SUBSTATIONS Flashcards
-2 TO THE 4TH POWER
-16
3(5X-2) = 9X-12
X=-1
ELECTROMOTIVE FORCE IS? (ELECTROMOTIVE PRESSURE)
VOLTAGE
44W VACUUM AT 110V. HOW MANY AMPS?
.4 AMPS
³√64
4
A VEHICLE GOES 240 MILES ON 8 GAL, 212 ON 7.5 AND 251 ON 8.2. WHAT IS THE AVERAGE MPG
29.6 (ADD THE MILES AND THEN ADD ALL GALLONS AND DIVIDE
WHAT ARE TEP TRANSMISSION VOLTAGES (3)?
500KV, 345KV, 138KV
WHAT ARE TEP DISTRIBUTION VOLTAGES (3)?
4KV, 13.8KV, 46KV
WHAT HEIGHT DO YOU NEED FALL PROTECTION?
6’
HOW FAST DOES ELECTRICITY TRAVEL?
186,000MPS (SPEED OF LIGHT)
WHAT UNIT OF MEASURE IS USED FOR IMPEDANCE?
OHMS
IF YOU HAVE A POLE 12” IN DIAMETER, WHAT IS THE CIRCUMFERENCE?
37.68 (2PIR, OR PI*D)
OPPOSITION TO THE FLOW OF ELECTRONS
RESISTANCE
CONVERT 44CM TO FEET GIVEN THAT 1 INCH EQUALS 2.54CM
1.44 FEET
2.45MILLIAMPS IS HOW MANY AMPS?
.00245A
4 KILOVOLTS IS HOW MANY VOLTS?
4,000
WHAT IS THE RESISTANCE OF R1?
R1=20
120V / 1.5A = R TOTAL (80), SUBTRACT R TOTAL (80) FROM R2 (60) = R1 (20)
HOW MANY DEGREES DO THE INSIDE ANGLES OF A RIGHT TRIANGLE EQUAL?
180
OHMS LAW STATES THAT CURRENT IS PROPORTIONAL TO?
VOLTAGE
OHMS LAW EXPRESSED AS?
OHMS LAW (V=IR & P=V*I)
A GUY WIRE IS ATTACHED 1’ FROM THE TOP OF A 70’ POLE THAT IS BURIED 10% OF ITS LENGHTH +2FT. THE WIRE IS ANCHORED 80 FT FROM THE BASE OF THE POLE. HOW LONG IS THE GUY WIRE?
100’
TRUCK INSPECTIONS ARE DONE?
DAILY
IF YOU INCREASE THE TURNS ON THE PRIMARY COIL OF A TRANSFORMER THE OUTPUT VOLTAGE?
DECREASES
IF YOU HAVE 109V, EACH TAP CHANGE IS THE VOLTS PLUS OR MINUS 2%, HOW MANY TAPS DO YOU NEED TO CHANGE TO BE WITHIN TEP TOLERANCE? (NO ANSWER)
NO ANSWER, STUDY MATH
WHAT TWO PARTS OF A METER MAKE UP THE ELEMENT
POTENTIAL COIL & CURRENT COIL
ACB STANDS FOR
AIR CIRCUIT BREAKER
AT WHAT VOLTAGE DO LINEMEN NEED RUBBER GLOVES?
50V
IF A MAYDA IS IN PROGRESS…?
STAY CLEAR ON THE RADIO (MAINTAIN RADIO SILENCE)
WHEN YOU ENTER A SUBSTATION YOU MUST NOTIFY
TRANSMISSIONS
PHASE TO PHASE VOLTAGE = 13.8KV, WHAT IS PHASE TO GROUND?
8KV
(Square root of 3 is 1.732)
A TEP VEHICLE MUST BE GROUNDD IF ITS WITH HOW MANY FEED OF AN ENERGIZED LINE?
10’
6 TO THE -2 POWER?
1/36
YOU MUST BE A JOURNEYMAN TO TAKE A CLEARANCE?
TRUE
WHAT 3 TYPES OF RELAYS ARE USED FOR PROTECTION?
