Multiple choice question paper

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1 City ~Guils Multiple hoie question pper Pper numer /004 ~~~ Exmintion Rio Amteurs Mony 11 My1998 Series My 1998 Pper Written Y4 hours You shoul hve the following for this exmintion this question ook use the tthe Sheule to nswer two nswer sheets ny pproprite questions nhbpenll MC THIS QUESTION BOOK IS TilE PROPERTY OF THE CITY AND GUILDS OF WNDON INSTITUTE AND IS TO BE RETURNED AFTER THE EXAMINATION Re the following notes BEFORE you nswer ny questions. You MUST use n HB PENCIL to omplete ALL prts of the nswer sheet. Eh question shows FOUR possile nswers (lettere'', '', '', n ''), only ONE is orret. Deie whih one is orret n mrk your nswer on the ANSWER SHEET with your HB penil. For exmple if you eie '' is orret, mrk your nswer like this If you wnt to hnge your nswer, nel your first hoie y filling in the lower hlf of the ox like this Then mrk the nswer whih you hve now eie is orret. Any lultions or rough work n e one in this question ook Attempt ll questions; if you ftn question iffiult, leve it n return to it lter. This pper ontins 80 questions; nswer them using the 'oxes' numere 1 to 25 n 26 to 80 on seprte nswer sheets. See next pge

2 Prt A Liensing Conitions n Operting Proeures Answer questions 1 to 25 on seprte nswer sheet 2

3 PART A UCENSING CONDffiONS AND OPERATING PROCEDURES I Wht re the neessry qulifitions for 5 In n mteur ll sign the Regionl otining n Amteur Rio Liene (A}? Seonry Lotor U refers to A pss in the Rio Amteurs Guernsey Exmintion t ny time. Isle of Mn A pss in the Rio Amteurs Wles Exmintion within the lst yer. Sotln. A pss in the Rio Amteurs Exmintion n pss in the Amteur 6 The lss of emission FlD refers to Morse Test within the lst yer. telephony using frequeny moultion A pss in the Rio Amteurs (f.m.) Exmintion n pss in the Amteur telephony using phse moultion Morse Test t ny time. (p.m.) 2 pket/t using iret frequeny shift The Amteur Rio Liene (A) sttes tht the keying of the rrier Sttion shll e use for the purpose of pket/t using frequeny shift keye self-trining in ommunition y uio tone. wireless telegrphy, whih use inlues tehnil investigtions 7 The Amteur Rio Liene (A) uthorises sening or reeiving news or messges the Liensee to reeive of, or on ehlf of, ny soil rosting sttions of the lsses of orgnistion emission for whih the sttion is sening messges in whih the Liensee liense to trnsmit hs no more thn n iniret peuniry messges on polie frequenies uring interest genuine emergeny ommunition only with other liense ommeril sttions using shre users on the frequeny ns speifie mteur ns in the first olumn of the Sheule. trnsmissions in the Stnr Frequeny 3 If n Amteur Rio Liene (A) or (B) is hel Servie. on ehlf of lu, greetings messges my 8 The Amteur Rio Liene sttes tht to e sent y non-liense persons provie voi using interferene the Liensee tht shoul onut tests these messges re sent n reeive to every 28 ys n from sttions in ountries whih every 30 ntinutes hve implemente CEPT from time to time Reommention T/R when instrute y uthorise eh person sens only one suh representtives of the Seretry of Stte. messge to eh sttion with whih the sttion is in ontt 9 If n mteur sttion is situte within 1 km eh greetings messge oes not exee of the ounry of n erorome, the height four minutes ove groun level of the ntenn n it is uner the iret supervision of ny supporting mst must not exee holer of n Amteur Rio Liene (A) or (B). 15m 20m 4 In the 'Amteur Rio Liene (A) or (B) 25m Terms, Provisions n Limittions Booklet 30m. BR68', wireless telegrphy mens 10 The Amteur Rio Liene (A) sttes tht the ny permitte type of trnsmission pprtus omprise in the sttion shoul e Morse n t only esigne, n onstrute, n mintine Morse, RTIY, t, fsimile, SS1V only n use so tht its use oes not use ny ll types of trnsmission exept telephony. out of n emissions hrmonis spurious emissions unue interferene. 3 See next pge

