Question 93Electricity & Electronics - 1st Asst/Chief

70% to pass

Which of the following data communication cable types offers the greatest immunity to electromagnetic "noise"?

AFiber-optic
BUnshielded twisted pair
CCoaxial (coax)
DShielded twisted pair
AI Explanation

The correct answer is A) Fiber-optic. Fiber-optic cables offer the greatest immunity to electromagnetic "noise" because they transmit data using light rather than electrical signals. Light signals are not affected by electromagnetic interference (EMI) or radio frequency interference (RFI), which can corrupt electrical signals in other cable types like unshielded twisted pair (B) or coaxial (C) cables. Shielded twisted pair (D) cables have better noise immunity than unshielded twisted pair, but still cannot match the complete immunity of fiber-optic cables.

Related Questions
Q279:Which of the listed sections of an emergency switchboard is used to supply power... Q32:As shown in figures "E" and "F" of the pictured high voltage rack mounted circui... Q68:Why is it necessary to perform periodic testing of correctly rated and properly ... Q234:What is the function of a shading coil as used in an AC magnetic controller? ... Q143:In the illustrated throttle control system, the amplifier 'M" functions to inver...

Ready to test your knowledge?

Take a Electricity & Electronics - 1st Asst/Chief Practice Exam
Official Resources
46 CFR Electrical Engineering 46 CFR Machinery & Electrical USCG National Maritime Center
← Previous All Questions Next →

Pass Your Coast Guard Licensing Exams!

Study offline, track your progress, and simulate real exams with the Coast Guard Exams app

Download on App Store Get it on Google Play Download for Mac