3-2-2 Flashcards
The amount of body current depends upon both the voltage across the body and the ?
Resistance of the body
Tests to evaluate the body’s reaction to low currents were conducted on volunteers by ?
Charles Dalziel
A current of 1.1 milliamperes will cause slight tingling in the hand of an average male worker. This current threshold level is called ?
Perception
At the ? Current threshold muscles contract and a hand grip on an energized object cannot be released
Let go
A current of 0.016 amperes is equal to ?
16 mA
An assumed body resistance of ? While an approximation alllws calculations to be made for worker protection methods
1000 ohms
A current of as little as ? Lasting three seconds will result in possible ventricular fibrillation in both men and women
100 mA
A short shock with a time duration of 0.03 seconds and a body current of ? Can have the same result as a longer shock (3.0 seconds) with a body current of 0.1 amperes
1A
When contact is made with a line energized at ? Or more the outer skin can be punctures allowing higher currents to flow through inner body tissues
1,000 volts
The human body can withstand a higher current for a shorter time or a lower current for a longer time and avoid heart fibrillation
True
The most serious current path through the body occurs through ?
Hand to hand
The perception and let go current thresholds differ from men to women
True
The formula I=k/square root of t is used to calculate ?
Worker body current
To return the heart to a rhythmic beat ?
Use an AED
The research discussed in the reference material considers a longer shock in which current flows for a duration of ?
3 seconds
Research found that male worker should be protected against body current to a perception level of?
1.1 mA
A body current of ? Will result in certain death from a 0.03 second shock
2.75 A
A painful and severe shock causing difficulty in breathing and muscle contraction will occur in men with a body current of ?
0.023
The speed at which overcurrent protection devices operate must be considered when determining worker protection methods
True
Voltage flow through the human body causes burning of body tissues
False
The type of boots and gloves worn can affect the resistance across worker contact points
True
Higher body current levels occur when ?
The skin is punctured
The human body is not designed to handle even the most minimal of electrical currents
True