4 11 The Amteur Rio liene (A) sttes tht 17 Amteur Rio liene holers my operte when operting uner the liene in in the n MHz t power levels ountries whih hve implemente CEPT not exeeing Reommention T/R the liensee 26BW shll 22BW e temporry visitor n non-resient 20BW in the host ountry lsbw e permnent resient in the host ountry 18 Whih one of the following seonry hve een resient in the host ountry llotions my only e use with the written for t lest 2 months onsent of the Seretry of Stte? e visitor to the host ountry for not MHz. more thn 2 months MHz MHZ. 12 When the sttion is operte t Temporry MHz. Lotion the Liensee my us whih one of the following suffixes? 19 Mximum power shoul e use only when /A. trnsmitting Morse /T. mking CQ ll /MM. tking prt in ontest w ommunition is iffiult. 13 Whih one of the following nee NOT e reore in the Log (exept when the Sttion 20 The log of n mteur rio sttion is in n Unttene Opertion)? must e kept seurely wy from ny unuthorise person Dtes of trnsmission. must only ontin those etils Speifi frequenies. speifilly lle for in the liene Initil lls. n e vlule i to the opertion of Power. the sttion y logging ll ommunitions n oservtions in full 14 An mteur sttion my NOT e estlishe must e retine t the sttion for t in lest one yer. vessel on n inln wterwy motorise rvn 21 The MAIN use of v.h.f. n u.h.f. repeters is puli trnsport vehile to privte light eroplne. inrese the ommunitions rnge of fixe sttions 15 In the se of prolonge ontt, n provie emergeny ommunitions for mteur in the Unite Kingom shoul user servies trnsmit the ll sign t intervls not inrese the ommunitions rnge of exeeing moile sttions 10 minutes provie fol point for mteur 15 minutes ommunitions. 20 minutes 30 minutes. 22 Wht is the Q-oe for 'I hve nothing for you'? 16 An sorption wvemeter for heking QSB. spurious emissions must QRU. hve il lirte to n ury of QSL. ±1% QSK. hve frequeny overge extening up to t lest the seon hrmoni 23 Ignoring n plns my result in lwys e heke ginst rystl wmeessry interferene etween lirtor sttions using ifferent moes hve uilt-in mplifier to etet ny letter from the Seretry of Stte very wek emissions. onfistion of equipment letter from the Seretry of the IARU. 4

5 24 The llsign G2UFO in phonetis is Germny 2 unle fox ooe Germny 2 unle foxtrot osr golf 2 uniform fox ooe golf 2 uniform foxtrot osr. 25 During thunerstorm it is visle to isonnet the ntenns n unplug the rio n omputing equipment inform other mteurs vi the lol repeter of the storm.!.with from the mins supply to stny ttery supply hnge to higher frequeny n to voi the interferene use y the lightning. 5 See next pge

