What is the frequency of an AC waveform that completes 20 cycles per half second?
a. 10Hz
b. 20Hz
c. 30Hz
d. 40Hz
d. 40Hz
You might also like to view...
Which of the following describes the standard in NFPA 70E®?
a. A worker with a disability has equal rights to employment. b. Employers with greater than 10 employees must keep records of work-related injuries and illnesses. c. Safe work practices must be applied when working on or near exposed energized parts. d. All tools, equipment, and machines must be inspected by the employer before use.
The pH of coolant is tested using a ________.
A) Hydrometer B) Refractometer C) Voltmeter D) Test strip
President Nixon's 1970 invasion of Cambodia led to
A. a successful suppression of Viet Cong gains in South Vietnam. B. congressional approval for an expanded war effort. C. a growing threat from the Soviet Union to enter the war on the side of North Vietnam. D. dramatic new waves of bitter domestic protest against the war. E. an end to the secret American bombing campaign against Cambodia.
To help prevent cannibalism, producers _____
A) lower temperature? B) leave on lights? C) use a brooder? D) feed more often