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level 2 C #2
firestopping, media and connectors, cable pulling
| Question | Answer |
|---|---|
| Underwriter's Laboratories is an example of a _______ ______ ______ _______ | NRTL Nationally Recognized Testing Laboratory |
| The pressure of water used in a hose stream test is | 45psi (310 Kilopascals) |
| An 'F3' rating means a barrier will : | prevent flame breaking thru for 3 hours |
| A 'T2' ratingcludes the specs for an 'F2' rating (T/F) in | True, plus limits temperature rise. |
| An endothermic material does what when exposed to heat from a fire? | absorbs it |
| An intumescent material does what when exposed to high heat? | swells |
| A material that , when exposed to high call heat, forms a hard char ised | ablative |
| Firestopping putties, once installed , must never be disturbed (T/F) | False. Most putties can be re-entered, so long as conduit fill capacity is not exceeded. |
| Describe a cementitious material | cement-like; mortar-like |
| Must a sleeve always be used when penetrating a fire stop barrier with cable? | No, but it is usually desirable. |
| May you use plenum rated cable in a riser? | yes, but not the other way around |
| What is the bandwidth (frequency rating) of cat 5e cable? | 100MHz |
| What is the bandwidth (frequency rating) of cat 6 cable? | 250MHz |
| What is the bandwidth (frequency rating) of cat 6a cable? | 500 MHz |
| What is the maximum number of different color pairs in any size copper cable? | 25 |
| In an 8P8C connector, on which pins does the wh/blu pair go? | pins 4 & 5, always |
| What is the recommended max length of undercarpet cable? | 10m (33 ft) |
| What is the characteristic impedance, in ohms, of 4-pair balanced cable? | 100 ohms |
| An 'F' connector is used on what type of cable? | coaxial |
| What is the other name for an 8P8C connector? | RJ-45 |
| The maximum pulling tension of 4-pair UTP cable is | 111 newtons (25 lbs) |
| What is the minimum bend radius of 4-pair cable? | 4 times the radius |
| What holds a cable reel off the floor? | jackstand |
| J-hooks should be space how far apart? | 4 to 5 feet |
| What special device is used when pulling backbone from the bottom up? | winch |
| When dropping a backbone down a building, you will need a ______ ______. | cable brake |
Created by:
bravomack
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