SLTC FINAL PAPER 2025/2026 QUESTIONS AND SOLUTION
RATED A+
✔✔A SINE WAVE HAS A VALUE OF 0 HOW MANY TIMES - ✔✔3
0/180/360
✔✔FREQUENCY IS MEASURED IN - ✔✔HERTZ
✔✔DEGREE IN SEPARATION BETWEEN EACH PHASE - ✔✔120
✔✔NUMBER OF TIMES A SINE WAVE PATTERN OCCURS IN ONE SECOND IS
KNOWN AS - ✔✔FREQUENCY
✔✔RMS IS FOUND BY MULTIPLYING THE PEAK AMPLITUDE BY - ✔✔O.707
0.707XPEAK
✔✔HOW MANY WIRES IN A DELTA SYSTEM - ✔✔3
NO NUETRAL
DELTA NEEDS HELP
✔✔HOW MANY WIRES IN A WYE SYSTEM - ✔✔4
WITH NUETRAL
WYE STANDS ALONE
✔✔ELECTRICAL CIRCUITS REQUIRE WHAT THREE ELEMENTS TO FUNCTION
PROPERLY - ✔✔1. VOLTAGE SOURCE
2. CONDUCTOR
3.LOAD
✔✔ANYTHING CONNECT DIRECTLY ACROSS TWO POINTS OF DIFFERENT
POTENTIAL IS SAID TO BE WHAT - ✔✔IN SERIES
✔✔FOUR BASIC RULES FOR SERIES CIRCUIT - ✔✔1. AMOUNT OF CURRENT
FLOWING IS THE SAME
I IS THE CONSTANT
2.SUM OF THE INDIVIDUAL SOURCE VOLTAGES
E+E+E=E
3.SUM OF INDIVIDUAL RESISTANCES
R+R+R=R
4.SUM OF POWER
P+P+P=P
✔✔SERIES CIRCUIT - ✔✔SINGLE CURRENT PATH
,✔✔PARALLEL CIRCUIT - ✔✔CONTAIN TWO OR MORE PATHS THROUGH WHICH
CURRENT CAN FLOW
✔✔FOUR BASIC RULES FOR PARALLEL CIRCUIT - ✔✔1.VOLTAGE IS EQUAL OR
CONSTANT
E IS CONSTANT
2.SUM OF CURRENT THROUGH EACH LEGS
I+I+I=I
3.TOTAL RESISTANCE IN A CIRCUIT MUST ALWAYS BE LESS THAN THE
LOWEST VALUE RESISTOR
1/R+1/R+1/R=1/R (USE THE 1/X BUTTON ON THE CALCULATOR)
4.SUM OF POWER IN EACH LEG
P+P+P=P
✔✔MOST COMMON CIRCUIT OF INTERIOR WIRING - ✔✔COMBINATION CIRCUIT
ALSO KNOWN AS SERIES-PARALLEL
✔✔THE POWER SYSTEM CONSISTS OF FOUR BASIC "SUB-STATIONS" -
✔✔GENERATION, TRANSMISSION, SUBSTATIONS, DISTRIBUTION
✔✔WHERE IS GENERATION FACILITIES USUALLY LOCATED - ✔✔LONG
DISTANCES FROM THE CUSTOMERS
✔✔MOST COMMON GOAL OF GENERATION FACILITIES - ✔✔GENERATE
ELECTIRCAL POWER AS EFFICIENTLY AS POSSIBLE
✔✔TO TURN GENERATORS WHICH PRODUCES ELECTRICITY YOU FIRST HAVE
TO CONVERT WHAT TO MECHANICAL POWER - ✔✔COAL, OIL, GAS, STEAM,
WATER, OR ATOMS
✔✔GENERATORS TYPICALLY USE ENERGY FROM - ✔✔STEAM, WATER
PRESSURE, COMBUSTION ENGINE, COMBUSTION TURBINE, WIND,
COGENERATION, BIOMASS, RESOURCE RECOVERY
✔✔3 MOST COMMON METHODS OF GENERATION - ✔✔FOSSIL, HYDRO,
NUCLEAR
✔✔ELECTRICITY IS TYPICALLY GENERATED IN RANGE FROM - ✔✔13,800 TO
24,000 VOLTS
✔✔IN THE US, POWER IS GENERATED AT - ✔✔60 Hz
✔✔OTHER PARTS OF THE WORLD, POWER IS GENRATED AT - ✔✔50 Hz
, ✔✔WHAT IS BURNED IN THE STEAM GENERATOR AND THE HEAT PRODUCES
