The sidebands of a frequency carrier are best described as which of the following?
A. the sum of the carrier signal and the highest value of the mixer output
B. the difference between the highest and lowest input frequency
C. the average of the high and low values of the input signal
D. the sum and difference of the highest input signal and carrier frequency
Answer: D
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In a wastewater system, the water entering the condenser is 85°F and the water leaving the condenser is 90°F. Which of the following statements is a logical explanation for the above conditions?
A. reduced water flow through the condenser B. water regulating valve stuck in the wide-open position C. excess water flow through the condenser D. both b and c
The steam temperature on Boiler-402 is set t:
a. 305ºF b. 215ºF c. 480ºF d. 350ºF
You are driving a new truck with a manual transmission. What gear will you probably have to use to take a long, steep downhill grade?
a. None; newer trucks can coast down hills. b. A higher gear than you would use to climb the hill. c. The same gear you would use to climb the hill. d. A lower gear than you would use to climb the hill.
The subsequent problems deal with a measurement system with a frequency response as shown below:
If the system is used to measure a sinusoidal input of frequency 0.5 rad/sec and of amplitude 2 V, the output will have an amplitude of
A. 2.5 V B. 0.5 V C. 1 V D. 0 V E. 2 V