6 PrtB Priniples n Prtie Answer questions 26 to 80 on seprte nswer sheet 6

7 12Y <>-- R PARTB PRINCIPLES AND PRACTICE +V ovo FIG load 26 Refer to Fig. 26ol. The mximum permitte urrent through the Zener ioe is 50 ma, n through the lo is IOmA. 6 V r roppe ross R. Wht is suitle vlue of R? !2. 120!2. 1.2k.Q. 27 A prllel resonnt iruit is MOST seletive if the oil hs high resistne low resistne resistne of~. fl reststne o C. R2 100pF Rl FIG In Fig the purpose of the resistor Rl is to inrese the spee of the rely swithing ON time reue the urrent eing rwn y the rely oil ensure the emitter voltge stys elow the se voltge ensure the rely stys OFF with no input signl D i<l(]:'l---r-ie:j==j-~o+12v 240V 112V toot loa FIG In Fig. 0454, if the urrent through the resistor Rl is loa, the urrent in the primry is 50mA 500mA la 5A. A Dl D3 FIG D4 29 Refer to Fig When point B is t pek positive voltge with respet to point A, the urrent is flowing through D4nDI D3 nd2 D2nDI DI n D3. Rl 7 B 1 L TO TRANSCEIVER FIG The purpose of the ioe Dl in Fig is to smooth the supply to the rely introue time ely into the opertion of the rely prevent reverse polrity eing pplie ishrge the rely oil when swithe ott. 32 The purpose of pre-seletor in superheteroyne reeiver is to mth the ntenn to the input of the mixer reue rition of the signl from the v.f.o. reue the mplitue of out of n signls rehing the mixer selet the frequeny rnge of the v.f.o. 33 A superheteroyne reeiver tune to.w. signl t 3530kHz with the lol osilltor tune to 3980kHz n the.f.o. tune to khz proues n uio et note of 449.2Hz 530.0Hz 800.0Hz 980.0Hz. See next pge

8 34 In n f.m. reeiver, the uio signl is reovere from the r.f. envelope y isrimintor n integrtor ifferentitor low pss filter. +lodv 2A SSB trnsmitter Power meter \ I; 35 An inoming signl suenly inreses in signl strength. The utomti gin ontrol (.g..) of reeiver will reue the mplifition of the reeiver inrese the mplifition of the reeiver proue positive feek in the uio output stge inrese the i.f. nwith. 36 Whih stge of reeiver ffets its frequeny stility? Prout etetor. R.E mplifier. Lol osilltor. Rtio etetor. r , I A I INPUT~.;.A;::-.1--,-'~ I L:s:::J--.1 I L I..J FIG.l Fig shows the power mplifier stge of n h.f. trnsmitter, for use on 3.5, 7 n 14MHz. The p.. output iruit onsists of ron trnsformers, followe y three swithe units A, B n C. The purpose of A,BnCisto mth the ntenn to the feeer mth the feeer to the trnseiver tune the p.. ttenute hnnonis n spurious emissions. I ve FIG Refer to Fig An s.s.. (J3E) trnsmitter hs power meter onnete in the ntenn feeer. Wht will the meter inite when the trnsmitter is keye with no moultion pplie? 200 W p.e.p. 100W p.e.p. Full sle efletion. No efletion. 39 The purpose of the IF Shift ontrol on n h.f. trnseiver is to vry the frequeny response of the mirophone mplifier vry the frequeny response of the reeiver uio mplifier minimise interferene from sttion on n jent frequeny just the gin of the i.f. mplifier stges. 40 A.w. trnsmitter operting on 7 MHz uses interferene on the 14 MHz n. The prole use is wrongly juste frequeny multiplier use of unlne feeer to ipole ntenn high s.w.r. poor frequeny stility of the osilltor. 41 Amplitue moultion of.w. rrier y frequenies in the rnge 300 to Hz woul provie high power output from the trnsmitter proue siens lile to use interferene use istortion of the rite signl use hrmonis in the trnsmitter r.f. output. 42 If the power mplifier of trnsmitter is generting prsiti osilltions, these re likely to e hrmonis of the osilltor frequeny su-hrmonis of the osilltor frequeny groupe roun the osilltor frequeny frequenies unonnete with the osilltor frequeny. 8

