2-2-10
A popsicle stick connector is a(n) ? terminal connector that is squeezed onto the end of the wire and inserted into the secondary terminals of a transformer. Select one: a.aluminum b.braided c.pin d.spade
C. Pin
If a transformer was ordered 24,940 Grd Y/14,400, the transformer would have ? insulation at the H2 end. Select one: a.more b.no c.reduced d.rubber
C. reduced
While conducting a pre-installation check on a transformer, do not ? unless permission is granted by the employer. Select one: a.check primary bushings for cracks b.check the grounding lug c.check the grounding strap d.remove the lid
D. Remove the lid
According to industry standards, all distribution transformers above 200 kVA and/or 8,600 volts are ? . Select one: a.additive b.referred to as substation class c.special ordered d.subtractive
D. Subtractive
A transformer with reduced insulation at H2 must have H2 tied to the ? . Select one: a.pole ground b.primary lightning arrestor c.secondary X2 bushing d.system neutral
D. System neutral
On a transformer with basket terminals, copper leads should be inserted from the ? . Select one: a.bottom b.middle c.side d.top
D. Top
Aluminum triplex itself can be inserted in the transformer lugs. Select one: True False
False
If the secondary voltage is listed on a transformer as 120/240 or 240/120, it makes no difference, as both internal secondary coils can be connected in parallel or series. Select one: True False
False
In order for a single-phase transformer to produce any secondary voltage, the X2 grounding strap must be in place. Select one: True False
False
It is good practice to leave an extra length of copper or to curl primary risers from the transformer to the live line in case the lead breaks. Select one: True False
False
OSHA has no requirements concerning how to hook up and lift a load. Select one: True False
False
Transformers on the loading dock can be relied on, so checking the winding continuity of a transformer is not important. Select one: True False
False
If a transformer nameplate shows 14,400/24,940 Y, it is suitable for a delta connection because it has full insulation ? . Select one: a.at the H2 b.at the tank ground c.on the secondary d.on the X2
a.at the H2
One requirement of the 1996 Migratory Bird Treaty Act regarding new transformer installations to protect birds from electrocution is to ? . Select one: a.install bushing covers b.install cross arm covers c.post warning signs d.use only fiberglass insulator pins
a.install bushing covers
A CSP transformer contains a(n) ? and a ? breaker. Select one: a.external primary lightning arrestor / secondary b.internal HV fuse / secondary c.internal secondary fuse / primary d.lightning arrestor / primary
b.internal HV fuse / secondary
The proper way to hang a small distribution transformer when power equipment is not available is ? . Select one: a.to use a handline on the crossarm b.to use rope blocks, a pole jib, and a sling c.with a bull line and pickup d.with a handline and pickup
b.to use rope blocks, a pole jib, and a sling
One factor that affects the mass that may be attached to a pole is the ? . Select one: a.anticipated ice loading b.attachment point for the equipment c.class of the pole itself d.prevailing wind direction
c.class of the pole itself
On a fully loaded 25 kVA transformer, the drop leads would normally be ? stranded copper. Select one: a.#4 b.#2 c.2/0 d.3/0
B. #2
Another requirement of the 1996 Migratory Bird Treaty Act regarding new transformer installations to protect birds from electrocution is to install ? . Select one: a.a line hose at each transformer installation b.insulated transformer leads c.only CSP transformers d.only triplex service wires
B. Insulated transformer leads
If more than one popsicle stick connector is to be installed in a basket type transformer terminal, ? leads should be brought out to connect the services. Select one: a.copper b.insulated c.solid d.stranded
A. Copper
