3-4-11
To locate a cable using a typical cable locator, a ? . a.high current impulse is induced b.high voltage pulse inductor can be used c.lead wire is laid on top of the ground in the general direction of the cable d.receiver with a directional antenna is swept from side to side
d.receiver with a directional antenna is swept from side to side
Moisture can enter where the cable is cut during installation or during storage and cause premature failure due to ? . a.bi-metal interaction b.corrosive etching c.excessive jacket corrosion d.water treeing
d.water treeing
Semi-conducting tape must not touch the conductor when making a splice. Select one: True False
False
When a cable jacket is applied over the metallic shield, it is used to provide an improved return path (neutral) for extra conductivity. Select one: True False
False
A cable needs to be taken out of service using a lockout/tagout process in order to use the transmitter of a typical cable locator. Select one: True False
True
A pressure point on the cable from a rock pushing against it may cause an eventual cable failure. Select one: True False
True
Cables are put in conduit or in an envelope of sand to prevent any sharp pressure against the cable. Select one: True False
True
The metallic shield of a cable can serve as a path for the return current (neutral) and fault current. Select one: True False
True
When splicing a cable, the cable is reconstructed so a conductor shield, an insulation shield, a neutral, and a jacket are all installed in a manner so there will be no added concentration of electrical stress on the insulation. Select one: True False
True
When pulling cable into a conduit, the overriding concern is to maintain the integrity of the ? . a.cable b.circuit ground connection c.manhole accessibility d.pulling rope
a.cable
It is hazardous to touch a cable after a high voltage test has been completed because a cable is basically a ? and will have voltage on it after a high voltage test is completed. a.capacitor b.neutral conductor c.rheostat d.transformer
a.capacitor
An eventual cable failure can be caused by ? . a.excessive tension when pulling the cable into the conduit b.excessive vehicle traffic c.nominal voltages being applied d.the conduit being submerged in water
a.excessive tension when pulling the cable into the conduit
If digging is required near energized cables, ? . a.a backhoe is used within 2' of the cable b.customer load must be taken off the circuit c.digging must be by hand or with a sucker truck d.the cables must first be deenergized
c.digging must be by hand or with a sucker truck
If the electric field becomes concentrated in any one point of a cable insulation, the electrical stress in that location will lead to ? . a.a corona discharge b.creepage c.eventual insulation failure d.water treeing
c.eventual insulation failure
A method that will help keep a pull within the tension limits of the cable is to ? . a.attach a rope with a smaller WLL than the cable before the pulling unit b.have good radio communication between the wire reel and truck c.install a weak link at the pulling eye to act as a mechanical fuse d.use a large pulley at the pulling end
c.install a weak link at the pulling eye to act as a mechanical fuse
When making splices or terminations, any damage done while stripping the insulation shield from the insulating layer could result in a phenomenon called ? , which could eventually damage the cable. a.current backflow b.electrostatic discharge c.partial discharge d.water treeing
c.partial discharge
A splice kit specification describes the sleeve, dies, and ? that should be used on a splice joint. a.lubricant b.nonmetallic abrasive c.press d.type of file
c.press
A layer of ? on the inside and outside of the insulation spreads the electric field uniformly. a.#33 tape b.insulating material c.semi-conducting material d.silicon tape
c.semi-conducting material
