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Terms in this set (181)
Proper use of a wedge socket
Tail lies underneath
The maximum included angle for hooks with a row sling rigging is ?
When inspecting hardware, a reduction of ? Or more in any specified dimension should cause the hardware to be removed from service.
Proper installation of u bolts is ?
Nuts facing down
The efficiency of a wire rope in a wedge socket is higher than a swage socket.
When making an eye in a wire rope, the first u bolt clip is at the end of the thimble and the second is placed near the end of the turnback.
The strongest type of permanent eye that can be put on a wire rope is with a ? Splice and pressed metal sleeve.
To keep the shape of the eye intact and prevent the eye of the rope from wearing, ? Are used in the eyes.
The wire rope clip that is farthest from the eye gets the most vibration and is usually the first to loosen.
The most common shackle shapes are the anchor and the ? Types.
The ? Section of a shackle determines its size raiding.
The use of a ? Would provide a larger connection for joining multiple slings or shackles where the opening of a hook is limited.
All hooks shall be equipped with ?.
When using wire rope clips, it should be assembled with the u bolt in contact with the dead end of the wire and the saddle in contact with the live end.
In the vertical position, the shackle can carry ? Of its rated load.
If a load needs different length slings, the use of ? May be required.
The use of a ? Type shackle cannot be used for most lifting type applications.
Eyes must be facing ? With the load.
The exposed dead end section in a wedge socket must extend out a minimum of ? Rope diameters.
A shim or a washer can be used to adjust the orientation of an eye bolt so that the lifting force remains in the plane of the eye.
Spreader beams must have a load test of ? Of the the WLL applied to the beam after construction.
Spreader beams help ?.
Eliminate the load from buckling
Equalizer beams are usually used on ? Hoist lines to make tandem lifts and equalize the load on sling legs.
A pole with out guy support can only support ? Loads.
A wire running from the top of one pole to the top of an adjacent pole is called a ? Guy.
A ? Guy consists of a wire running from the attachment near the top of the pole to an anchor installed in the ground.
A ? Guy is used to span across a sidewalk.
A ? Is used where a down guy or span guy is not feasible.
Push pull brace
Where an anchor and a guy would interfere with traffic or otherwise be in the way, a ? Guy is used.
When a pole is supporting a line making a 3 degree to 60 degree corner, the anchor is placed so that it ? The corner angle.
When a pole is supporting a line making it more than a 60 degree corner, the anchors are placed so that the conductors are deadended in each direction.
A ? Guy may be installed on a pole with a steep grade.
Arm guys are used where ? Pull on a cross arm exists.
Storm guys installed to prevent cascading pole failures consist of ? Guys.
Guy wire made of 3/8 inch high strength steel has allowable tension strength of ?.
A pole specifically installed to anchor a span guy is called a ? Pole.
The tension on a guy decreases as the lead guy length decreases.
The height of the ? Above the ground is one of the three factors that need to be considered when buying a pole line.
The bisect tension of a conductor on a corner needs to be known before the tension on a down guy can be calculated.
The bisect tension of a conductor exerted on a 60 degree corner pole is equal to lone tension.
The strength of a guy needed for a job can be calculated by a qualified electrical worker in the field with the aid of a simple formula
The rule of thumb that can be used to predetermine the length of steel needed when making up a guy is to add the height of the guy attachment above the ground, plus ? Of the distance from the pole to the anchor.
A porcelain guy strain insulator is strong enough to hold the high tension of a guy under load because the two holes at right angles overlap each other, so that the porcelain is under compression.
It is a good practice to wrap tape around the guy wire on each side of the cutting point to keep the strands from ?.
Fraying or unlaying
When working in the vicinity of a live circuit, it is necessary to secure the wire on both sides of the cut when cutting guy wire to prevent the springy wire from making electrical contact.
The best practice when installing guy wires is to wait until the conductors are sagged, and then pull the pole back with the guy, to it's finished position.
A ? Should be used to support the pole in order to safely re pull a loaded down guy.
When a guy is installed, the dead end and corner poles are typically pulled over 1 to 1.5 feet from plumb.
A porcelain guy strain insulator is normally installed ? Above the ground, above the reach of people on the ground.
Three types of material from which guy strain insulator is made is manufactured porcelain, fiberglass, and ?.
Guy guards or markers are essential to keep down guys ?.
Visible so the public can avoid contact
Guy wires can be secured with ? Or preformed grips.
Three bolt clamps
A guy wire is pulled up or tightened by means of a hoist and ? Grip meant for steel.
If a guy is not exposed to a car or pedestrian traffic, a guy guard should still be installed.
A ? Hoist is the most suitable hoist for pulling a guy.
Installing a three bolt clamp to a guy wire ensures that there will be no loss of tension when the hoist is released.
