Questions in: Engineering

Right Answer:
The punch line of IOB (Indian Overseas Bank) is "Good People to Grow With."

Right Answer:
The 100W bulb will glow brighter because it has a lower resistance compared to the 40W bulb, allowing more current to flow through it in a series circuit.

Right Answer:
The types of earthing are:

1. Plate Earthing
2. Rod Earthing
3. Strip Earthing
4. Chemical Earthing
5. Building Earthing

Right Answer:
The thumb rule for calculating the power factor correction capacitor is approximately 0.5 microfarads (µF) per horsepower (HP) of the motor. For a 100 HP motor, you would need about 50 µF of capacitor.

Right Answer:
Induction generators operate by converting mechanical energy into electrical energy when driven above their synchronous speed. When connected to bus bars, they supply power to the grid. The rotor is driven by an external prime mover, causing it to rotate faster than the synchronous speed. This creates a negative slip, allowing the machine to generate electricity. The generated power is fed into the bus bars, where it can be distributed to the electrical network. Proper synchronization and reactive power management are essential for stable operation.

Right Answer:
I would choose the power of instant knowledge acquisition. This would allow me to learn and understand complex electrical systems and technologies quickly, improving my skills and efficiency in my work.

Right Answer:
In the next five years, I see myself advancing in my career as an O&M Engineer, taking on more responsibilities, leading projects, and contributing to the growth of the team and organization while continuously improving my technical skills and knowledge in the electrical field.

Right Answer:
Leadership means guiding and inspiring a group towards achieving common goals. The qualities required for effective leadership include:

1. Communication skills
2. Integrity
3. Empathy
4. Decision-making ability
5. Vision
6. Adaptability
7. Confidence
8. Accountability

Right Answer:
To calculate the consumption in kWh of a motor based on its kW ratings at different loads, use the following formula:

1. **At 100% Load:**
[
text{Consumption (kWh)} = text{Power (kW)} times text{Time (hours)}
]

2. **At 50% Load:**
[
text{Consumption (kWh)} = left(frac{text{Power (kW)} times 50}{100}right) times text{Time (hours)}
]

3. **At No Load:**
[
text{Consumption (kWh)} = text{No Load Power (kW)} times text{Time (hours)}
]

Replace "Time (hours)" with the actual operating time to get the consumption in kWh for each load condition.

Right Answer:
I have a background in electrical engineering with a focus on computer networking. I have experience in designing, implementing, and troubleshooting network systems. I am familiar with various networking protocols, hardware, and security measures. My skills include configuring routers and switches, managing IP addresses, and ensuring network reliability and performance.

Right Answer:
To calculate wire size according to current rating, use the following steps:

1. Determine the maximum current (in amperes) that will flow through the wire.
2. Refer to the National Electrical Code (NEC) or relevant local codes for ampacity tables, which provide the appropriate wire gauge for different current ratings.
3. Consider factors such as the wire material (copper or aluminum), insulation type, ambient temperature, and installation conditions.
4. Select a wire gauge that can safely carry the maximum current without exceeding its ampacity rating.

Right Answer:
The power factor affects the voltage drop in an electrical system; a lower power factor can lead to higher voltage drops, while a higher power factor helps maintain better voltage levels.

Right Answer:
B Class surge protection devices (SPDs) are designed for the protection of low-voltage electrical installations against surges from external sources, such as lightning strikes. They are typically installed at the service entrance of a building.

C Class surge protection devices are intended for the protection of electrical equipment and systems against surges that may occur within the installation, such as those caused by switching operations. They are usually installed closer to the equipment being protected.

The main difference is that B Class SPDs protect against external surges, while C Class SPDs protect against internal surges.

Right Answer:
Transformers are rated in KVA (kilovolt-amperes) because they are designed to handle both active (real) power and reactive power. The KVA rating reflects the total apparent power, which is independent of the power factor. This allows for a universal rating that applies to various loads without being affected by their power factor.

Right Answer:
EMF (Electromotive Force) is the energy provided by a source per unit charge, while voltage is the potential difference between two points in a circuit. EMF is the source's output, and voltage is what is measured across components in a circuit.

Right Answer:
NP2 Class RCC Hume pipes have a minimum crushing strength of 2.5 MPa, while NP3 Class RCC Hume pipes have a minimum crushing strength of 4.0 MPa. This means NP3 pipes are stronger and can handle higher loads compared to NP2 pipes.

Right Answer:
Curing for plastering should be done for at least 7 days, for brickwork at least 7 days, and for concrete at least 7 days, but ideally 28 days for optimal strength.