WorksheetsQB05CDE3VFR4
Total questions: 51
Worksheet time: 10hrs 6mins
TWO RESISTORS OF 5 AND 10 OHMS RESPECTIVELY ARE CONNECTED IN PARALLEL. IF THE TOTAL CURRENT TO THE BRANCH IS 24 A, FIND THE CURRENT IN THE 5-OHM RESISTANCE?
16 A
15 A
10A
8A
OVERLOAD PROTECTIVE DEVICES ARE RATED IN _.
AMPERES
COULOMBS
WATTS
VOLTS
A NO LOAD TEST IS PERFORMED ON A TRANSFORMER FOR DETERMINING____.
COPPER LOSS
MAGNETIZING CURRENT AND LOSS
EFFICIENCY OF THE TRANSFORMER
SHORTS
AN INVERSE TIME CHARACTERISTIC OF A FUSE MEANS___.
HIGHER FAULT CURRENT, LONGER TIME NEEDED TO CUT-OFF
LOWER FAULT CURRENT, SHORTER TIME NEEDED TO CUT-OFF
HIGHER FAULT CURRENT, SHORTER TIME NEEDED TO CUT-OFF
NONE OF THESE
IF THE INDIVIDUAL RESISTANCES ARE 5, 10 AND 15 OHMS RESPECTIVELY. WHAT POTENTIAL MUST THE BATTERY SUPPLY TO FORCE A CURRENT OF 0.50 A THROUGH THE CIRCUIT?
15 V
30 V
10 V
60 V
WHAT LEVEL OF ELECTRICAL LICENSE IS NEEDED AS ONE OF THE REQUIREMENTS TO BE APPOINTED AS MEMBERS OF THE BOARD OF ELECTRICAL ENGINEERING?
RME
REE
PEE
ALL OF THESE
WHAT IS THE FUNCTION OF THE ZERO ADJUST CONTROL IN MULTIMETER?
THE MOVING PARTS CAN BE TIGHTENED
IT SERVES TO CONDUCT THE CURRENT
WITH THIS CONTROL, THE SENSITIVITY OF THE INSTRUMENT CAN BE CHANGED
THE ZERO POINT IS CORRECTED WITH THE HELP OF THIS CONTROL
WHICH OF THE FOLLOWING DEVICES IS NOT FOUND ON A DC BOARD?
SYNCHROSCOPE
AMMETER
VOLTMETER
RHEOSTAT
THE COMPRESSED MIXTURE OF AIR AND PETROL IS BURNT BY MEANS OF
SPARK OF SPARK PLUG
DISTRIBUTOR
COMPRESSION
NONE OF THESE
A STEP-DOWN TRANSFORMER,
LOWERS BOTH THE VOLTAGE AND CURRENT
LOWERS THE VOLTAGE AND INCREASES THE CURRENT
LOWERS THE CURRENT AND INCREASES THE VOLTAGE
INCREASES BOTH THE VOLTAGE AND CURRENT
THE INDUCING EMF WITHIN THE CIRCUIT ITSELF CAUSED BY ANY CHANGE OF CURRENT WITHIN THAT CIRCUIT
MUTUAL INDUCTANCE
FRICTION
SELF INDUCTANCE
LOSSES
THE RESISTANCE OF A MATERIAL IS INVERSELY PROPORTIONAL TO ITS
LENGTH
DIAMETER
CROSS-SECTIONAL AREA
VOLUME
WHICH OF THE FOLLOWING DC GENERATORS ARE PREFERABLE FOR PARALLEL OPERATIONS DUE TO THEIR DROOPING VOLTAGE CHARACTERISTICS?
SERIES GENERATORS
SHUNT GENERATORS
COMPOUND GENERATORS
ALL OF THESE
FLUX IN A MAGNETIC CIRCUIT IS COMPARABLE TO WHAT IN ELECTRIC CIRCUIT?
VOLTAGE
RESISTANCE
CURRENT
POWER
IN A SERIES RL CIRCUIT, THE CURRENT ___ THE VOLTAGE
LEADS
LAGS
BOTH A AND B
NEITHER A OR B
AN OPEN RESISTOR READS ____ OHMS IN AN OHMMETER.