9 43 If trnsmitter is prouing key liks, these my e suppresse y sreening the le from the key to the trnsmitter inserting resistors onneting resistor n pitor in series ross the key ontts onneting the key to the trnsmitter vi keying rely. 44 Overmoultion is unesirle euse it reues trnsmitter output power uses the power mplifier to exee its mximum rtings results in the genertion of spurious siens uses the signl to e less esily rele. 45 The purpose of two-tone test is to hek ess to repeter sttion oupy free hnnel efore trnsmission provie sttion ientifition hek the opertion of s.s.. liner mplifiers. 46 Frequeny hirp in.w. trnsmitter is often ue to fst rise time of rrier envelope poor power supply regultion rio frequeny feek therml expnsion. 47 Trnsmitter outputs t 2 or 3 times the wnte frequeny re lle hrmonis key liks spltter spurious osilltions. 48 Spltter from single sien trnsmitter n often e minimise y reuing the mirophone gin output stning wve rtio stning urrent in the power mplifier single sien filter nwith. 49 A low pss filter following the power mplifier in single sien trnsmitter is esigne to prevent istorte uio frequeny rift spltter trnsmitter hrmonis Whih one of the following is n vntge;: of trnsistorise ron liner PA stges in trnsmitters? Goo hrmoni suppression. Nrrow nwith. Opertor onveniene. C:ro mthing to ll ntetuts. L R CI r o----!---l- FIG.0186 Fig shows filter use in the keying iruit of low power.w. trnsmitter. The purpose of the resistor in the iruit is to suppress the lik when epressing the key stilise the urrent so s to prevent hirp limit the ishrge urrent from the pitor suppress the lik when the key is relese. 52 Whih one of the following my e use to mesure urtely the frequeny of home-uilt trnsmitter tht overs the whole of the 3.5 to 3.8 MHz n? S.W.R. meter. Digitl frequeny meter. Asorption-type frequeny meter. Dip osilltor. 53 When using rystl osilltor in onjuntion with reeiver to ensure tht trnsmitter is operting within the limits of the 28.0 to 29.7 MHz n, the frequeny of the rystl shoul e 10kHz 100kHz 500kHz 1000kHz. 54 Whih one of the following tions is most likely to use interferene to eletroni equipment? Operting with the minimum power to mintin ontt. Using frequeny moultion in preferene to s.s.. Using oxil le to the ntenn whih is lote s f.u- from the eletroni equipment s possile. Using whip ntenn to keep the signl s lose s possile to the mteur sttion. See next pge

10 55 An mteur opertor shoul only use lss C liner mplifiers t their mximum rte power for s.s.. opertion mintin power levels t pproximtely 35 BW in urn res us full legl power t ll times use only the power neessry to mintin relile ommunition. 56 Digitl iruitry ontining rystl lok osilltor is likely to generte n infinite numer of hrmonis of the funmentl lok frequeny very nrrow n of interferene su-hrmoni interferene no interferene. 57 A severe urst of interferene lsting few seons isrupts reeption on rio sttion reeiver every 10 to 15 minutes. Whih one of the following is the most likely use? A ummy lo of the wrong resistne. A thermostt in tropil fish tnk. An eletri inution motor in hir ryer. A light immer swith. 58 A television reeiver is experiening interferene on soun from nery mteur trnsmitter. With the volume ontrol turne fully off, the rekthrough is still her. Whih stge of reeiver is eing ffete? Auio etetor. I.F mplifier. Auio output. R.E tuner. 59 Whih one of the following moes of enussion is lest likely to use uio rekthrough to nery uio equipment? Single sien reue rrier. Doule sien full rrier. Continuous wve telegrphy. Nrrow n frequeny moultion. lco}' F ~ ~ov FIG Fig shows the pre-mplifier stge of n uio mplifier. Whih pitor is use s r.f. eoupling? C 1. C2. C Whih one of the iruits elow represents low pss filter? ~ I I FIG An mteur h.f. trnsmission is inue into the mins supply. Wht is the most likely use? The ntenn feeer is situte too lose to the mins wiring. Inorret mins fuses fitte t the trnsmitter input. The mins supply line impene is too low. The trnsmitter is using trnsformer with opper sreen etween primry n seonry. 63 The erth onnetion for n mteur rio sttion shoul e to opper erth spike using le whih is me of rie mteril qurter of wvelength long s short s possile route longsie the mins supply le. 10

