NTPC-Sail Power Company Coal Handling Plant Operator Interview Questions and Answers

I come from a close-knit family of four, including my parents and younger sister.

• My parents have always been supportive of my career choices

• I have a younger sister who is currently studying in college

• We enjoy spending quality time together on weekends, often going for family outings or movie nights

Power flows from one end to the other through a closed circuit, following the path of least resistance.

• Power flows through conductive materials such as wires or cables.

• It is generated at a power source, such as a generator or a battery.

• The power source creates a potential difference, or voltage, which pushes the electrons to flow.

• The electrons flow from the higher potential end to the lower potential end.

• The flow of el...read more

When a fan rotates in the opposite direction, it reverses the airflow and can cause the fan to function improperly.

• Reversing the direction of a fan can disrupt the intended airflow in a room.

• In some cases, reversing the fan direction can lead to decreased cooling or heating efficiency.

• Changing the fan direction can also affect the distribution of air in the room.

• For ceiling fans, reversing the direction can change the ...read more

The lines connecting other countries in NER refer to the international borders and transportation routes.

• The international borders of NER connect it with neighboring countries like Bhutan, China, and Myanmar.

• Transportation routes like roads, railways, and airways also connect NER with other countries.

• Examples of transportation routes include the India-Myanmar-Thailand Trilateral Highway and the India-Bhutan Friendship

PowerGrid is involved in the transmission and distribution of electricity.

• PowerGrid is responsible for the transmission of electricity from power generating stations to distribution substations.

• They also manage the distribution of electricity to end consumers through a network of transmission lines and substations.

• PowerGrid ensures the reliability and stability of the power grid by monitoring and maintaining the transm...read more

Yes, I am a self-motivated person who takes initiative and sets goals to achieve success.

• I consistently set personal and professional goals to challenge myself and strive for success.

• I take the initiative to learn new skills and improve my knowledge in order to excel in my role.

• I am proactive in seeking out opportunities for growth and development within my field.

• For example, in my previous role, I took on additional p...read more

Efficiency of a boiler can be increased by improving insulation, optimizing combustion, and regular maintenance.

• Improve insulation to reduce heat loss

• Optimize combustion by adjusting air-to-fuel ratio and using efficient burners

• Regular maintenance to clean and repair components

• Use economizers to recover waste heat

• Upgrade to high-efficiency boilers

• Implement energy management systems to monitor and control boiler operati

I am seeking new challenges and growth opportunities in my career.

• Seeking new challenges and growth opportunities

• Looking for a change to broaden my skillset

• Interested in working with a new team and learning from their expertise

The fuse rating for a 22 kW motor depends on the starting current and the type of motor.

• The starting current of the motor should be considered when selecting the fuse rating.

• The type of motor (e.g. induction, synchronous) also affects the fuse rating.

• Consult the motor manufacturer's specifications or a qualified electrician for the appropriate fuse rating.

• A general rule of thumb is to use a fuse rating of 125% of the m

Star delta starter is used to reduce starting current and torque in induction motors.

• Reduces starting current and torque in induction motors

• Protects motor windings from damage

• Increases motor lifespan

• Used for high power motors

• Commonly used in industries such as oil and gas, mining, and manufacturing

The unit of vibration is Hertz (Hz).

• Vibration is a measure of the frequency of oscillation of a mechanical or electrical system.

• Hertz is the unit of frequency, defined as one cycle per second.

• Vibration can be measured using instruments such as accelerometers and vibrometers.

• Vibration is an important consideration in the design and maintenance of electrical systems.

• Examples of electrical systems that may experience vibr...read more

An antipumping relay is used to prevent the breaker from repeatedly closing and opening in case of a fault.

• The antipumping relay is a protective device used in circuit breakers.

• It prevents the breaker from 'pumping' or repeatedly closing and opening due to a fault.

• When a fault occurs, the relay detects the fault current and prevents the breaker from reclosing until the fault is cleared.

• This helps to protect the electri...read more