# Practice Quiz in Wire and Wireless Communications System Part 55

(Last Updated On: December 21, 2017)

This is the Online Practice Quiz in Wire and Wireless Communications System Part 55 as one of the Communications Engineering topic. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies, Communications Books, Journals and other Communications References.

### Continue Part LV of the Online Practice Quiz

#### Quiz in Wire and Wireless Communications System

Question 541. The first number of the loaded cable designation 19H44 indicates

A. Spacing

B. Coil inductance

C. Wire gauge

D. Attenuation

Question 542. 10 or more subscribers connected in a central office exchange using same local loop

A. wire tapping

B. party lines

C. eaves dropping lines

D. monitor lines

Question 543. A group of sixty voice channels with bandwidth of 240 kHz is called a

A. group

B. supergroup

C. mastergroup

D. jumbogroup

Question 544. The signal to noise ratio for voice based on customer satisfaction is

A. 30 db

B. 35 db

C. 15 db

D. 20 db

Question 545. The attenuation loss limit of the subscriber loop is set at 6 dB. What is the maximum length if a 26H88 loading coil with an attenuation of 0.80 dB per kilometer is added?

A. 1.5 km

B. 3.5 km

C. 5.5 km

D. 7.5 km

Question 546. In fax, the following are scanner signals where the switcher switch in except:

A. 300 Hz

B. phasing signal

C. 90 Hz

D. map signals

Question 547. A trunk is

A. The base of a communication tower

B. A telephone line connecting two C.O.’s

C. A line connecting one telephone set to the PABX

D. The structure where antenna are attached

Question 548. The following are signalling functions except:

A. Ringing signals

C. Supervisory signals

D. None of these

Question 549. During a busy hour in a telephone system an average of one call is lost, then the grade of service is considered to be:

A. 1.01

B. 10%

C. 0.10%

D. 0.01

Question 550. An induction coil which is multiple winding transformer intended to interface a 2-wire circuit to be a 4-wire circuit to permit two-way transmission of signals.

A. Hybrid function

B. Speech transformer

C. Transmission regulation circuit

D. A or B

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