INFINITE
ZERO
1 MEGOHM
NONE OF THESE
WHICH TYPE OF DC ARMATURE WINDING IS USED FOR HIGH CURRENT APPLICATIONS?
WYE
WAVE
DELTA
LAP
THE TOTAL OPPOSITION TO CURRENT FLOW IN AC CIRCUITS.
RESONANCE
IMPEDANCE
ADMITTANCE
RELACTANCE
THE RECIPROCAL OF IMPEDANCE
CONDUCTANCE
RELUCTANCE
ADMITTANCE
SUSCEPTANCE
WHICH OF THE FOLLOWING STATEMENTS IS TRUE?
THE SMALLER THE DIAMETER OF A CONDUCTOR, THE HIGHER THE RESISTANCE
THE LARGER THE DIAMETER OF A CONDUCTOR, THE HIGHER THE RESISTANCE
THE SMALLER THE DIAMETER OF A CONDUCTOR, THE LESSER THE RESISTANCE
THE DIAMETER OF A CONDUCTOR DOES NOT AFFECT THE RESISTANCE
THE POWER FACTOR OF AN INCANDESCENT BULB IS
0.707 LAGGING
0.707 LEADING
1.0
ZERO
THE IRON LOSSES OF A DC MOTOR OCCUR IN THE____.
FIELD
ARMATURE
YOKE
COMMUTATOR
COMMUTATOR SEGMENTS ARE NORMALLY MADE FROM ______.
IRON
HARD DRAWN COPPER
BRASS
ALUMINUM
WHEN 30 V IS APPLIED ACROSS TWO EQUAL RESISTANCE IN SERIES, 10 mA OF CURRENT FLOWS. FIND THE VALUE OF EACH RESISTANCE.
1.5 kΩ
3.0 kΩ
150 kΩ
300 kΩ
MEGGER IN ITS OPERATION IS BASED UPON
ELECTROSTATIC METER
MOVING COIL METER
DYNAMIC METER
MOVING IRON METER
A TOOL USED FOR PULLING GEARS, BEARINGS, AND BUSHINGS ON THE SHAFT OF A MOTOR OR A GENERATOR.
C-CLAMP
HICKEY
PULLER
MONKEY WRENCH
A HYDROMETER IS USED TO MEASURE WHICH OF THE FOLLOWING?
SPECIFIC GRAVITY OF THE BATTERY ELECTROLYTE
WATER CONTENT OF THE BATTERY
INTERNAL TEMPERATURE OF A BATTERY
ACID CONTENT OF A BATTERY
APPLICANTS FOR REGISTERED MASTER ELECTRICIANS' EXAMINATION MUST BE AT LEAST ___ YEARS OF AGE.
18
19
17
21
IF THE GENERATOR FIELD IS EXCITED FROM A BATTERY, THE MACHINE IS CLASSIFIED AS WHAT TYPE OF GENERATOR?
SEPARATELY EXCITED
SELF EXCITED
SYNCHRONOUS
NONE OF THESE
IN A GIVEN CIRCUIT, WHEN THE POWER FACTOR IS UNITY, THE REACTIVE VOLT-AMPERE IS ___.
MAXIMUM
ZERO
EQUAL TO REAL POWER
EQUAL TO APPARENT POWER
ONE ADVANTAGE OF THE MOVING COIL INSTRUMENT IS THAT ITS SCALE IS
NON-LINEAR
LINEAR
LOGARITHMIC
EXPONENTIAL
WHICH OF THE FOLLOWING IS AN ADVANTAGE OF A CB OVER A FUSE?
IT IS MORE RELIABLE
IT IS CHEAPER
IT IS EASY TO DETECT OPEN, CLOSE OR TRIP POSITIONS
IT HAS A HIGHER CURRENT RATING
THE SPEED OF A DC MOTOR IS DIRECTLY PROPORTIONAL TO ITS
ARMATURE CURRENT
FLUX PER POLE
BACK EMF
TORQUE
THE PREFIX PICO MEANS
10-12 OF A UNIT
10-6 OF A UNIT
10-15 OF A UNIT
10-9 OF A UNIT
WHICH ONE IS THE SAME AS RMS VALUE OF AN ALTERNATING WAVE?
