Engine 2014: Electricity

1. A Never use this tester on circuits of 60 Hz, as the tester may not register the voltage.
2. B Always remember that the unit is polarity sensitive and if  used on DC circuits reversing the leads may result in high temperatures within the tester.
3. C Never connect the device to circuits where potentials are greater than 120 volts.
4. D Always check a known power source of the same type and voltage before using it to troubleshoot electrical equipment.

Tip: press A-D to answer