Multiple choice question paper

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1 City~Guils Multiple hoie question pper Pper numer ~~ Exmintion Rio Amteurs Mony 10My 1999 Series My 1999 Pper Written Y. hours You shouj hve the following for this exmintion this question pper You my refer to the tthe n nswer sheet Sheule to help in nswering pen with lk or lue ink ny of the questions. MC This question pper is the property of The City n Guils of Lonon Institute n is to e returne fter the exmintion. Re the following notes BEFORE you nswer ny questions. You must use pen with lk or lue ink to omplete ALL prts of the nswer sheet. Chek tht you hve the orret nswer sheet. Print your nme in the ox provie on the nswer sheet. Eh question shows FOUR possile nswers (lettere '', '', '' n ''), only ONE is orret. Deie whih ONE is orret n mrk your ANSWER SHEET with your PEN. 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 G:J 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 pper. Attempt ll questions; if you fin question iffiult, leve it n return to it lter. This pper ontins 80 questions; nswer them using the 'oxes' numere 1 to 80 on the nswer sheet. See next pge

2 1 One of the qulifitions require for n Amteur Rio Liene (A) is tht the pplint must e over 16 yers of ge hve pi the fees for the Rio Amteurs Exmintion hve psse the Morse Test hve pplie to tke the Morse Test. 2 Whih one of the following esigntes.lss of liene issue y the Seretry of Stte for mteur rio trnsmission? ~ CB. B. M. In the 'Arn.teur Rio liene (A) or (B) Terms, Provisions n limittions Booklet BR68', wireless telegrphy mens ny permitte type of trnsmission Morse n t only Morse, RTIY, t, fsimile, SSTV only ll types of trnsmission exept telephony. In the onitions of use of n Amteur Rio Liene 'Temporry Lotion' mens the ress s set out in the Vlition Doument lotion other thn the Min Sttion Aress, in the Unite Kingom, n in fixe position lotion in the Unite Kingom in vehile or s peestrin lotion on ny vessel t se or in inln wters. "Whih one of the following is lu ll sign? GDlXYZ. GM!XYZ. GS1XYZ. GU1XYZ. 6 The essentil requirement for log Book is tht it must hve no fewer thn 20 pges e otine from the RSGB e loose-lef not e loose-lef. 7 Certin mteur h.f. ns my e use for onununition in times of rekown of the interntionl puli orresponene servies interntionl isster ommunitions propgtion iffiulties with the mritime moile servie propgtion iffiulties with the eronutil servie. 8 The liensee my use the sttion for non-peuniry tivities on ehlf of registere politil orgnistion non-profit mking orgnistion for the furtherne of mteur rio religious orgnistion profit mking soil orgnistion. 9 The holer of n Amteur Rio Liene (A) my llow the sttion to e operte, uner his/her supervision, y representtive of the Rioommunitions Ageny n offier of the Rio Investigtion Servie the holer of n mteur rio liene from ny ountry Citizen "s Bn liene holer. 10 In whih one of the following my the holer of n Amteur Rio Liene (A) or (B) operte? Any ountry whih is memer of the Interntionl Teleommunition Union. A ountry whih hs implemente CEI'f Reommention T/R Only those ountries whih re memers of the Europen Community. Only those ountries whih re memers of the British Conunonwelth. 11 The Liensee shll permit person uthorise y the Seretry of Stte to hve ess to the Sttion n to rry out n inspetion for the purpose of verifying tht the sttion hs een operte uring the preeing 12 months tht the sttion hs een operte uring the preeing 6 months the liensee hs signe every log entry ompline with the terms of the liene. 12 The Amteur Rio liene sttes tht the liensee shll test his trnsmissions for rition of hrmonis n other spurious emissions n reor suh tests in the log one month one every three months t the request of n offier of the Deprtment of Tre n Inustry from time to time. 13 "Whih one of the following suffixes must e use y the liensee when the sttion is operte moile?!m. /MA. /MM. fp 2

