Sample Exam 1

An ammeter in combination with which other kind of meter could measure power?

• Ohmmeter

• Voltmeter

• Energy meter

• Pyranometer

You find a dc disconnect with an open door. You should assume:

• Since you cannot open the door without the disconnect being off, then the disconnect is safe to work on.

• That the disconnect is being worked on by another electrician.

• That all conductors and terminals in the disconnect are energized.

• That line and load are only energized in the open position.

How do you measure dc voltage?

• Turn the voltmeter voltage to a dc voltage setting higher than you are going to measure and put the red probe on positive and the black probe on negative.

• Put the volt clamp around the conductor you are going to measure and then turn on the voltmeter.

• Put the volt clamp on the conductor after turning on the voltmeter.

• Turn the meter to the power setting and then divide by current.

What is the best way of the following to avoid getting shocked?

• Turning things off before you work on them.

• Using double insulated tools.

• Lockout tagout of PV modules when carrying them to the roof.

• Grounding ungrounded conductors before working on them.

When calculating energy, which units should you use for the current in your equation?

• A for Amperes

• I for current

• C for current

• F for flow

Which device measures resistance?

• Voltmeter

• Ammeter

• kWh meter

• Megohmmeter

What is the first action to take when a ground fault is indicated by an inverter?

• Diagnose and fix the ground fault

• Close the dc disconnect

• Open the dc disconnect

• Disconnect the strings

What does irradiance on a dc PV source circuit affect the most?

• Voltage

• Resistance

• Current

• Coefficience

Which type of PV is developed from cast ingots?

• Monocrystalline

• Thin film CdTe

• Thin film Gallium Arsenide

• Polycrystalline

What is an example of a direct coupled PV system?

• A PV system with a battery and no charge controller with the load designed, so that it does not overcharge the battery.

• A PV system that is directly connected to the utility

• PV and a load with no energy storage or utility connection

• Every water pumping PV system is direct coupled