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National Certification Programme for Rooftop Solar PV Installer - pvinstaller.germi.org

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Interview Questions and Answers

Technicians should wear extremely highquality personal protective equipment (PPE).

Before beginning any project, a Job Safety Analysis (JSA) should be completed.

Physical fitness of employees is monitored on a regular basis for the difficult activities they are required to accomplish.

Make sure they have current medical certification that is appropriate for the work.

The use of inebriants on the job is strictly prohibited.

Personal Protective Equipment (PPE) including safety shoes, helmets, reflective jackets, gloves, and safety belts, as well as full body harnesses with permanent lifelines, should be required for all workers and jobs.

Answer appropriately.

Answer appropriately.

Lifelines and safety belts must be worn by employees who operate with stored materials in silos, hoppers, or tanks. To prevent slipping, tumbling, or collapsing, all tied material should be piled, placed on racks, blocked, interlocked, or otherwise secured.

Lifting objects from the floor or while seated is not a good idea.

Make use of the handling aids that are available.

Avoid making abrupt or rapid movements.

Lifting a load over an obstacle is never a good idea.

Lifts should be done in areas with sufficient footing, space, and lighting.

To make relocating easier, modify items and rework jobs.

Answer appropriately.

microinverter: A solar microinverter, or simply microinverter, is a plugandplay device used in photovoltaics, that converts direct current (DC) generated by a single solar module to alternating current (AC). The output from several microinverters can be combined and often fed to the electrical grid.

Ongrid: Ongrid means your solar system is tied to your local utility's GRID.

Gridconnected: A gridconnected photovoltaic system, or gridconnected PV system is an electricity generating solar PV power system that is connected to the utility grid.

Gridtied and Offgrid: gridtied is beneficial because you don't have to buy an expensive battery backup system to store any excess energy. Being offgrid means you are not connected in any way to your grid's power system or utility company.

optimizer: The SolarEdge Power Optimizer is a DC/DC converter which is connected by installers to each solar module, turning them into smart modules.

Net Metering: Net metering is a mechanism which allows domestic or commercial users who generate their own electricity using solar panels or photovoltaic systems to export their surplus energy back to the grid.

string solar systems: When stringing in series, the wire from the positive terminal of one solar panel is connected to the negative terminal of the next panel and so on.

Answer appropriately.

The solar panels generate DC electricity as the sun shines on them.

The DC electricity is fed into a solar inverter, which converts it to 240 V 50 Hz AC electricity.

Appliances in your home are powered by 240V AC energy.

Electricity that is not consumed is routed back into the main grid.

Avoid installing solar panels in shaded areas, Clean your solar panels, Monitor your solar panel output, and Buy panels with High Concentrated Photovoltaic (CPV) Cells.

Water can seep into these wirings, causing the solar panels to be damaged. Solar panels are usually covered on the front with a thin layer of glass and on the back with a durable polymerbased substance. To make the solar panels waterproof, these materials are combined with a metal frame and a specific sealant glue.

A residential solar panel system has 72 cells and measures 65 by 39 inches, whereas a commercial solar panel system has 96 cells and is 78 by 39 inches. Commercialsized solar panels, on the other hand, produce more power and are more efficient, therefore they should be considered for your home.

Both home and commercial solar panel systems are installed utilizing the same bolted racking technology. Commercial roofs, unlike residential roofs, are typically flat, making installation easier. Commercial systems, on the other hand, can take up to a month to install, but residential solar panels typically take one or two days.

Commercial solar panel systems tend to be white, residential systems are black or white.

The performance of the PV panel system is improved by reflecting light over the solar panel, which boosts output currents and nominal voltage.

GROUND RACKING, POLE MOUNTS, and PARKING CANOPY.