Technology MCQs

✅ The correct answer is option B.
Twisting the yoke will tilt the picture. A projection color television uses three picture tubes and yokes for red, green and blue light.

✅ The correct answer is option D.

✅ The correct answer is option B.

✅ The correct answer is option A.

✅ The correct answer is option C.
A given signal’s second harmonic is twice the given signal’s fundamental frequency. Harmonics are generated when there are non-linearities in an amplifier (there are always non-linearities). The worse the non-linearities, the more harmonics. A signal at 27.5 MHz (approximate frequency for US citizen’s band) would have a second harmonic at 55.0 MHz (on US channel 2!). Can you see why there might be problems? A CB operator might do well to place a low-pass filter on his radio.

✅ The correct answer is option A.

✅ The correct answer is option A.

✅ The correct answer is option C.

✅ The correct answer is option B.

✅ The correct answer is option A.
A virus hoax is usually an email that gets mailed in chain letter fashion describing some devastating highly unlikely type of virus, you can usually spot a hoax because there’s no file attachment, no reference to a third party who can validate the claim and the general ‘tone’ of the message.