Communications Engineering Coaching Materials: Section 5 Module 16

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This is the Section 5 Module 16 of the compiled Communications Coaching Materials taken from various sources including but not limited to past Board Examination Questions in Electronic System and Technologies (EST), Communications Books, Journals and other Communications References. This particular Coaching Notes in Communications Engineering has random Questions and Answers in random topics. Make sure to familiarize each questions to increase the chance of passing the ECE Board Exam.

Communications Engineering Coaching: Section 5 Module 16

#	QUESTIONS	ANSWERS
1	A doctoral degree is equivalent to how many additional credit units upon the completion of the degree	45
2	The band of frequencies allocated to cable television relay services by the NTC by	12.17 to 13.20 Ghz
3	Low-power proximity readers for RFID tags have effective radiated power not exceeding	500mW
4	Unauthorized servicing is any service rendered to alter the ___ number or code of any mobile phone unit	IMEI
5	As specified by the NTC, each Voip service resellers must post a performance bond in the amount of _____ to guarantee the delivery of VOIP service to the public	Php 1,000,000
6	What section RA 7925 states that Value Added Services (vas) providers are exempted from securing from the Philippine legislature as long as they don’t set up their own network	Section 11
7	Electronics game providers and developers must secure a certificate of registration from NTC, which is valid for a maximum period of	5 years
8	Minimum validity/expiration period of prepaid load php300.00	75days
9	Optical media board has	5 regular members
10	“optical media act of 2003”	RA 9239
11	For FM stations outside Metro Manila, what is the primetime block	6:00 am to 8:00pm
12	For radio station outside Metro Manila, program interrupted for the airing of commercials must not exceed ___ breaks in every program hour	6
13	IEEE designation of iso-enet (isochronous Ethernet)	IEEE 802.9A
14	Fast token ring, also called as high speed token ring uses the standard token ring topology, protocols, and media access control but runs at ___ Mbps	100
15	IEEE 802.3z	Gigabit Ethernet
16	In what year did ITU-T adopted v.42 recommendation for error detection modems	1988
17	All modem standards has maximum symbol rate of 2400 except	v.34
18	Refers to videoconferencing standards	ITU H.26
19	Fourth symbol used in emission	Details of signals
20	Collegiate body that possesses through its member a thorough knowledge of radio communications and problem of their use	IFRB
21	Defined under international telecommunication convention, Nairobi, 1982, first part, chapter 1, article 2, no. 83	CCIR duties
22	Collegiate body possesses through its members a thorough knowledge of radio communications and the problem of their use	International frequency registration board
23	CCITT formed in	1956
24	CCITT study group number 17	Data transmission over the telephone network
25	CCIR study group is responsible for broadcasting service – sound	10
26	CCIR study group responsible for fixed satellite services	Study group 4
27	CCITT structure has a numbers of study groups that provides the networks classification or specialization for developing the recommendations	Study group 17
28	CCITT study group responsible for the definition and operational aspect of telegraph and user services	Study group 1
29	CIRR study group dealing with particular aspect of radio communications	Study group 11
30	Ds-1 signal consist of ____ channels in multiplexed	24
31	Refers to software type that helps group of people to work together	Groupware
32	FDDI assumes a maximum of 1000 stations and a ___ kilometers path that requires a repeater every 2 kilometers	120
33	Another name for IP switches can message based on their network layer address	Layer 3switches
34	___- can understand several different network layer protocols	Multiprotocol router
35	Connects network with different data link protocols and simply surround a packet using one protocol	Encapsulating bridge
36	Type of switches examines the destination of the incoming packet and immediately connecting the port with the incoming message to the correct outgoing port	Cut through switches
37	Developed TCP/IP	Vinton cerf and bob kahn
38	Developed TCP/IP for	US department of Defense
39	Fiber channel class of service also called connection less	Class 2
40	Fiber class channel of services where a virtual circuit is established that is guaranteed to provide the requested data transmission	Class1
41	Another name for ATM	Cell relay
42	Atm class of service means that the data transmission rate in the circuit will vary and that the application is tolerant of delays	VBR-RT
43	Atm class of service means that the data transmission rate in the circuit will vary but that all cells received must be switched immediately upon arrival	VBR-NRT
44	Fiber optic able is much lighter weighing less than __ pounds per 1000 feet	10
45	Cable modems use in tv system and provide data rates	3 and 50 Mbps
46	Impedance of RG 11 cable	75
47	Minimum run length of RG 11	700 meters
48	Impedance of RG-58/U	50
49	Typical loss of RG-59 cable per 100 meter at 5Mhz	2.25
50	Impedance of RG-59	75
51	RS485 can support up to how may devices on one twisted pair	32
52	CCIR group that deals with sound broadcasting service	10
53	CCIR study group that deals with television broadcasting service	11
54	Audio portion of video tape has a bandwidth of	50 to 10 kHz
55	Video information using mpeg 2 data compression can be reduced in a ratio of	55:1
56	Mpeg- 2 data compression can reduced the amount of High definition TV data by	55 :1
57	Frame per second are there in a low level mpeg 2	30
58	Cctv system, monitoring, image of person must not be less than	5%
59	CCTV system, detection,	10%
60	CCTV system, recognition	50%
61	Typical wavelength for cctv lighting units	715 – 850 nm
62	Camera housing index of IP, protection against dirt and dust only	IP50
63	Camera housing protection against dirt, dust and moisture	IP66
64	Refers to the technology provide enormous storage capacity be daisy-chaining hard disk	SCSI technology
65	Technology where hard disk are grouped into arrays to provide enormous storage	RAID technology
66	Equivalent IRE of 0.3 Vsync pulse	42 IRE
67	For video signals, noise figure less than ___ will result to unacceptable amounts of noise	40 db
68	S-VHS	400
69	VHS	240
70	Which office class is the local central office?	5
71	If the code word is only 4 bits for a T1 system with a frame of 193 bits, how many channels can be transmitted?	48
72	The no. of frame alignment bits in DS-1	1
73	Modems use what type of modulation	· Phase modulation · Frequency modulation · Amplitude modulation
74	Pulse dialing rate	10 pulse per second
75	added performance feature of modern modems	56000 bps
76	Coaxial cable for distribution systems has an impedance	75
77	Noise generated by TDM carrier is ____ that generated analog carrier system	Much less than
78	The line speed of bell system T1 carrier system is	1.544 Mbps
79	ABS-CBN effective radiate power	346.2 kw
80	Backporch period for horizontal sync	5.9 micro sec
81	Front porch period for horizontal sync	1.2 micro sec
82	Impedance UMT cable	75
83	Measure using Physical orientation, appearance (keyword lng)	Geometric datum
84	Presidential decree OMB	PD 1986
85	Year turned of SA for better sensitive effectient of GPS system	2000
86	Founded IEEE	1963
87	Communication _____ fast it generates….	Speed
88	Wide area network	x.25
89	Greater antenna	Greater transmit capacity
90	FDDI maximum stations	1000

Complete List of Communications Engineering Coaching Materials

Communications Engineering Coaching Materials

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