PMT 108 Principles of Water Chapter 5
all 64 questions with Actual answers.
PMT 108 Principles of Water Chapter 5
all 64 questions with Actual answers.
Which of the following statements about the freezing point of water is MOST accurate? (167)
A. Below 32°F (0°C), water converts to a solid state of matter.
B. Below 40°F (4°C), water is able to convert to a solid state of matter.
C. Water will not freeze until ambient temperature and surface water temperature are the same.
D. Water will not freeze until surface water temperature is lower than ambient temperature. - ANSWER
A
When water converts to a gas, water vapor, or steam, the water: (167)
A. immediately dissipates so it is rarely visible.
B. changes to droplets that will fall back to the surface.
C. only becomes visible if the ambient air temperature is above 40°F (4°C).
D. only becomes visible as it rises away from the surface of the liquid and begins to condense. - ANSWER
D
Which of the following statements about properties of water is MOST accurate? (167)
A. Water is compressible only in a vacuum.
B. Water is considered to be virtually incompressible.
C. Water is compressible only at very low temperatures.
D. Water is compressible only at very high temperatures. - ANSWER B
For fire protection purposes, ordinary fresh water is considered to weigh: (167)
A. 5.5 lb/gal (.66 kg/L).
B. 8.3 lb/gal (1 kg/L).
C. 10.2 lb/gal (1.2 kg/L).
D. 12 lb/gal (1.5 kg/L). - ANSWER B
, PMT 108 Principles of Water Chapter 5
all 64 questions with Actual answers.
Water may be used to smother fires in a combustible liquid: (168)
A. when the liquid's specific gravity is higher than 1.
B. when the liquid's specific gravity is less than than 1.
C. when the ambient air temperature is below 32°F (0°C).
D. when the ambient air temperature is above 32°F (0°C). - ANSWER A
When water converts to steam within a closed space, the fire: (168)
A. may react with the steam violently.
B. may be extinguished by smothering.
C. will become larger and more difficult to extinguish.
D. will stay in the incipient stage until it is extinguished. - ANSWER B
Which of the following is a characteristic of water? (169)
A. Its heat-absorbing capacity is greatest when paired with other extinguishing agents.
B. Its heat-absorbing capacity is reduced when paired with other extinguishing agents.
C. It has lower heat-absorbing capacity than other common extinguishing agents.
D. It has greater heat-absorbing capacity than other common extinguishing agents. - ANSWER D
At 212°F (100°C), water converted to steam occupies approximately: (169)
A. 20 times its original volume.
B. 100 times its original volume.
C. 1,200 times its original volume.
D. 1,700 times its original volume. - ANSWER D
Which of the following statements about water as an extinguishing agent is MOST accurate? (169)
A. Generally, it is an expensive but readily available commodity.
all 64 questions with Actual answers.
PMT 108 Principles of Water Chapter 5
all 64 questions with Actual answers.
Which of the following statements about the freezing point of water is MOST accurate? (167)
A. Below 32°F (0°C), water converts to a solid state of matter.
B. Below 40°F (4°C), water is able to convert to a solid state of matter.
C. Water will not freeze until ambient temperature and surface water temperature are the same.
D. Water will not freeze until surface water temperature is lower than ambient temperature. - ANSWER
A
When water converts to a gas, water vapor, or steam, the water: (167)
A. immediately dissipates so it is rarely visible.
B. changes to droplets that will fall back to the surface.
C. only becomes visible if the ambient air temperature is above 40°F (4°C).
D. only becomes visible as it rises away from the surface of the liquid and begins to condense. - ANSWER
D
Which of the following statements about properties of water is MOST accurate? (167)
A. Water is compressible only in a vacuum.
B. Water is considered to be virtually incompressible.
C. Water is compressible only at very low temperatures.
D. Water is compressible only at very high temperatures. - ANSWER B
For fire protection purposes, ordinary fresh water is considered to weigh: (167)
A. 5.5 lb/gal (.66 kg/L).
B. 8.3 lb/gal (1 kg/L).
C. 10.2 lb/gal (1.2 kg/L).
D. 12 lb/gal (1.5 kg/L). - ANSWER B
, PMT 108 Principles of Water Chapter 5
all 64 questions with Actual answers.
Water may be used to smother fires in a combustible liquid: (168)
A. when the liquid's specific gravity is higher than 1.
B. when the liquid's specific gravity is less than than 1.
C. when the ambient air temperature is below 32°F (0°C).
D. when the ambient air temperature is above 32°F (0°C). - ANSWER A
When water converts to steam within a closed space, the fire: (168)
A. may react with the steam violently.
B. may be extinguished by smothering.
C. will become larger and more difficult to extinguish.
D. will stay in the incipient stage until it is extinguished. - ANSWER B
Which of the following is a characteristic of water? (169)
A. Its heat-absorbing capacity is greatest when paired with other extinguishing agents.
B. Its heat-absorbing capacity is reduced when paired with other extinguishing agents.
C. It has lower heat-absorbing capacity than other common extinguishing agents.
D. It has greater heat-absorbing capacity than other common extinguishing agents. - ANSWER D
At 212°F (100°C), water converted to steam occupies approximately: (169)
A. 20 times its original volume.
B. 100 times its original volume.
C. 1,200 times its original volume.
D. 1,700 times its original volume. - ANSWER D
Which of the following statements about water as an extinguishing agent is MOST accurate? (169)
A. Generally, it is an expensive but readily available commodity.
