Cdc 3E451A Volume 4. Special Systems Updated Actual Questions And Correct Answers

CDC 3E451A VOLUME 4. SPECIAL SYSTEMS UPDATED
ACTUAL QUESTIONS AND CORRECT ANSWERS

Question:
1. (601) What type of fire suppression system has closed
heads, is f ull of water, and is under pressure at all times?

Answer:
Wet pipe.

Question:
2. (601) In a wet-pipe sprinkler system, what causes the
clapper valve to open?

Answer:
One or more heads opening.

Question:
3. (601) What is the first step in restoring a wet-pipe
sprinkler system?

Answer:
Replace damaged heads.

Question:
4. (601) When restoring a wet-pipe sprinkler system, any
trapped air can be bled off by

Answer:
using the inspector's test valve.

Question:
5. (601) What should you do if false alarms are being caused
by pressure surges?

Answer:
Relieve trapped air pressure.

Question:
6. (602) What are the two types of quick-opening devices in
a large dry-pipe system?

Answer:
Accelerators and exhausters.

, Question:
7. (602) How long should it take to recharge a dry-pipe
system during restoration?

Answer:
30 minutes

Question:
8. (602) When inspecting a dry-pipe sprinkler system,
record and compare to previous readings the air and
water pressures and

Answer:
temperature.

Question:
9. (602) How do you correct occasional trips in dry-pipe
systems caused by water surges?

Answer:
Increase air pressure.

Question:
10. (603) What type of fire suppression system has open
sprinkler heads, and the system piping is under
surrounding atmospheric pressure?

Answer:
Deluge

Question:
11. (603) What are the two possible positions of the
differential deluge valve?

Answer:
Standby and fire.

Question:
12. (603) What is used to test heat-actuated devices (HAD) in
an explosive atmosphere?

Answer:
Hot water or hot cloth.