nabcep practice
500W/m² for 4 hours is
a. 20kWh
b. 2kWh
c. 2kW
d. 5kW - ANS-b. 2kW
a 100kW STC PV system with the eight% gadget loses, the usage of PV that is +three 0%
production tolerance, a ninety five% green inverter, what would be the expected AC output if
one thousand/m² irradiance?
A. Eighty four.8kW
b. 100kW
c. 87.4kW
d. 88.7kW - ANS-c. 87.4kW
a 12V light is left on for 13 hours at 1.5A with a 12V battery. How many Ah are used?
A. 23Ah
b. Zero.234kWh
c. 23.4Wh
d. 19.5Ah - ANS-d. 19.5Ah
a 12V light is left on for 13 hours at 1.5A with a 12V battery. How an awful lot electricity became
used?
A. 23Ah
b. 0.234kWh
c. 23.4Wh
d. 19.5Ah - ANS-b. Zero.234kWh
a 4kW PV machine with 15% losses in a vicinity with four.Five solar hours in step with day, what
will be the annual output?
A. 985.5kWh
b. 1450kWh
c. 5585kWh
d. 4550kWh - ANS-c. 5585kWh
A PV array at a higher elevation could have a tendency to provide greater
, a. Current
b. Heat
c. Resistance
d. Polysilicon - ANS-a. Current
A machine that sits on a flat/low slope rooftop and has no penetrations is referred to as a
a. Flush established device
b. Flashed system
c. BIPV machine
d. Ballasted gadget - ANS-d. Ballasted gadget
According to Ohms regulation and voltage drop, the connection between voltage and modern is
a. Proportional
b. Inversely proportional
c. Directly Inverse
d. Indirectly direct - ANS-a.Proportional
An array in Sacramento California in August isn't always generating as anticipated . Which of
the subsequent is NOT a likely hassle?
A. Decreased AC twine length and voltage loss
b. String size too short
c. String length too long
d. Soiling - ANS-c. String length too long
an off grid set up has 1 HP pump that is on 10% of the time & a 20W light this is on 100% of the
time. What is the strength use in line with month
a. Fifty four Wh
b. 68 Wh
c. 68 kWh
d. 0.63 MWh - ANS-c. 68 kWh
Best sealants for residential rooftop
a. Polyurethane and silicone
b. Tar and paraffin
c. Bitumen and rubber
d. Silicon and caulk - ANS-a. Polyurethane and silicone
Bypass diodes
500W/m² for 4 hours is
a. 20kWh
b. 2kWh
c. 2kW
d. 5kW - ANS-b. 2kW
a 100kW STC PV system with the eight% gadget loses, the usage of PV that is +three 0%
production tolerance, a ninety five% green inverter, what would be the expected AC output if
one thousand/m² irradiance?
A. Eighty four.8kW
b. 100kW
c. 87.4kW
d. 88.7kW - ANS-c. 87.4kW
a 12V light is left on for 13 hours at 1.5A with a 12V battery. How many Ah are used?
A. 23Ah
b. Zero.234kWh
c. 23.4Wh
d. 19.5Ah - ANS-d. 19.5Ah
a 12V light is left on for 13 hours at 1.5A with a 12V battery. How an awful lot electricity became
used?
A. 23Ah
b. 0.234kWh
c. 23.4Wh
d. 19.5Ah - ANS-b. Zero.234kWh
a 4kW PV machine with 15% losses in a vicinity with four.Five solar hours in step with day, what
will be the annual output?
A. 985.5kWh
b. 1450kWh
c. 5585kWh
d. 4550kWh - ANS-c. 5585kWh
A PV array at a higher elevation could have a tendency to provide greater
, a. Current
b. Heat
c. Resistance
d. Polysilicon - ANS-a. Current
A machine that sits on a flat/low slope rooftop and has no penetrations is referred to as a
a. Flush established device
b. Flashed system
c. BIPV machine
d. Ballasted gadget - ANS-d. Ballasted gadget
According to Ohms regulation and voltage drop, the connection between voltage and modern is
a. Proportional
b. Inversely proportional
c. Directly Inverse
d. Indirectly direct - ANS-a.Proportional
An array in Sacramento California in August isn't always generating as anticipated . Which of
the subsequent is NOT a likely hassle?
A. Decreased AC twine length and voltage loss
b. String size too short
c. String length too long
d. Soiling - ANS-c. String length too long
an off grid set up has 1 HP pump that is on 10% of the time & a 20W light this is on 100% of the
time. What is the strength use in line with month
a. Fifty four Wh
b. 68 Wh
c. 68 kWh
d. 0.63 MWh - ANS-c. 68 kWh
Best sealants for residential rooftop
a. Polyurethane and silicone
b. Tar and paraffin
c. Bitumen and rubber
d. Silicon and caulk - ANS-a. Polyurethane and silicone
Bypass diodes
