NTPC Interview Questions, Process, and Tips

Various instruments are used in the workplace, including pressure gauges, temperature sensors, flow meters, control valves, and analyzers.

• Pressure gauges are used to measure the pressure of fluids or gases in pipes or vessels.

• Temperature sensors are used to measure the temperature of equipment or processes.

• Flow meters are used to measure the flow rate of liquids or gases.

• Control valves are used to regulate the flow or ...read more

Technical problems faced by C&I Technicians and their solutions

• Calibration issues with instruments: Regularly calibrating instruments and ensuring proper maintenance can solve this problem.

• Electrical faults: Conducting regular inspections and preventive maintenance can help identify and fix electrical faults.

• Software glitches: Keeping software up to date and troubleshooting any issues can resolve software glitches.

• Comm...read more

To calibrate a pressure gauge, switch, and transmitter, follow these steps:

• Ensure the equipment is clean and free from any debris

• Check the manufacturer's instructions for specific calibration procedures

• Use a known reference pressure source to apply a known pressure to the equipment

• Compare the readings on the equipment to the reference pressure and make necessary adjustments

• Repeat the process at different pressure level...read more

To check and confirm seal faults, perform visual inspection, conduct pressure tests, and use leak detection methods.

• Perform a visual inspection of the seals for any visible damage or wear.

• Conduct pressure tests to check for any leaks or abnormal pressure readings.

• Use leak detection methods such as bubble testing or ultrasonic testing to identify any seal faults.

• Inspect the sealing surfaces for any signs of leakage or i...read more

When command or feedback is not received, I follow a systematic process to identify and resolve the issue.

• Check the communication channels for any disruptions or malfunctions

• Verify the connections and wiring to ensure they are properly connected

• Inspect the equipment for any faults or errors

• Troubleshoot the control system or software for any issues

• Collaborate with other technicians or experts to gather insights and pote...read more

The size of instruments can vary depending on their purpose. CRC and WD40 are both types of lubricants commonly used in maintenance and repair work.

• Instrument size can range from small handheld devices to large machinery.

• CRC is a brand that produces various types of lubricants, cleaners, and corrosion inhibitors.

• WD40 is a specific type of lubricant known for its ability to displace moisture and prevent rust.

• Both CRC an...read more

A multimeter has multiple uses and continuity is an important feature.

• A multimeter can be used to measure voltage, current, and resistance.

• It can also be used to test continuity, which is the ability of a circuit to conduct electricity.

• Continuity testing is done by connecting the multimeter probes to different points in a circuit and checking if there is a complete path for current flow.

• If there is continuity, the mult...read more

RTD and thermocouples are used to measure temperature in different ways.

• RTD (Resistance Temperature Detector) measures temperature by sensing the change in electrical resistance of a metal wire as temperature changes.

• Thermocouples measure temperature by utilizing the principle of the Seebeck effect, which generates a voltage when two dissimilar metals are joined at two different temperatures.

• To calculate temperature us...read more

The position of cylinders and switch valves in a C&I Technician role is crucial for controlling and regulating fluid flow in industrial processes.

• Cylinders and switch valves are typically positioned strategically along pipelines and equipment to control the flow of fluids or gases.

• The position of cylinders and switch valves depends on the specific process requirements and the desired control parameters.

• Cylinders are of...read more

The SOV work process involves several steps to ensure efficient and safe operation.

• The first step is to receive work orders and review them for accuracy and completeness.

• Next, the technician must gather the necessary tools and equipment for the job.

• Before starting the work, the technician should conduct a thorough risk assessment to identify any potential hazards.

• Once the work area is prepared and safe, the technician ...read more

The oil pressure sensor measures the pressure of oil in an engine to ensure proper lubrication and prevent damage.

• The oil pressure sensor is typically located near the oil filter or oil pump.

• It uses a pressure-sensitive diaphragm or transducer to convert oil pressure into an electrical signal.

• The sensor sends the signal to the engine control unit (ECU) or oil pressure gauge for monitoring.

• If the oil pressure drops belo...read more

A level transmitter is a device used to measure the level of a substance in a tank or vessel.

• There are various types of level transmitters, including ultrasonic, radar, capacitance, and differential pressure transmitters.

• Ultrasonic level transmitters use sound waves to measure the distance between the transmitter and the substance's surface.

• Radar level transmitters use radio waves to determine the level of the substanc...read more

Bag filter purging process involves removing accumulated dust from the filter bags.

• Bag filter purging process is used to maintain the efficiency of the filter.

• It involves removing the accumulated dust from the filter bags.

• Purging can be done through various methods such as reverse air, pulse jet, or shaker mechanisms.

• Reverse air purging involves blowing compressed air in the opposite direction of the gas flow to dislod...read more

4 to 20 milliampere supply is commonly used for its wide range, accuracy, and compatibility with industrial control systems.

• 4 to 20 mA is a standard current signal used in industrial automation and control systems.

• It provides a wide range of values, allowing for precise control and measurement.

• The 4 mA lower limit ensures that a zero value can be easily detected, while the 20 mA upper limit provides a maximum value.

• Thi...read more

Safety precautions for work online system and supply

• Ensure proper grounding and insulation of electrical equipment

• Regularly inspect and maintain equipment to identify and address any potential hazards

• Follow lockout/tagout procedures when working on electrical systems

• Use personal protective equipment (PPE) such as gloves, safety glasses, and protective clothing

• Adhere to safety protocols and guidelines provided by the co...read more