Exam (elaborations)
CSLB Contractor B Exam (Electrical Questions and Answers)
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CSLB Contractor B Exam (Electrical Questions and Answers)
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CSLB Contractor B Exam (ElectricalQuestions and Answers)
(746 x HP) / (V x A) - ANSWER-efficiency formula
(V x A x EFF) / 746 - ANSWER-horsepower formula
0 degrees ( perfect step with each other) - ANSWER-what kind of phase shift is this
1,000 - ANSWER-1 inch is equal to how many mils
1. Portable adapter for existing wall outlets
2. Replacements for receptacles
3. Circuit-breaker types
4. A heavy duty, multiple-outlet GFI for use on construction and industrial sites. -
ANSWER-four types of ground fault interrupter
1.2 volts (12Volts x ,000) - ANSWER-Example: The primary and secondary
windings of a step-down transformer are: Primary 1000 turns, Secondary 100 turns
If a voltage of 12V (E p), is applied across the primary, how many Volts (E,), will be
induced across the secondary?
1/1000h - ANSWER-A mil refers to the wire's diameter in ________ of an inch
1/resistance - ANSWER-=conductance
100 - ANSWER-wire #1 THW alum. AMPS
1000n - ANSWER-how do you write 1,000 ohms
115 - ANSWER-#2 copper AMPS
115 - ANSWER-#2 THW AMPS
120 volts (12 Volts x 1,) - ANSWER-Example: The Primary and Secondary
windings of a step-up transformer are: Primary 100 turns, Secondary 1,000 turns
If a voltage of 12V (E ), is applied across the primary, how many Volts (E,), will be
induced across the secondary?
130 - ANSWER-wire #1 THW AMPS
15 - ANSWER-#14 copper AMPS
15 - ANSWER-#14 THWN AMPS
, 180 degrees (micro-images of each other) - ANSWER-what kind of phase shift is this
2 - ANSWER-Conductors are permitted to be used at a continuous 90 0 C operation
temperature
2,400 watts (10 amps x 240v) - ANSWER-Example: The primary of a step-down
transformer has a voltage {E p) of 240V and a current(I p) of 10 amps. If the secondary
voltage (E s ) is 24V, what is the secondary current (I s )?
20 - ANSWER-#12 copper AMPS
20 - ANSWER-#12 THW AMPS
240-Volt Receptacle - ANSWER-
30 - ANSWER-#10 copper AMPS
30 - ANSWER-#10 THW copper AMPS
35 - ANSWER-#10 THW AMPS
360 volts - ANSWER-For 208 volts x 1.732, use
398 volts - ANSWER-For 230 volts x 1.732, use ___ volts
416 volts - ANSWER-For 240 volts x 1.732, use ____ volts
50 - ANSWER-#6 alum. 75 C AMPS
50 - ANSWER-#6 aluminum AMPS
50 - ANSWER-#8 THW copper AMPS
50 - ANSWER-#8 THWN alum. AMPS
50 - ANSWER-#8 THWN AMPS
50 degrees (B "leads" A) - ANSWER-what kind of phase shift is this
60 cycles per second (60 Hz) - ANSWER-Nearly all AC power systems in U.S.A.
operate at a frequency of
65 - ANSWER-#4 aluminum AMPS
65 - ANSWER-#4 THW alum. AMPS
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