PTAC 1308 Exam 2 UPDATED Exam Questions and CORRECT Answers
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Course
PTAC 1308
Institution
PTAC 1308
PTAC 1308 Exam 2 UPDATED Exam
Questions and CORRECT Answers
kills the majority of people caught in a fire. - Correct Answer- Asphyxiation
Class B fire - Correct Answer- Flammable liquids and gases
Class C fire - Correct Answer- Electrical
Class A fire - Correct Answer- Wood, paper, plastic, e...
PTAC 1308 Exam 2 UPDATED Exam
Questions and CORRECT Answers
kills the majority of people caught in a fire. - Correct Answer- Asphyxiation
Class B fire - Correct Answer- Flammable liquids and gases
Class C fire - Correct Answer- Electrical
Class A fire - Correct Answer- Wood, paper, plastic, etc.
Explain why water cannot be used to fight a fire on a substance that is lighter than
water. - Correct Answer- Most flammable liquids are lighter than water.
Water floats the burning fuel and spreads it wherever the water flows.
is the most common fire extinguishant because it is generally available,
low in cost, and effective - Correct Answer- Water
suppress fires by cooling, blanketing, and sealing off the burning fuel
from the atmosphere - Correct Answer- Foams
The most common gas extinguishant is - Correct Answer- Carbon dioxide
(T/F) All portable fire extinguishers are filled with the same firefighting material. - Correct
Answer- False
Three ways boilers are protected from over pressurization are by - Correct Answer- Fusible
plugs
Low water shutoff devices
Pressure release valves
, The weakest point on a compressed air or nitrogen cylinder is the - Correct Answer- Cylinder
valve
A "" is a deliberate weak area of a building wall that releases pressure
through that panel rather than allow a whole building to explode. - Correct Answer- Blow out
panel
is caused by a sudden stoppage of liquid flow that creates a lot of
pressure. - Correct Answer- Water Hammer
(T/F) Draining an unvented storage tank may collapse the tank. - Correct Answer- True
A gallon of water converted to steam would occupy "" times the space. - Correct Answer-
1600
Explain why steam is commonly used as an inert gas for purging vessels and lines. - Correct
Answer- Steam is not combustible and does not support combustion.
During unit shutdown, steam condensing on vessel surfaces helps to clean vessels and lines
as well as to displace gaseous and liquid hydrocarbons before the equipment is opened.
Steam is readily available in refineries and is usually cheaper than other inert gases, which
makes it very desirable for a purging or blanketing medium.
(T/F) Steam is combustible - Correct Answer- False
(T/F) A stream of high pressure gas can cut like a knife blade - Correct Answer- True
means connecting two objects together with metal - Correct Answer- Bonding
consists of connecting an object to the earth with a metal rod driven into the earth - Correct
Answer- Grounding
The unit of measurement for the level of sound is the - Correct Answer- Decibel
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