When there is more than one guy installed on the same side of a pole, the top guy must be tensioned higher to carry the extra load.
Some electrical providers require guys to be bonded together and grounded to ?
Reduce stray electrical current and corrosion
Two factors that govern the type of anchor to be chosen for a job are the type of load to be anchored and the ?.
The log anchor is often referred to as a ? Or slug anchor.
An expansion anchor is also called a ? Anchor.
A PISA anchor is called a ? Type anchor.
? Type anchors are preferred when soil conditions will hold the anchor and rocks are not a problem during the installation.
When an anchor is installed in deep, sandy, or swampy soil, anchor rod extensions are used to get to firm soil.
A ? Anchor is installed so that the boom will follow the anchor as it is screwed into the ground in order to maintain proper alignment and down pressure.
There are three types of anchors used in solid rock: expanding rock, rock eye, and ? Anchors.
All anchors, other than those in solid rock, depend on ?.
Undisturbed soil for holding power
The hole for a slug anchor is dig out at an angle so that the rod and anchor can be angled towards the pole.
The anchor rod of a plate anchor should be cut into the soil so that it angles towards the pole to be guyed, so the anchor will pull against the pole in undisturbed soil.
The hole for a expanding anchor should be ? The anchor after expansion.
Each helix of a double helix anchor acts as a separate ? For more holding power.
A screw anchor is screwed into the ground by a means of a special ? And the power drive on a line truck or digger.
An ? Anchor is fully spread when the hollow sound of the first blow changes to a dull thud.
A power installed screw anchor is installed by a machine and causes very little soil disturbance.
An anchor rod may be below grade level if an anchor rod extension is not available and the guy is finished off before backfilling.
Anchor rods vary form 1/2 inch to ? In diameter.
One and 1/4
Anchor rods vary in length from 3 1/2 feet to ?.
Testing an anchor ensures the anchor will not be subjected to electrolysis.
If the lead distance for an anchor is too short for the load to be applied, one possible engineering solution is to install a heavier class pole.
After installation, an anchor rod should be left at least ? Out of the ground.
Every electrical circuit needs a conductor.
The selection of a conductor is based on the ? Requirements of the circuit.
Ampacity and voltage
The larger the diameter of the conductor, the greater the amount of line loss.
On overhead line construction, large diameter conductors allow ?.
More ice buildup
The voltage of an underground cable is based on the properties of the ? Material.
Before making a splice, the conductor size should be confirmed with a ? To a avoid using the wrong sleeve or connector.
A 1/0 conductor is larger than a 3/0 conductor.
A 6 AWG conductor is smaller than a 4 AWG conductor.
A 336 kcmil conductor is larger than 795 kcmil conductor.
The conductivity of aluminum is about ? That of copper.
The preferred material for over head conductor is ?.
Bare overhead conductors are chosen as a compromise between a conductors tensile strength and it's conductivity. There are ? Properties an engineer would look at when choosing a conductor.
In overhead line construction, aluminum conductor steel reinforced is known by the letters ACSR.
Each 336 kcmil ACSR conductor is the same diameter as every other 336 kcmil conductor.
All aluminum conductor (AAC) is typically strung where high ? Resistance is required.
One advantage an ACSR conductor has over ACC conductor is that it ?.
Allows for longer spans
One advantage of aluminum composite conductor reinforced (ACCR) over ACSR is that composite wire provides strength at about ? The weight.
Aluminum weld (AW) conductors have the strength of steel with the conductivity and corrosion resistance of ?.
Situations where an aluminum weld conductor might be used as an overhead ground wire, as a wire in corrosive areas, and as a ? Wire.
There is a copper weld conductor similar to the aluminum weld conductor, except that the steel is clad with copper.
From a working point of view, a qualified electrical worker must treat weatherproof covered conductors as though they are bare and uninsulated.
Aluminum conductors must be cleaned before splicing or making a connection to ensure a ? Connection.
If the pole is framed from the ground, the ? Should not be installed if the pole is to be installed in an energized circuit.
When material and equipment are installed on a pole, bolts should be installed so that the head of the bolt carried the heavy weight.
Wooden arms are made mainly of two types of wood: pine and ?.
Wood and fiberglass cross arms have an electrical advantage because of their ?.
When framing a pole, ? Is one of the considerations.
The purpose of side or alley arms is to clear ?.
Buildings and trees
Double arms are typically used to handle heavy weights, corners, and ?.
Steel pins have lead threads to prevent ? On the insulator.
The cross arm on a steel tower is called a ?.
Some utilities use wooden braces because the insulating value of the wood is considered safer for qualified electrical workers.
A lag screw should be driven in with a hammer to about ? From the right position, and then seated with three or four turns with a wrench.
