Exam (elaborations)
HVAC LVL 2 ALTERNATING CURRENT 03206 (15 QUESTIONS) AND ANSWERS WITH SOLUTIONS 2024
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HVAC LVL 2 ALTERNATING CURRENT 03206 (15 QUESTIONS) AND ANSWERS WITH SOLUTIONS 2024
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HVAC LVL 2 ALTERNATING CURRENT03206 (15 QUESTIONS) AND ANSWERS
WITH SOLUTIONS 2024
The effective (rms) voltage of a sine wave with a peak voltage of 200V is...
A. 100
B. 120.5
C. 141.4
D. 200 - ANSWER C. 141.4
The voltage at the 90° point of a sine wave with a maximum voltage of 10V is...
A. -10V
B. 0V
C. 5V
D. +10V - ANSWER D. +10V
The voltage at the 270° point of a sine wave with a maximum voltage of 10V is...
A. -10V
B. 0V
,C. 5V
D. +10V - ANSWER A. -10V
In an inductive circuit...
A. Current leads voltage
B. Voltage leads current
C. Voltage and current are in phase
D. Voltage lags current by 90° - ANSWER D. Voltage lags current by 90°
A transformer has 200 windings on its primary which received 120VAC. The secondary has 400 windings,
voltage across the secondary is...
A. 60V
B. 120V
C. 240V
D. 400V - ANSWER C. 240V
Phasing of two transformers in parallel can be accomplished using a(n)...
A. Megger
, B. Multimeter
C. Capacitor tester
D. Ohmmeter - ANSWER B. Multimeter
What happens to the stator winding of a single-phase motor when voltage is applied?
A. It immediately rotates
B. It remains stationary
C. It moves up and down like a piston
D. It begins to rotate after a brief delay - ANSWER B. It remains stationary
The synchronous speed of a motor is...
A. The maximum speed at which it will run
B. 95% of its maximum running speed
C. The average speed under load
D. The average speed without a load - ANSWER A. The maximum speed at which it will run
A run capacitor in a single-phase motor can remain in the circuit after the motor starts because
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