OVERCURRENT RELAY, OVERVOLTAGE RELAY, GROUND RELAY
WHAT DOES OSHA STAND FOR
OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION
WHAT IS THE PURPOSE OF OSHA?
TO PROTECT THE WORKER/WORKER SAFETY
YOU CAN NOT BE FIRED FOR FILING A COMPLAINT AGAINST YOUR EMPLOYER?
TRUE
WHAT IS SUBTRANSMISSION VOLTAGE?
46KV
ONLY A JOURNEYMAN CAN OPERATE A MANLIFT?
FALSE
A TRAILER HOLDS 16,675LBS AND A GALLON OF OIL WEIGHS 23LBS, HOW MANY GALLONS CAN A TRAILER HOLD?
725 GALLONS
A TRANSFORMER HOLDS 480 GAL OF OIL AND YOU CAN FILTER 80GAL AN HOUR. HOW LONG DOES IT TAKE TO FILTER IT ALL?
6 HOURS
IF A TRAILER IS SWERVING YOU SHOULD?
LIGHTLY APPLY BREAKS
BEFORE OPERATING A TEP VEHICLE YOU SHOULD?
CHECK SURROUNDING AREA
THE PRIMARY INSULATORS IN A TRANSFORMER ARE MADE OF?
OIL AND PAPER
YOU HAVE TWO 60W BULBS AND ONE 40W BULB AND THEY ARE LEFT ON FOR 8 HOURS. HOW MANY KILOWATT HOURS ARE USED?
1.28KWH
MULTIPLY 860 (TWO TIMES, ONE FOR EACH BULB) =960
MULTIPLY 840=320
ADD THE TWO TOGETHER (1280) AND CONVERT TO KWH (MOVE DECIMAL)
WHAT IS THE PURPOSE OF AN OVERHEAD TRANSFORMER IN A DISTRIBUTION SYSTEM?
STEP DOWN THE VOLTAGE FROM PRIMARY TO SECONDARY/SERVICE
WORKER ___ WEAR PROTECTIVE FOOTWEAR
SHALL
DEFINE SHORT CIRCUIT
LOW RESISTANCE PATH TO SOURCE
TO TIGHTEN A BOLT YOU TURN
CLOCKWISE
REVERSE THREAD MEANS
TURN IT COUNTER CLOCKWISE TO TIGHTEN
IDENTIFY A PHILLIPS HEAD BY WHAT SYMBOL?
CROSS PATTERN
WHAT IS THE PURPOSE OF A TAILBORD?
HAZARDS ON JOB, WORK TO BE DONE (SCOPE), JOB ASSINGMENTS
THREE PARTS OF A POWER COMPANY ARE
GENERATION, TRANSMISSION, DISTRIBUTION
IT TAKES 45 MINUTS TO CLEAN ALL CONTACTS ON A BREAKER, YOU ARE ASSIGNED A SUBSTATION WITH 12 BREAKERS, HOW LONG WILL IT TAKE TO CLEAN?
9 HOURS
GUY NUMBER 1 PAINTS A HOUSE IN 5HR, GUY NUMBER 2 PAINTS THE SAME HOUSE IN 10 HOURS, HOW LONG WILL IT TAKE THEM TO PAINT IT TOGETHER?
3.33 HOURS
1/5X + 1/10X = 1 (CHECK ON THIS)
WHAT DOES A VOLT METER TEST
VOLTS
WHAT DOES AN AMP METER TEST?
CURRENT
WHAT IS THE PUPOSE OF A NEUTRAL WIRE IN A SYSTEM?
RETURN PATH FOR CURRENT TO SOURCE
4/5
IF A BULB BURNS OUT IN A STRING OF LIGHTS AND NO LIGHTS WORK WHAT KIND OF CIRCUIT?
SERIES CIRCUIT
GIVE VALUE OF 4 THOUSANTHS IN DECIMAL FORM
.004
YOU MUST INSPECT RUBBER GLOVES AND PROTECTIVE GLOVES BEFORE EACH USE
TRUE