NCTI Lesson 7 Test Questions And Answers
A customer reports a problem of no dial tone(NDT) Upon
Inspection, the tech notices that new carpeting has been installed.
What should the tech do next -
correct answer ✅Look for a cable that runs under the carpet; it is
likely that the cable has a short from the carpeting tack strip
What is the likely problem when there is dial tone on one phone
connected to an outlet, but not on two other phones connected to
two different outlets -
correct answer ✅An open circuit caused by a break in a conductor,
poor contact in a modular connector, or an incorrect wire
connection
In the customer premises, what could cause some dual tone
multifrequency (DTMF) touch-tone telephones to have continuous
dial tone caused by polarity reversal, but not other DTMF
telephones -
correct answer ✅The telephone wiring polarity is incorrect, and
the customer has a mix of older and newer DTMF touch-tone
telephones
What should be checked as a possible cause of hum on a
customer's telephone line -
correct answer ✅Shielding problems in the station wiring, poor
terminations, or poor grounding and bonding connections
A customer reports a problem of no dial tone(NDT) Upon
Inspection, the tech notices that new carpeting has been installed.
What should the tech do next -
correct answer ✅Look for a cable that runs under the carpet; it is
likely that the cable has a short from the carpeting tack strip
What is the likely problem when there is dial tone on one phone
connected to an outlet, but not on two other phones connected to
two different outlets -
correct answer ✅An open circuit caused by a break in a conductor,
poor contact in a modular connector, or an incorrect wire
connection
In the customer premises, what could cause some dual tone
multifrequency (DTMF) touch-tone telephones to have continuous
dial tone caused by polarity reversal, but not other DTMF
telephones -
correct answer ✅The telephone wiring polarity is incorrect, and
the customer has a mix of older and newer DTMF touch-tone
telephones
What should be checked as a possible cause of hum on a
customer's telephone line -
correct answer ✅Shielding problems in the station wiring, poor
terminations, or poor grounding and bonding connections
