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Blocked rotor test is performed on a 3-phase induction motor to determine its impedance and calculate its locked rotor current.
The motor is connected to a 3-phase supply with the rotor blocked.
The voltage and current are measured and used to calculate the motor's impedance.
The locked rotor current can be determined from the impedance.
The test helps in assessing the motor's performance and identifying any faults or issu
Single phase induction motor is not self-starting due to the absence of rotating magnetic field. Different methods of starting include capacitor start, split-phase, shaded pole, and reluctance start.
Single phase induction motor lacks rotating magnetic field
Capacitor start uses a capacitor to create a phase shift and start the motor
Split-phase uses a starting winding to create a phase shift
Shaded pole uses a shading coi...
Different methods of resistance measurement and their ranges
Low resistance measurement: 4-wire Kelvin method, range 0.1 μΩ to 1 Ω
Medium resistance measurement: 2-wire method, range 1 Ω to 1 MΩ
High resistance measurement: Megohmmeter method, range 1 MΩ to 10 TΩ
Other methods include 3-wire method and 4-wire guarded method
Measurement accuracy depends on the method used and the quality of the equipment
Lightning arresters are used in transmission lines to protect the equipment and infrastructure from damage caused by lightning strikes.
Lightning arresters divert the high voltage surge caused by lightning strikes to the ground, preventing it from damaging the transmission lines.
They provide a low-resistance path for the lightning current to flow, reducing the risk of electrical breakdown and flashovers.
Lightning arrest...
I applied via Company Website and was interviewed in Sep 2023. There was 1 interview round.
RITES interview questions for popular designations
I applied via Company Website
Get interview-ready with Top RITES Interview Questions
I applied via Company Website and was interviewed in Jun 2023. There were 3 interview rounds.
Initial and Routine Pile Load Tests are conducted to assess the load-bearing capacity and performance of piles.
Initial Pile Load Test is performed on a single pile to determine its ultimate load capacity and settlement behavior.
Routine Pile Load Test is conducted on a representative sample of piles to verify the design assumptions and ensure the desired performance.
Initial Pile Load Test involves applying a gradually i...
Performance test of elastomeric bearings evaluates their ability to withstand load, deformation, and environmental conditions.
Performance test assesses the load-carrying capacity of elastomeric bearings.
It measures the deformation and displacement under different loads.
Tests evaluate the behavior of bearings under various environmental conditions like temperature and moisture.
Performance tests ensure the durability, st...
135/150 there were 75 questions of 2 marks of basic aptitude but time is also 1 hour
Stress and strain are related as stress is the force applied per unit area, while strain is the deformation caused by stress.
Stress is the force applied per unit area, while strain is the deformation caused by stress.
Stress is measured in units of force per unit area, such as pounds per square inch (psi) or pascals (Pa).
Strain is measured as the change in length or shape of a material due to stress, and is typically ex...
I was interviewed in Sep 2023.
I applied via Walk-in and was interviewed in Dec 2022. There were 2 interview rounds.
I applied via Company Website
Technical and general skill capability test conducted to shortlist suitale condidates.
About current affairs and views/ vison on the Company policy.
I applied via Newspaper Ad and was interviewed in Oct 2022. There were 2 interview rounds.
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Ircon International
Mecon
BHEL
Container Corporation of India