Exercise Your Knowledge of Fire Alarm Calculations

All Answers relate to NFPA 101, 2018 Edition

1. PVC must be supported at intervals not exceeding the values in table _______.
A. 24 hours and 5 minutes
B. 60 hours and 4 minutes
C. 24 hours and 15 minutes
D. 24 hours and 4 minutes
 
2. To prevent damage to conductor insulation, when pulling through PVC pipe, the maximum amount of bends between pulling points cannot be greater than __________ degrees.
A. 90
B. 180
C. 270
D. 360
 
3. PVC must be fastened to prevent movement from thermal expansion and contraction.
A. True
B. False
352.30
4. A combination household fire and burglar alarm system requires no battery calculations because the manufacturer has already set out the appropriate parameters.
A. PVC Schedule 80
B. PVC
C. EMT
D. NMT
 
5. The maximum number of 12 AWG THHN conductors permitted in trade size 1, Rigid PVC Conduit, Schedule 40 is __________.
A. 6
B. 25
C. 83
D. 11
Table C.11
6. The maximum number of 14 AWG THHN conductors permitted in trade size 1 ½, Rigid PVC Conduit, Schedule 80 is __________.
A. 28
B. 51
C. 37
D. 23
Table C.10
7. According section ___________, where conduit enters a box, fitting or other enclosure, a bushing or adapter shall be provided to protect the wire from abrasion unless the box, fitting or enclosure design provides equivalent protection.
A. 322.46
B. 352.46
C. 380.86
D. 250.12
 
8. EMT shall be permitted as an equipment grounding conductor.
A. True
B. False
358.60
9. EMT shall be made of any of the following, except ___________.
A. steel with protective coating
B. aluminum
C. stainless steel
D. iron ore composite
 
10. EMT shall be clearly and durably marked at least every _______ as required in the first sentence of 110.21(A).
A. 3 feet
B. 10 meters
C. foot
D. 10 feet
 
 
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