A cross arm should be sent up to a worker on a pole with the hand line wrapped and hooked around the cross arm below the center. Using the bright of the wrote above the hook, a half hitch is used around an insulator pin to allow the cross arm to go up straight.
According to this lesson, ? On a pole can often cause television and radio interference.
the ground man should stand well to the side when pulling up material to a worker in the pole.
Angle iron braces are fitted to the ? Of the cross arm.
Conductors on overhead lines are electrically insulated from the ground by either resting on insulators or being ?.
Suspended from insulators
There's materials used for overhead line insulators are porcelain, polymer, and ?.
If three phases and a neutral are mounted on a cross arm, the neutral can be identified as the one mounted on a ?.
A combination of diet and moisture will cause insulators to flash over; ? Is also a likely cause.
The glaze on a porcelain insulator helps the insulators surface shed dirt and bead water.
pin type insulators can be two or more pieces cemented together.
A one piece insulator can withstand a higher voltage than a two piece insulator.
Hand wire ties or ? Ties are used to fasten a conductor on most top tie insulators.
Each disk of a porcelain or glass insulator is rated at ?.
A porcelain suspension insulator uses a ball and socket design which puts the insulating material under ? To create strength.
One piece porcelain pin type insulators are used on lines where the voltages are less than ?.
A polymer suspension insulator cannot withstand the tension of deadened conductors.
Pin insulators are no longer used on transmission lines.
1 kip equals ? Lbs
Post insulators are positioned on a pole to support conductors in a vertical or horizontal ? Position.
Post insulators are most likely to be found when the line is built on a ? Or along a highway.
Narrow right of way
When hoisting a long string of insulators, care should be taken not to ? Because it can damage the ball, socket, and cotter keys.
Excessively bend the string
Polymer insulators are lightweight but do not maintain high dielectric or mechanical strength
A 69 kV line will have ? Insulators.
4 or 5
It is acceptable to climb down a polymer insulator to the conductor level on a transmission line.
240 kV line will have ? Insulators.
The diameter of a suspension porcelain insulator disks varies from 3 3/8 to ?.
A series circuit has more than one current path.
Resistance in a circuit opposes current flow
The unit of measure of resistance is the ?.
Two general types of resistors are fixed and variable.
What type of resistor has a moveable clamp that allows the user to select an exact resistance value?
A resistor with a lovable contact switch is adjusted by Turing a shaft is called a ? Resistor.
When measuring resistance in a circuit power must be removed from the circuit.
If only two leads are used on a variable resistor, it is called a ?.
When all three leads are used on a variable resistor, it is called a ?.
To find the resistance of all the resistors in a series circuit, their values are?
A meter designed to measure resistance is called a ?
Ohms law states it takes one volt to push one amp through one ?.
In a DC circuit, the current is inversely proportional to the voltage and directly proportional to the resistance.
A two lead variable resistor used to adjust current is called a ?.
A variable resistor wired as a potentiometer has three leads.
The ? Is the same at any point of series circuit.
Subscripts allow precise communication about various components of a circuit.
Since there is only one path in a series circuit, the same current must flow through every component.
An increase in the total resistance of a cir cubit would cause an increase in the current in that circuit.
Decreasing applied voltage would cause current to increase.
In order to measure current, the ? Must be placed in series with the component.
The current in a series circuit will decrease as it passes trough each resistor.
A voltage ? Can be used to break down a supply voltage into smaller voltages.
The amount of vantage drop across a the resistor will be directly proportional to its resistance and the the circuit current.
In a series circuit, the total voltage dropped across all the loads is equal to the?
When two batteries are connected as a series additive power source, they produce a voltage that is greater than either of the batteries connected separately.
In a series additive power source, the ? Is equal to the sum of the individual voltages.
When two batteries are connected as a series add omg power source, the positive terminal of one battery is connected to the positive terminal of the other battery.
An increase in current throughout a resistor will result in a decrease in voltage drop across the resistor.
In a series circuit, loads that have the same ? will have the same resistance values.
Voltage dropped across them
To find voltage applied across a series circuit using two series opposing powers sources is ?.
Larger E minus smaller E
The ? Is a unit of energy used to measure the heat or work produced or consumed in a system.
What is a self dampening wire?
ACSS & ACSR
Math question in parentheses is what type of question?
If you raise current what else will change?
Power (series) / Voltage is affected
In an additive battery the terminals are connected positive to negative and you ? The voltages.
In a subtractive battery the terminals are hooked up negative to negative and positive to positive and you ? The voltages.
How to determine length of guy wire needed?
Length of pole plus 1/2 distance from the pole to anchor
Down guy tension formula ( need to use Pythagoras to find guy length first)
Line tension T x length of guy L divided by distance to the anchor
Pathagoras for length of guy
Square root of distance to the anchor D squared plus the height of the guy squared
how many ft are in a mile
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