HIGH-PRESSURE STEAM - ✔✔FUEL
✔✔WHAT HAS HISTORICALLY SUPPLIED MOST OF THE WORLD'S ENERGY -
✔✔FOSSIL FUELS
✔✔IN HYDRO PLANTS, ELECTRIC POWER IS GENERATED BY WHAT - ✔✔WATER
FLOWING THROUGH A TURBINE
✔✔ADVANTAGES OF HYDROELECTRIC GENERATION - ✔✔LOW OPERATING
COST, HIGH PRODUCTION CAPABILITY, A RENEWABLE RESOURCE, DOES NOT
REQUIRE ANY FUEL
✔✔DISADVANTAGES OF HYDROELECTRIC GENERATION - ✔✔USUALLY
LOCATED FAR FROM THE LOAD CENTERS, COST TO CONSTRUCT, LAND LOST
TO BACKWATER, IMPACT ON WILDLIFE
✔✔WHAT PERCENTAGE OF TODAYS ENERGY IS PRODUCED BY NUCLEAR
GENERATION - ✔✔20%
✔✔GEOTHERMAL GENERATION IS PRODUCTED - ✔✔USING THE HEAT OF THE
EARTH TO PRODUCE STEAM NEAR THE SURFACE
✔✔THERE IS SOME SMALL-SCALE GENERATION OR DISPERSED MICRO-
GENERATION OCCURRING IN WHAT - ✔✔THE DISTRIBUTION SYSTEM
✔✔WHAT CAN BE COMPARED TO OUR FEDERAL INTERSTATE ROAD SYSTEMS -
✔✔THE TRANSMISSION GRID
✔✔ALL TRANSMISSION LINES THROUGHOUT NORTH AMERICA ARE TIED
TOGETHER - ✔✔TRUE
✔✔LOW VOLTAGE (SECONDARY) - ✔✔600 VOLTS AND BELOW
✔✔DISTRIBUTION VOLTAGE - ✔✔2 KV - 34.5 KV
✔✔SUB TRANSMISSION VOLTAGE - ✔✔46 KV - 161 KV
✔✔TRANSMISSION VOLTAGE - ✔✔230 KV - 765 KV
✔✔ULTRA HIGH VOLTAGE - ✔✔800 KV AND ABOVE
RATED A+
✔✔A SINE WAVE HAS A VALUE OF 0 HOW MANY TIMES - ✔✔3
0/180/360
✔✔FREQUENCY IS MEASURED IN - ✔✔HERTZ
✔✔DEGREE IN SEPARATION BETWEEN EACH PHASE - ✔✔120
✔✔NUMBER OF TIMES A SINE WAVE PATTERN OCCURS IN ONE SECOND IS
KNOWN AS - ✔✔FREQUENCY
✔✔RMS IS FOUND BY MULTIPLYING THE PEAK AMPLITUDE BY - ✔✔O.707
0.707XPEAK
✔✔HOW MANY WIRES IN A DELTA SYSTEM - ✔✔3
NO NUETRAL
DELTA NEEDS HELP
✔✔HOW MANY WIRES IN A WYE SYSTEM - ✔✔4
WITH NUETRAL
WYE STANDS ALONE
✔✔ELECTRICAL CIRCUITS REQUIRE WHAT THREE ELEMENTS TO FUNCTION
PROPERLY - ✔✔1. VOLTAGE SOURCE
2. CONDUCTOR
3.LOAD
✔✔ANYTHING CONNECT DIRECTLY ACROSS TWO POINTS OF DIFFERENT
POTENTIAL IS SAID TO BE WHAT - ✔✔IN SERIES
✔✔FOUR BASIC RULES FOR SERIES CIRCUIT - ✔✔1. AMOUNT OF CURRENT
FLOWING IS THE SAME
I IS THE CONSTANT
2.SUM OF THE INDIVIDUAL SOURCE VOLTAGES
E+E+E=E
3.SUM OF INDIVIDUAL RESISTANCES
R+R+R=R
4.SUM OF POWER
P+P+P=P
✔✔SERIES CIRCUIT - ✔✔SINGLE CURRENT PATH
,✔✔PARALLEL CIRCUIT - ✔✔CONTAIN TWO OR MORE PATHS THROUGH WHICH
CURRENT CAN FLOW
✔✔FOUR BASIC RULES FOR PARALLEL CIRCUIT - ✔✔1.VOLTAGE IS EQUAL OR
CONSTANT
E IS CONSTANT
2.SUM OF CURRENT THROUGH EACH LEGS
I+I+I=I
