
I applied via Campus Placement and was interviewed in Dec 2021. There were 2 interview rounds.
posted on 22 Feb 2024
A circuit breaker is a device that automatically interrupts the flow of electric current in a circuit to protect against short circuits.
Circuit breakers are designed to prevent damage to electrical equipment and wiring caused by excessive current.
They work by detecting abnormal current flow and quickly opening the circuit to stop the flow of electricity.
This helps to prevent overheating, fires, and other hazards that c...
Transformers are electrical devices that transfer energy from one circuit to another through electromagnetic induction.
Transformers work by changing the voltage and current levels of an alternating current (AC) power supply.
They consist of two coils of wire, called the primary and secondary windings, wrapped around a magnetic core.
When an AC voltage is applied to the primary winding, it creates a magnetic field that in...
A motor is a machine that converts electrical energy into mechanical energy.
Motors are used in various applications such as fans, pumps, and vehicles.
There are two types of motors: AC motors and DC motors.
AC motors are commonly used in household appliances while DC motors are used in electric vehicles.
Motors work by using the interaction between a magnetic field and an electric current to produce motion.
The speed of a ...
AC and DC currents are two types of electrical currents with different characteristics.
AC (Alternating Current) is a type of electrical current that periodically changes direction.
DC (Direct Current) is a type of electrical current that flows in only one direction.
AC is commonly used in household electrical systems, while DC is used in batteries and electronic devices.
AC current is generated by power plants and transmi...
The electric frequency in India is 50hz.
Electricity in India operates at a frequency of 50hz.
This is the same frequency used in most countries in Asia and Europe.
The frequency is important for the proper functioning of electrical appliances.
A relay is an electrically operated switch that uses an electromagnet to mechanically open or close a circuit.
Relays are commonly used in electrical systems to control high voltage or high current circuits with low voltage signals.
They can be used for a variety of applications such as controlling lights, motors, and solenoids.
Relays come in different types such as electromagnetic, solid-state, and reed relays.
They are ...
AC electric current is a type of electrical current that periodically reverses direction.
AC stands for Alternating Current
It is commonly used in household appliances and power grids
The voltage and frequency of AC current can vary depending on the application
Examples of AC current include the power supply in your home and the electricity used to power electric motors
Solar energy is the energy obtained from the sun's radiation and converted into usable energy.
Solar energy is renewable and sustainable.
It is harnessed through the use of solar panels, which convert sunlight into electricity.
Solar energy can be used for a variety of purposes, including powering homes and businesses, heating water, and even powering cars.
It is a clean source of energy, producing no greenhouse gas emissi...
A control system is a system that manages, commands, directs, or regulates the behavior of other devices or systems.
Control systems are used in various fields such as engineering, manufacturing, and automation.
They can be either open-loop or closed-loop systems.
Open-loop systems do not have feedback, while closed-loop systems use feedback to adjust their output.
Examples of control systems include thermostats, cruise co...
Current can be measured using an ammeter.
An ammeter is connected in series with the circuit to measure current.
The ammeter should have a suitable range for the expected current.
The circuit should be turned off before connecting the ammeter.
The ammeter should be connected in the correct orientation.
The reading on the ammeter should be recorded and interpreted correctly.
Voltage can be measured using a voltmeter or a multimeter.
Connect the voltmeter/multimeter to the circuit or component being measured
Set the range of the voltmeter/multimeter to the appropriate voltage level
Read the voltage measurement displayed on the voltmeter/multimeter
Ensure proper grounding and safety precautions are taken
Examples of voltage measurements include measuring the voltage of a battery or power supply
posted on 21 Nov 2024
Grade of concrete refers to the strength of the concrete mix design.
Grade of concrete is denoted by the ratio of cement, sand, and aggregates in the mix.
Common grades of concrete include M10, M15, M20, M25, etc.
Higher grade of concrete indicates higher strength and durability.
For example, M20 grade concrete has a mix ratio of 1:1.5:3 (cement:sand:aggregate).
posted on 17 Apr 2021
I applied via Other and was interviewed before Apr 2020. There was 1 interview round.
Service tax has been replaced by GST since July 2017. NPV is still relevant for investment decisions.
Service tax has been subsumed under GST since July 2017
NPV stands for Net Present Value and is used to evaluate investment decisions
NPV takes into account the time value of money and calculates the present value of future cash flows
NPV is still relevant and widely used in finance and investment analysis
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