Accounting
Anthropology
Archaeology
Art History
Banking
Biology & Life Science
Business
Business Communication
Business Development
Business Ethics
Business Law
Chemistry
Communication
Computer Science
Counseling
Criminal Law
Curriculum & Instruction
Design
Earth Science
Economic
Education
Engineering
Finance
History & Theory
Humanities
Human Resource
International Business
Investments & Securities
Journalism
Law
Management
Marketing
Medicine
Medicine & Health Science
Nursing
Philosophy
Physic
Psychology
Real Estate
Science
Social Science
Sociology
Special Education
Speech
Visual Arts
Question
8. A certain string of Christmas tree lights has twenty bulbs, each rated at 3 watts. If there is no ground fault, how much current flows through the hot wire at the receptacle plug? Show calculations. How much flows through the neutral? Would the current flow likely be fatal if all of the current flowing through the hot wire would pass through a person's heart muscle?Answer
This answer is hidden. It contains 201 characters.
Related questions
Q:
56. Which metal indicates a heavier load?a. brassb. nickel
Q:
49. The device pictured is best characterized as a
a. check valve
b. spring-loaded cut-off valve
c. pressure regulator
d. coupling
Q:
46. The principal hazard of mushroomed heads is
a. slivers in the eye
b. hand injuries
c. loss of hearing
d. atomic radiation
Q:
27. The greatest concern for construction workers' eyes is for exposure to lasers.a. trueb. false
Q:
15. The general construction area minimum lighting standard is
a. 5 foot-candles
b. 10 foot-candles
c. 15 foot-candles
d. none; there is no general lighting standard for construction sites
Q:
14. The general construction area minimum lighting standard is
a. 3 foot-candles
b. 5 foot-candles
c. 10 foot-candles
d. 20 foot-candles
Q:
13. What are the two principal ingredients of a fire prevention plan?
Q:
10. Name at least four physical conditions that should disqualify an employee from serving in a fire brigade.
Q:
5. What are the three basic facets or strategies for fire safety programs?
Q:
3. Which of the following fire hazards is not properly addressed by the four classes of fire extinguishers?
a. LPG
b. gasoline
c. energized electrical equipment
d. paper
Q:
1. Why would ruptured eardrums be a hazard to fire brigade members?
a. They might not hear the fire alarm.
b. Excessive heat might worsen their condition.
c. The use of respirator equipment would be ineffective.
d. None of the above.
Q:
68. Explain the principle of "closed circuit" operation of SCBA units.
Q:
65. Describe the situation that is known to frequently result in a series of multiple fatalities, i.e., victim, then rescuer, then rescuer of the rescuer, etc. What standard (general name only) does OSHA cite in these situations(a) prior to 1993 and (b) after 1993?
Q:
57. Discuss in general the characteristics of confined spaces that make them hazardous.
Q:
55. Which of the masks shown is approved for oxygen-deficiency?(a)(b)(c)none of these(d)(e)
Q:
20. The U.S. annual fire death rate is approximately:a. one per millionb. ten per millionc. fifty per milliond. one hundred per million
Q:
19. The U.S. annual fire death rate is approximately:
a. one per million
b. eleven per million
c. thirty per million
d. one hundred per million
Q:
52. Which of the following types of supplied air respirators might explode if immersed in water?
a. pressure demand
b. sulfur dioxide reactor unit
c. chemical oxygen generating unit
d. demand flow
Q:
51. Which of the following modes of air line respirator is most dependent upon fit for its effectiveness?
a. continuous demand
b. demand flow
c. pressure demand
d. continuous flow
Q:
47. The air line respirator derives its name froma. its use by the airlines in emergency losses of cabin pressureb. its ability to purify air in the air linec. its ability to supply atmosphere through an air lined. the fact that not only inhaled air but also exhaled air is transported through an air line
Q:
24. Because they are likely to leak, dust masks are not as popular as other respirators.a. trueb. false
Q:
21. Dust masks are not approved for particulates.a. trueb. false
Q:
18. A gas mask is more effective than a cartridge respirator in an oxygen-deficient atmosphere.a. trueb. false
Q:
6. What alternative is permitted to qualify an air-purifying device to be approved for a toxic substance that has no warning properties?
Q:
4. Explain the chemical process (name ingredients) that generates oxygen for closed circuit SCBA equipment.
Q:
91. Explain how liquid surface area affects the requirement for automatic extinguishment facilities for dip tanks.
Q:
83. A common term used by safety engineers, safety managers, and emergency personnel is "bleve". Explain this term, what it means, and how the word is pronounced (what it rhymes with).
Q:
80. A room that measures 12'x 15'x 10' has general dilution exhaust ventilation of 1 room change per hour to prevent explosion. Calculate the maximum tolerable level of gasoline vapor leaking into the room atmosphere. State any necessary assumptions. Gasoline has the following characteristics:
FLASH POINT: -40OF
BOILING POINT: 36.1OC
LEL: 1.5%
UEL: 7.8%
VAPOR DENSITY: 2.48
Q:
79. Calculate the amount of general exhaust ventilation (in room changes per hour) needed to control (prevent explosion) a general release of gasoline vapors of 4 cubic feet per minute in a room that measures 12'x 15'x 10'. State any necessary assumptions. Gasoline has the following characteristics:
FLASH POINT: -40OF
BOILING POINT: 36.1OC
LEL: 1.5%
UEL: 7.8%
VAPOR DENSITY: 2.48
Q:
75 If the temperature of a liquid is too low for a fire to be sustained on the top of the liquid, then you know thata. the temperature is below the flash point but above the firepointb. the temperature is below the firepoint but above the flash pointc. the temperature is below both the flash point and the firepointd. the temperature is below the firepointe. b and d abovef. none of the above