Question 93Electricity & Electronics - 1st Asst/Chief
70% to passWhich 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
Q245:You direct the electrician to take quarterly insulation resistance reading of th...
Q24:Which of the electronic schematic symbols represents the capacitor illustrated i...
Q226:Which of the listed conditions might contribute to very rapid wearing of a DC m...
Q179:During its operation, loud buzzing and resultant welding of contacts of a magnet...
Q28:What would be the terminal voltage and ampere-hour capacity of the battery bank ...
Ready to test your knowledge?
Take a Electricity & Electronics - 1st Asst/Chief Practice ExamOfficial Resources
Pass Your Coast Guard Licensing Exams!
Study offline, track your progress, and simulate real exams with the Coast Guard Exams app