11 64 A ipole ntenn of n mteur trnsmitter fe with oxil le hs een fitte with 1:1 lun t its entre. Wht vntge woul this hve? The trnsmitter signl woul e ooste. Reeption woul e improve. The impene mth etween the ntenn n the trnsmitter woul e improve. The prevention of r.f. urrents flowing on the outer of the oxil le. 65 'When investigting interferene to lol television reeiver wht shoul e heke? The urrent rting of the reeiver mins le. The ri ormetion t the oxil plug. The fuse rting of the mins plug for the reeiver. The igonl length ross the reeiver sreen. 66 A neighour hs ompline n logge the interferene whih he lleges to e from n mteur trnsmitter. Wht shoul e the first tion tken y the mteur to estlish the likely use? Compre the mteur log with tht of the omplinnt for ny likely orreltion. Ask the lol offie of the Rioommunitions Ageny to investigte. Reue trnsmitter power on ll mteur ns. Fit ftlters to neighour's equipment. 67 'When instlling n mteur rio trnseiver in r the 12 V supply shoul e onnete iretly to the ttery with fuses in positive n negtive wires plugge into the igr lighter soket on the shor onnete to the interior light iruit supplie from the engine mngement system. 68 Polristion of rio wve is efine y the ngle t whih rio wve leves n ntenn egree to whih signl will e reflete from the D, E or F lyers iretion of the mgneti fiel iretion of the eletri fiel. 69 The troposphere is the region etween the erth n the F2 lyer erth n the D lyer E lyer n the F2 lyer E lyer n the Fl lyer. 70 Whih one of the following is minly responsile for signl fing in h.f. rio ommunitions? Clou over. Multi-pth reeption. A hole in the ozone lyer. Mismth in the ntenn system. 71 The length of qurter wve ntenn for use on the MHz n is pproximtely 140ms 70ms 35ms 17.5ms. ~ FIG The most stisftory fee rrngement for the ntenn in Fig is 50 Q oxil le with 4: I lun 75 Q oxil le with 1:1 lun 300.Q rion feeer 6oo.Q open wire line. 73 The type of le to e use when onneting trnsmitter, stning wve rtio meter, low pss filter, n n ntenn tuning unit is flt feeer single sreene twin sreene oxil. 74 Whih one of the following feeers introues the lowest losses? 50 Q oxil le. 75 Q oxil le. 300 Q rion feeer. 600 Q open wire feeer. 11 See next pge

12 + 250V R1 R2 FIG k0 10k0 75 Refer to Fig When using multi-ritge meter to mesure the voltge ross R2, the most suitle rnge woul e 0-lOOV (..) 0-IOOV(..) 0-250V (..) 0-250V (..). 76 A trnsmitter r.f. output power of 10 W is equivlent to 5BW lobw SOBW IOOBW 77 The.. power input to the flnl stge in trnsmitter is orretly me-.tsure y multiplying the pplie voltge y the olletor urrent multiplying the se urrent y the pplie voltge multiplying the lo impene y the squre of the olletor urrent iviing the squre of the pplie voltge y the lo impene. 78 A igitl frequeny meter, whose internl rystl hs n ury of 2 prts in lot', is use to mesure the frequeny of trnsmitter operting in the 14 MHz n. Whih one of the following frequenies for the mesure frequeny is the most meningful? MHz MHz MHz MHz. CJ 2p2 R'"l 22DR R2 2'2DR R3 2k2 C2 FIG The funtion of the oil L in the iruit of the s.w.r. rige shown in Fig is to nel the effet of ny pitne in the lo iruit provie smple of the output voltge provie smple of the output urrent nel the effet of ny inutne in the lo iruit. I \ I \ 02 1\ I \ / FIG The osillosope tre of Fig is otine t the ntenn soket of trnsmitter operting into 50.0: ummy lo. The osillosope mplitue ontrol is set to lov per ivision. The pek r.f. output power from the trnsmitter is 2.5W 4W BW 14W Dummy lo ' NOW GO BACK AND CHECK YOUR WORK BEFORE HANDING IN BOTH ANSWER SHEETS TO THE INVIGll.ATOR e IMPORTANT- Hve you fille in your nite numer in PENOL in the pproprite ox on the nswer sheets? Hve you fille in your nswers in PENOL in the pproprite oxes on the nswer sheets? CfL38770/ CE City & Guils.