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Telephone Engineering – 1 – 4

16. A fax transmission is usually at a _______ mode.

(a) simplex
(b) half-duplex
(c) full duplex
(d) multiplex

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

17. The sampling period for telephone signals.

(a) 8000 Hz.
(b) 125 μsec.
(c) 6400 Hz.
(d) 100 μsec.

Answer
Answer : (b)

Explanation
No answer description available for this question. Let us discuss.

18. What part of the conventional telephone set the transmitter and receiver unit are located ?

(a) dial
(b) base
(c) keypad
(d) handset

Answer
Answer : (d)

Explanation
No answer description available for this question. Let us discuss.

19. The type of receiver widely used in the conventional telephone set.

(a) electromagnetic
(b) ceramic
(c) carbon
(d) piezoelectric

Answer
Answer : (a)

Explanation
No answer description available for this question. Let us discuss.

20. The signal heard on the telephone line which indicates that the called subscriber set is in use.

(a) dial tone
(b) ringing tone
(c) busy tone
(d) congestion tone

Answer
Answer : (c)

Explanation
No answer description available for this question. Let us discuss.

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