What is a ducter tester?

When is electrostati a risk? Is it all right to cover electric wires with insulation in attic? How does zener diode work? How many wall plugs can be run off a 15 amp breaker? When do you test the portable GFCI? How do darlington transistors work? Why is the handle of the screwdriver made of an insulator? What of percentage building costs is plumbing and electricals? Why the induction motor does not have armature reaction? What is the function of capacitor across the supply to the fluorescent lamp when it is used? Can you use a fan control switch as a dimmer switch? Which transistor configuration has the highest input impedance? Is the neutral conductor of a two wire single phase circuit considered a current carrying conductor? Do boy have better gross motor or fine motor skills? What is a class 2 circuit? What is the Q factor in RLC circuit? The net accumulation of electric charges on an object are called? Is polythene a thermal conductor? What happens on another another when one pressees kyts on his hand set when they are cinnected by use of epabx that means which signal this hand set sends on another side.....what signals on another? German scientist who gave his name to the cgs unit of magnetic flux density?