# Practice Quiz in Wire and Wireless Communications System Part 8

Online Practice Quiz in Wire and Wireless Communications System part 8 as one of the Communications Engineering topic.

This is the Online Practice Quiz in Wire and Wireless Communications System Part 8 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 VIII of the Online Practice Quiz

#### Quiz in Wire and Wireless Communications System

Question 71. _____ is picking up of the same station at two nearby points on the receiver dial.

A. Double spotting

B. Hot shot

C. Image frequency

D. Bail shot

Question 72. A method of expressing the amplitudes of complex non-periodic signals such as speech.

A. Volume

B. Pitch

C. Frequency

D. Wavelength

Question 73. Cellular mobile system was first operated in

A. 1979

B. 1981

C. 1983

D. 1985

Question 74. When a line and a load are match the reflection coefficient is

A. Unity

B. Zero

C. Positive infinity

D. Negative infinity

Question 75. ______ is a voice operated device that inserts a high loss in the opposite direction of transmission of the talking party.

A. Hybrid

B. 2-wire circuit

C. Echo suppressor

D. VNL

Question 76. ______ of a data reduction says that when reducing a set of data into the form of an underlying mode, one should be maximally non-committal with respect to missing data.

A. Jaynes maximum entropy principle

B. Kullback principle of minimum discrimination

C. Minimum discrimination

D. Maximum entropy

Question 77. When one channel picks up the signal carried by another channel.

A. Echo

B. Crosstalk

C. Party line

Question 78. If the reflection coefficient is 0.5, the standing wave ratio is

A. 0.33

B. Unity

C. 3

D. Zero

Question 79. Presently, this is the “standard” frequency bandwidth for voice transmission.

A. 0 to 4000 Hz

B. 100 to 3400 Hz

C. 300 to 3400 Hz

D. 300 to 3000 Hz

Question 80. The telephone set is powered by the central office on the ring side at

A. 42 to 52 Vdc

B. –42 to -52 Vdc

C. 24 to 64 Vdc

D. –24 to –64 Vdc

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