3 14 The liensee my sen rost messges for generl reeption y other mteurs reore mteril suh s musi or speehes signls (not eniphere) whih form pn of, or relte to, the trnsmission of messges eniphere signls whih form prt of, or relte to, the trnsmission of messges. 15 To whih one of the following ountries my greetings messges e sent y non-liense persons if liene is hel on ehlf of lu? Bermu. Cyprus. Cnry Islns. Flkln Islns. 16 The Regionl Seonry Lotor M refers to Sotln Wles Isle of Mn Engln. 17 In whih one of the following wvens is there low power segment? 80 metres. 30 metres. 6 metres. 2 metres. 18 Whih one of the following frequenies is outsie n uthorise mteur n? 51.00MHz MHz MHz MHz. 19 The holer of n Amteur Rio Liene A is operting from temporry premises in Wles. Whih one of the following must e use to ientify the sttion? G2Z:ZZ/A n the lotion. GW2ZZZ/A n the ress of the temporry premises. GM2ZZZ/ A n the temporry ress. GW2ZZZ/P n the lotion. 20 When operting n mteur trnsmitting sttion, exept uring utomti opertions involving igitl ommunitions, log must e kept initing ll signs of sttions with whih ommunitions hve een estlishe. Other informtion whih must e reore inlues reeive signl strength initils of the liensee CQ lls iretion of ntenn. 21 To minimise the power requirements of stellite trnsponer, the preferre metho of moultion is frequeny moultion rio teleprinter (RTfY) single sien television. 22 The revition RST mens Rio Seletivity Test Reility, Signl Strength, Tone Reeiving Stnr Trnsmission Rio Stnr Time. 23 Bn plnning is liene requirement minimises interl'erene etween ifferent moes is only pplile ove 30 MHz is only pplile elow 30 MHz. 24 The phoneti lphet s set out in the Liene gives some protetion from intereption y thir prties is ompulsory must e onfine to the wors set out in the liene shoul e use y the liensee. 25 In the interest of sfety in the sttion n isoltor swith shoul e instlle. The MOST importnt feture is tht the swith shoul e pinte re n illuminte shoul e illuminte with the wor DANGER ove it must hve its funtion n position known y ll memers of the househol must e mounte high enough to e our of reh of hilren. 3 See next pge

4 "' ~~-----t ~ TIME Input r---<>v+, J--o Output FIG.l 26 Fig. 1 shows sine wve. The root meim squre (r.m.s.) vlue of the voltge is of the mximum vlue the sme s the men vlue the squre root of the mximum vlue of the mximum vlue. 27 Whih one of the following funtions CANNOT e rrie out y power trnsformer? Chnge given supply voltge to one of higher vlue. Chnge given supply voltge to one of lower vlue. Supply given urrent to lo urrent whose impene iffers gretly from tht of the soure of supply. Provie higher power output from low-power soure of supply. 28 A trnsmitter hs n output power of SOW. This is equivlent to OBW 7BW 17BW 20BW x-t= FIG.2 29 In the FET symol Fig. 2, the onnetion mrke X is the rin noe gte soure. o-----_.----~~----~v. FIG.3 30 Refer to Fig. 3 whih shows typil trnsistor swithing iruit. The purpose of R2 is to Vin provie se is keep the trnsistor swithe-off when no input signl is present prevent self-osilltion when signl is present provie some mplifition. 1\1 Trl FIG.4 R2 1\3 1\4 31 In Fig. 4, trnsistor Trl is onnete s ommon-olletor mplifier voltge regultor ommon-se mplifier power mplifier. 32 Whih ontrol shoul e juste to prevent strong signl overloing the first stges of reeiver? AF gin. BFO. RF gin. Squelh. 33 A ommunitions reeiver hs n intermeite frequeny of 1.6 MHz. When using the reeiver on 7.05 MHz strong interferene is use y rost sttion operting on MHz. The interferene is likely to e use y poor imge frequeny rejetion ross moultion rekthrough hrmoni rition. 4

5 34 When use for the reeption of AlA signls the.f.o. in superhet reeiver is swithe off tune to ner the lol osilltor frequeny tune to ner the intermeite frequeny tune to n uio frequeny. 35 An moming,;gnl 'uenly mrese' in signl strength. The utomti gin ontrol 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 The most serious onsequene of n unstle rrier woul e tht the reeiving sttion woul hve iffiulty reeiving the signl trnsmissions oul interfere with television reeivers trnsmissions oul interfere with other mteurs trnsmission oul move outsie the uthorise n. Spurious emissions from the output stge of single sien trnsmitter n e use y non-linerity of the output stge n unstlise power supply n untune olletor iruit the trnsistor not hving het sink. 36 A frequeny synthesiser provies n output of MHz. If the phse-loke loop is out of lok it mens tht there will e high v.s. w.r. exessive output will e proue the trnsmitte frequeny will e extly MHz the trnsmitte frequeny will e unontrolle. 37 The purpose of uffer stge in trnsmitter is to provie mple power to rive the power mplifier stge isolte the osilltor stge from stges requiring rive power protet the river stge from over moultion provie the mjor prt of mplifition of the moulte power. 38 Too lrge n uio signl pplie to frequeny moulte trnsmitter uses rition of hrmonis exessively wie siens overheting of the power mplifier proution of prsiti osilltions. 39 A ummy lo for us when testing trnsmitter shoul e resonnt t the frequeny uner test inutively retive with n impene equl to tht of the ntenn system to e use inutively retive with n impene equl to the output of the trnsmitter uner test non-retive with resistne equl to the output impene of the trnsmitter uner test. 42 The rition of hrmonis from n mteur trnsmitter my e use y the power mplifier stge eing over-riven keying high urrent iruit in the trnsmitter the power supply to the river stge eing unregulte r.f. eing inue in the mins supply to the trnsmitter. 43 Whih one of the following hs the gretest effet on the totl nwith oupie y Morse trnsmission? Type of key use. Keying spee. Keying wveform. Trnsmitter power. 44 Trnsmitter outputs t two or three times the wnte frequeny re lle 45 hrmonis key liks spltter spurious osilltions. The SUREST wy of eteting the presene of prsiti osilltions is y tuning through the ns on television reeiver using reeiver overing h.f., v.h.f. n u.h.f. frequenies tuning reeiver through the mteur n to whih the trnsmitter is tune tuning n f.m. reeiver through the MHZ n. 5 See next pge

