HVAC LVL 2 ALTERNATING CURRENT 03206 (15 QUESTIONS) AND ANSWERS WITH SOLUTIONS 2024

HVAC LVL 2 ALTERNATING CURRENT
03206 (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