GREEN AND RENWABLE TECHNOLOGY
Solar panels mounted in the US should be facing?
South
The total resistance of three resistors in a parallel circuit with values of 5,7.5 and 20 ohms is?
2.61 ohms
The basic law for current in the series circuit states that current is the?
same in all parts of the circuit
A transformer converts?
higher voltage to lower voltage.
Preform a/an _______ test of high-voltage rated gloves before every use.
air-leakage
Photovoltaic panels convert sunlight to?
DC voltage
If the voltage source supplies 240 volts and the resistance measures 5 ohms, the current is
48 amps
A megohm equals?
one million ohms
The transformer winding to which the AC input voltage source is usually connected is called the ______ winding.
primary
Prescription glass eyewear can be used as safety glasses if?
the lenses are ANSI approved and side shields are worn.
A semiconductor diode that emits light when a voltage is applied to it is a/an?
LED
If two 15 ohm motor windings are connected in parallel, the total circuit resistance is?
7.5 ohms
If your lighting load is 3 V A per square foot for a residential area, what is the general lighting load of an area 30 feet by 40 feet?
3,600 volt-amperes
The ratio of a transformer with a primary voltage of 120 and a secondary voltage of 12 is?
1:10
According to OSHA, how should the worker deal with an energized or live circuit?
Work only on equipment that is marked or tagged dead.
A compact fluorescent bulb presents environmental hazards because it contains?
Mercury
How man watts are dissipated by an electric heater that draws 84 mA on a 240-volt line?
20.16W
One mA is equal to?
0.001
The rating of a single phase transformer whose maximum safe output is 480 volts at 4.16 amps is?
2KVA
Use a _____ fire extinguisher on an electrical fire.
Class C
Use a/an______ to detect kinetic energy.
Occupancy sensor
A 12-volt circuit has a resistance of 50 ohms. the total circuit current is?
240 mA
The National Electric Code (NEC) book states that only 80% of a circuit is permitted. Given this, how many 20-amp circuits are required to feed 22 receptacles if the receptacles are rated for 180 watts each and the voltage is 120?
2 circuits
Power transformers are rated in?
V A or KVA
To stop a nose bleed you should?
Lean forward and pinch the nostrils.