3.TOTAL RESISTANCE IN A CIRCUIT MUST ALWAYS BE LESS THAN THE
LOWEST VALUE RESISTOR
1/R+1/R+1/R=1/R (USE THE 1/X BUTTON ON THE CALCULATOR)
4.SUM OF POWER IN EACH LEG
P+P+P=P
✔✔MOST COMMON CIRCUIT OF INTERIOR WIRING - ✔✔COMBINATION CIRCUIT
ALSO KNOWN AS SERIES-PARALLEL
✔✔THE POWER SYSTEM CONSISTS OF FOUR BASIC "SUB-STATIONS" -
✔✔GENERATION, TRANSMISSION, SUBSTATIONS, DISTRIBUTION
✔✔WHERE IS GENERATION FACILITIES USUALLY LOCATED - ✔✔LONG
DISTANCES FROM THE CUSTOMERS
✔✔MOST COMMON GOAL OF GENERATION FACILITIES - ✔✔GENERATE
ELECTIRCAL POWER AS EFFICIENTLY AS POSSIBLE
✔✔TO TURN GENERATORS WHICH PRODUCES ELECTRICITY YOU FIRST HAVE
TO CONVERT WHAT TO MECHANICAL POWER - ✔✔COAL, OIL, GAS, STEAM,
WATER, OR ATOMS
✔✔GENERATORS TYPICALLY USE ENERGY FROM - ✔✔STEAM, WATER
PRESSURE, COMBUSTION ENGINE, COMBUSTION TURBINE, WIND,
COGENERATION, BIOMASS, RESOURCE RECOVERY
✔✔3 MOST COMMON METHODS OF GENERATION - ✔✔FOSSIL, HYDRO,
NUCLEAR
✔✔ELECTRICITY IS TYPICALLY GENERATED IN RANGE FROM - ✔✔13,800 TO
24,000 VOLTS
✔✔IN THE US, POWER IS GENERATED AT - ✔✔60 Hz
✔✔OTHER PARTS OF THE WORLD, POWER IS GENRATED AT - ✔✔50 Hz
, ✔✔WHAT IS BURNED IN THE STEAM GENERATOR AND THE HEAT PRODUCES
HIGH-PRESSURE STEAM - ✔✔FUEL
✔✔WHAT HAS HISTORICALLY SUPPLIED MOST OF THE WORLD'S ENERGY -
✔✔FOSSIL FUELS
✔✔IN HYDRO PLANTS, ELECTRIC POWER IS GENERATED BY WHAT - ✔✔WATER
FLOWING THROUGH A TURBINE
✔✔ADVANTAGES OF HYDROELECTRIC GENERATION - ✔✔LOW OPERATING
COST, HIGH PRODUCTION CAPABILITY, A RENEWABLE RESOURCE, DOES NOT
REQUIRE ANY FUEL
✔✔DISADVANTAGES OF HYDROELECTRIC GENERATION - ✔✔USUALLY
LOCATED FAR FROM THE LOAD CENTERS, COST TO CONSTRUCT, LAND LOST
TO BACKWATER, IMPACT ON WILDLIFE
✔✔WHAT PERCENTAGE OF TODAYS ENERGY IS PRODUCED BY NUCLEAR
GENERATION - ✔✔20%
✔✔GEOTHERMAL GENERATION IS PRODUCTED - ✔✔USING THE HEAT OF THE
EARTH TO PRODUCE STEAM NEAR THE SURFACE
✔✔THERE IS SOME SMALL-SCALE GENERATION OR DISPERSED MICRO-
GENERATION OCCURRING IN WHAT - ✔✔THE DISTRIBUTION SYSTEM
✔✔WHAT CAN BE COMPARED TO OUR FEDERAL INTERSTATE ROAD SYSTEMS -
✔✔THE TRANSMISSION GRID
✔✔ALL TRANSMISSION LINES THROUGHOUT NORTH AMERICA ARE TIED
TOGETHER - ✔✔TRUE
✔✔LOW VOLTAGE (SECONDARY) - ✔✔600 VOLTS AND BELOW
✔✔DISTRIBUTION VOLTAGE - ✔✔2 KV - 34.5 KV
✔✔SUB TRANSMISSION VOLTAGE - ✔✔46 KV - 161 KV
✔✔TRANSMISSION VOLTAGE - ✔✔230 KV - 765 KV
✔✔ULTRA HIGH VOLTAGE - ✔✔800 KV AND ABOVE
