Current
This is used to convert AC voltage to DC voltage
Rectifier
Frequency or cycles per second
Hertz
If there is a hole in the floor of a workplace, the preferred method to protect workers from falls would be what?
Cover the opening and label it.
During an excavation, if the soil type is unknown, what type of soil should you consider it to be?
Type C soil
unsafe conditions
DCEP is this type of polarity
Reverse
Hard hats should be made of what?
fiberglass or reinforced plastic.
A personal fall arrest system should be inspected monthly by who?
Competent person
Type C
This power source is smaller and provides a faster response time with more waveform control
Inverter
When there is a potential to be exposed to asbestos, what must you do?
Report it to your supervisor and avoid disturbing it.
This is the measure of longitude stress
Tensile strength
When stacking materials you should never exceed what height to base ratio?
4:1
What is the most common type of grounding system used to protect from electric shock?
Three-wire system
A material that will support the flow of an electrical current
Conductor
What type of respirator should be used to protect you when dust or solid particles may be inhaled?
Half-mask or mouthpiece with mechanical filter
When placing a ladder against a platform or roof the ladder should extend how far ABOVE where the ladder touches the platform or roof?
3 Feet
During an excavation, who must complete the daily inspections of the job site?
Competent person
A measure of the probability, consequences, and exposure related to an event is referred to as what?
Risk
Direction of electrical current flow in a DC welding circuit
Polarity
The top half of an AC sine wave is considered this
Positive
Lanyards that have no shock absorbing features are only to be used for what?
What causes the most incidents during excavation?
cave ins
This is rule #1
MR. Vincent is #1 !