Narula Infrastructure Interview Questions and Answers

SPD, or Surge Protective Device, protects electrical equipment from voltage spikes.

• SPD diverts excess voltage to the ground, preventing damage.

• Commonly used in residential and commercial buildings.

• Example: Protects computers and sensitive electronics from lightning strikes.

• Installed at service entrance or point of use for maximum effectiveness.

DG batteries provide reliable power for diesel generators, ensuring smooth operation during outages or peak loads.

• DG batteries store electrical energy to start diesel generators.

• They provide backup power during outages, ensuring continuous operation.

• Used in various applications like hospitals, data centers, and industrial plants.

• Example: A DG battery can power a generator that supports critical medical equipment d...read more

A fuel sensor measures the level of fuel in a tank, providing data for monitoring and management of fuel consumption.

• Monitors fuel levels in vehicles and machinery to prevent running out of fuel.

• Provides real-time data to the vehicle's onboard computer for efficiency.

• Can trigger alerts for low fuel levels, enhancing safety.

• Used in various applications, from cars to airplanes and industrial equipment.

DG, or Diesel Generator, provides backup power during outages and supports various applications in industries and infrastructure.

• Provides backup power during electrical outages, ensuring continuous operation of critical systems.

• Used in construction sites to power tools and equipment where grid power is unavailable.

• Commonly employed in hospitals to maintain essential services like life support systems during power ...read more

SMPS stands for Switched-Mode Power Supply, a power supply that efficiently converts electrical power.

• SMPS uses high-frequency switching to regulate output voltage.

• It is more efficient than linear power supplies, reducing heat generation.

• Commonly used in computers, televisions, and other electronic devices.

• Examples include ATX power supplies in PCs and chargers for laptops.

A 96 cable typically contains 96 individual optical fibers arranged in ribbons for efficient data transmission.

• A 96 cable can have 12 ribbons, each containing 8 fibers.

• Ribbons help in organizing fibers, making splicing easier.

• Example: In a 96-fiber ribbon cable, each ribbon can be color-coded for identification.

1Km cable loss varies by type; typically, fiber optics have lower loss than copper cables, measured in dB.

• Fiber optic cables can have a loss of about 0.2 to 0.5 dB per kilometer.

• Copper cables, like Cat5e, can have losses around 2 to 3 dB per kilometer.

• The type of cable and frequency used significantly affect the loss.

• Environmental factors, such as temperature and humidity, can also influence loss.

A 288 cable typically contains 288 individual fibers or tubes for data transmission, commonly used in telecommunications.

• A 288 cable is often used in fiber optic networks, providing high bandwidth.

• Each tube in a 288 cable can carry multiple fibers, enhancing data capacity.

• For example, a single tube may contain 12 or 24 fibers, depending on design.

• These cables are crucial for connecting data centers and telecommuni...read more