RCDD-002 무료 덤프문제 온라인 액세스

Premises optical fiber links should be tested:

• A.Bidirectionally at both corresponding wavelengths
• B.Bidirectionally at one corresponding wavelength
• C.In one direction at both corresponding wavelengths
• D.In one direction at one corresponding wavelength

The signal at the input to a balanced twisted pair cable is 10 mW. The cable is 1000 feet long and has an attenuation of 1 dB per 100 feet. This cable is connected to the input of a receiver. The noise level at the input to the receiver is 1 microwatt. What is the signal-to-noise ratio (SNR) (dB) at the receiver input?

• A.30 dB
• B.40 dB
• C.60 dB
• D.100 dB
• E.10 dB

The MINIMUM dimensions of the telecommunications main grounding busbar is ________ and variable in length.

• A.4 mm (0.16 in) x 80 mm (3.15 in)
• B.6.3 mm (0.25 in) x 100 mm (4 in)
• C.10.5 mm (0.41 in) x 140 mm (5.51 in)
• D.8 mm (0.31 in) x 110 mm (4.33 in)
• E.12.75 mm (0.50 in) x 175 mm (6.89 in)

Which device uses circulators or diplexer filters to separate and combine the different transmit and receive RF paths?

• A.Repeater
• B.Bidirectional amplifier
• C.Transceiver
• D.Unidirectional amplifier

What is the expected lumenance value, in watts, of a 200 watt fluorescent lamp after three years?

• A.160 watts
• B.140 watts
• C.180 watts
• D.200 watts
• E.120 watts