AVERAGE VALUE
INSTANTANEOUS VALUE
EFFECTIVE VALUE
ABSOLUTE VALUE
CURRENT THAT CONTINUALLY REVERSES ITS DIRECTION
PULSATING DIRECT CURRENT
ALTERNATING CURRENT
DIRECT CURRENT
PULSATING ALTERNATING CURRENT
DEVICE USED TO PULL WIRE THROUGH THE CONDUIT
STRAPS
FISH TAP
WIRE TONGS
PULLER
IT WAS EXPERIMENTALLY FOUND BY JAMES PRESCOTT JOULE THAT THE HEAT PRODUCED IN A CURRENT CARRYING CONDUCTOR IS PROPORTIONAL TO
THE SQUARE OF THE CURRENT
THE CURRENT
SQUARE OF RESISTANCE
NONE OF THESE
A THREE-LAYER SEMI-CONDUCTOR DEVICE.
POTENTIOMETER
DIODE
TRANSISTOR
VACUUM TUBE
AN APPLICANT FOR REGISTERED MASTER ELECTRICIANS' EXAMINATION MUST AT LEAST COMPLETED A ___ YEARS ELECTRICIAN COURSE AND HAS A SPECIFIC RECORD OF ____ YEARS OF APPRENTICESHIP AFTER COMPLETION OF THE COURSE
2, 3
1, 1
2, 2
1, 2
WHICH OF THE FOLLOWING CANNOT BE USED AS A MEDIUM FOR EXTINGUISHING THE ARC OF A CB?
VACCUM
SF6 GAS
WATER
OPEN AIR
MAGNETISM THAT REMAINS IN A MAGNET EVEN AFTER THE MAGNETIZING FORCE HAS BEEN WITHDRAWN?
NATURAL
SATURATION
IDEAL
RESIDUAL
METER ACCURACY IS DETERMINED BY_______.
FULL SCALE DEFLECTION
ONE FOURTH OF FULL SCALE DEFLECTION
ZERO DEFLECTION
HALF SCALE DEFLECTION
IN DC CIRCUIT, INDUCTANCE AND CAPACITANCE ARE IRRELEVANT IN CIRCUIT ANALYSIS DUE TO _____.
DC SUPPLY HAS NO FREQUENCY
THEY DO NOT EXIST IN DC CIRCUITS
THEIR EFFECT IS USELESS IN DC CIRCUITS
ALL OF THESE
EQUALIZER CONNECTIONS ARE NECESSARY IN PARALLELING TWO OR MORE WHAT TYPE OF GENERATORS?
SHUNT GENERATORS
SERIES GENERATORS
COMPOUND GENERATORS
ALL OF THESE
IN MOTOR CONTROLS, A MAINTAINING CONTACT IS WHAT TYPE OF CONTACT?
NORMALLY OPEN
NORMALLY CLOSE
DELAY-ON
DELAY-OFF
WHICH OF THE FOLLOWING INSTRUMENTS IS THE MOST SENSITIVE?
MOVING IRON TYPE
INDUCTION TYPE
ELECTROSTATIC TYPE
PERMANENT MAGNET TYPE
WHAT TYPE OF RELAY IS USED FOR PROTECTION OF MOTORS AGAINST OVERLOAD?
THERMAL RELAY
MAGNETIC CONTACTOR
BUCHHOLZ'S RELAY
DIFFERENTIAL RELAY
AN OVEN TAKES 11 A AT 220 V. IT IS DESIRED TO REDUCE THE CURRENT TO 10 A. WHAT RESISTANCE MUST BE CONNECTED IN SERIES?
2 OHMS
22 OHMS
20 OHMS
5 OHMS
WHAT COMPONENT OF A DC GENERATOR IS NOT FOUND ON A SEPARATELY EXCITED AC GENERATOR?
YOKE
FIELD POLES
COMMUTATOR
ARMATURE
FOR SINGLE PHASE AC OR DC MOTORS SUPPLIED BY A TWO WIRE, SINGLE PHASE AC OR DC WITH ONE CONDUCTOR GROUNDED, HOW MANY OVERLOAD UNITS SHALL BE REQUIRED?
ONE, IN THE GROUNDED CONDUCTOR
ONE, IN THE UNGROUNDED CONDUCTOR
TWO, IN BOTH CONDUCTORS
NO OVERLOAD UNITS REQUIRED
