Answer the following statement(s) true (T) or false (F)
1. Coax cable is the most commonly used link in CCTV systems.
2. Viewing a recorded image from a digital video recorder, the picture will look jerky because
frames have been left out.
3. According to the National Electrical Code®, Coaxial cables entering buildings from
underground, can be run in the same raceway as Class 1 conductors with not separation
requirements.
4. A Vidicon camera should be used in environments where there is bright, consistent light.
5. A CCD camera can provide a full-resolution picture requiring less light than a tube camera
1. T
2. F
3. F
4. T
5. T
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Once the trench is dug, the trench width at the top of the pipe and trench depth determines the _____.
a. trench configuration b. depth of the grade stakes c. load that the pipe has to support d. trench modification
The cfm is found by: ____.
A. cfm (infiltration) = (ACH ÷ HOUSE VOLUME) × 60 min/h B. cfm (infiltration) = (ACH × HOUSE VOLUME) ÷ 60 min/h C. cfm (infiltration) = (ACH + HOUSE VOLUME) ÷ 60 min/h D. cfm (infiltration) = (ACH × HOUSE VOLUME) × 60 min/h
Hot-surface igniters typically operate on:
A) 10,000 V. B) 240 V. C) 24 V. D) 120 V.
When normally enclosed live parts are exposed for inspection or servicing, the working space, if in a passageway or general open space, shall be suitably _____.
What will be an ideal response?