License Exam Quiz #372

de Steve, AE8AT 

The quiz is still shaking off Hamvention and we have another week of questions selected at random from the least used sections of each question pool.

T5C10 How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes?

A. 4.8 watts

B. 30 watts

C. 14.5 watts

D. 0.208 watts

G9C10 Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

A. The physical length of the boom

B. The number of elements on the boom

C. The spacing of each element along the boom

D. All these choices are correct

E4C05 What does a receiver noise floor of -174 dBm represent?

A. The receiver noise is 6 dB above the theoretical minimum

B. The theoretical noise in a 1 Hz bandwidth at the input of a perfect receiver at room temperature

C. The noise figure of a 1 Hz bandwidth receiver

D. The receiver noise is 3 dB above theoretical minimum

Answers:

T5C10 = B

G9C10 = D

E4C05 = B