Remove the battery from the cordless drill / driver before changing the drill bit. This reduces the risk of starting the power tool accidentally.This is an unnecessary practice.This practice is regarded as a safe practice.

If the drill has a keyed (Jacobs) chuck you will need to remove the chuck key after fitting or removing the drill bit.This practice is regarded as a safe practice.This is an unnecessary practice.

Always set the speed change lever fully to the correct position. If you operate the cordless drill / driver with the speed change lever positioned halfway between the "1" side and "2" side, you may damage it.FALSETRUE

The drilling machine should be set at the correct speed for the diameter of the drill bit.This practice is regarded as a safe practice.This is an unnecessary practice.

Select the hazard that is NOT ordinarily an issue when operating the cordless drill/driver.high vibration emission valueshigh noise levelshazardous back strainburns from hot materials or drill bit

Which of the following general precautions is important to safe power tool use and should be observed by the tool user?: A. Never yank the cord or the hose to disconnect it from the receptacle B. Disconnect tools when not in use, before servicing and when changing accessories such as blades, bits and cutters C. All observers should be kept at a safe distance away from the work area D. All of the above