6 46 Whih one of the following types of spurious 52 W'hen using rystl lirtor in signls whih n e her on reeiver, is onjuntion with reeiver to ensure tht use y poor reeiver esign? trnsmitter is operting within the limits of Prsiti osilltion. the 28.0 to 29.7 MHz n, the frequeny of Chirps. the rystl shoul e Sien spltter. 10kHz Seon hnnel interferene. 100kHz kHz OvermouJtion is unesirle euse it 1000kHz. reues trnsmitter output power uses the power mplitier to ex:gee its 53 Whih one of the tollowing my e use to mximum rtings mesure urtely the frequeny of home-uilt trnsmitter tht overs the whole results in the genertion of spurious of the 3.5 to 3.8MHz n? sien" uses the signl to hve nrrower SWRmeter. nwith. Digitl frequeny meter. Asorption-type frequeny meter. 48 The rition of hrmonis y n h.f. Dip osilltor. trnsmitter n e minimise y the use of low pss rio frequeny fllter t 54 "Whih one of the following tions is most the output of the trnsmitter likely to use interferene to eletroni introution of smll prllel equipment? omintions of inutne n Operting with the minimum power to resistne very lose to the ffete mintin ontt. trnsistor h Using frequeny moultion in use of high pss filter in the power preferene to s.s.. mplifier stge of the trnsmitter Using oxil le to the ntenn neutrlising of the power mplifier stge. whih is lote s fr from the eletroni equipment s possile. 49 Whih one of the following mterils is use Using whip ntenn inoors. to sreen unwnte rition from trnsmitter r.f. stges? 55 An mteur opertor shoul Le. only use lss C liner mplifiers t their PTFE. mximum rte power for s.s.. Ferrite. opertion Aluminium. mintin power levels t pproximtely 35 BW in urn res 50 Key liks rite y trnsmitter my e use full legl power t ll times reue y use only the power neessry to orret ising of the p.. mintin relile onununition. fitting ferrite es on the Morse key les 56 The ring ontts of fulty thermostt slowing rise n fll times of the keye n use intetferene over wie envelope frequeny n using low pss flltr. will lwys use interferene over nrrow frequeny n 51 Whih one of the following lsses of use interferene on single frequeny mplifition is most likely to proue only hrmonis when use in the p.. stge of my e ure y repling the trnsmitter? thermostt with silion ioe. Clss A. Clss AB. 57 "Whih one of the following items, will Clss B. generte single, nrrow n signl? Clss C. Sttion trnsmitter. Snning reeiver. Sttion omputer. Sttion nlogue multimter. 6

7 58 A neighour's television reeiver is oserve to suffer Joss of olour, poor synhronistion of the piture n ptterning on ll TV hnnels when n mteur trnsmits nery on 18.1 MHz. The prolem is most likely to e use y i.f. rekthrough uio rekthrough ross moultion of r.f. stges rition vi the min supply. 59 TV reeiver loking or esensitising is use y h lowering the ntenn height mljustment of the volume ontrol justing squelh or mute ontrol inorretly interfering strong r.f. signls. 60 The funtion of ferrite ring use to reue rio frequeny interferene entering n uio mplifier vi the speker onneting les is to inrese the impene of the speker les t uio frequenies trp the interfering signls in irulting urrents within the ring minimise the istortion of the uio frequenies inrese the impene to r.f. urrents flowing in the speker les. 61 An uio mplifier is experiening rek-through from two metre mteur trnsmission. Whih pitor woul e suitle r.f. eoupling omponent? 100 IJF eletrolyti. 10 IJF tntlum pf ermi. 0.5 pf silver mi. 1mH ---- ~ _IO.OipF TO.Olp.F n flo.olp.f ~-Ol,..F 1 mh FIG.5 62 Fig. 5 shows the iruit of evie whih my e onnete in the mins supply to trnsmitter. Its use is to reue the presene of hrmonis rite prevent mins orne interferene ffeting the opertion of the trnsmitter prevent r.f. energy from the trnsmitter entering the puli mins supply prevent mins hum eing present on the moultion of n.m. trnsmitter. 63 A pi-network is high-pss fl.lter low-pss fllter n-pss Itlter n-stop filter. 64 An mteur sttion ontts istnt sttions to the west. The only neighour is on the est sie of the sttion. Whih one of the following trnsmitting ntenns will minimise the risk of interferene to the neighour? Vertil ipole. Horizontl ipole. Ygi. Long wire. 65 The nwith of speeh trnsmission shoul e kept s nrrow s possile in orer to mintin goo speeh qulity use minimum of interferene reue high voltge trnsients in the p.. stge help reue istortion y the emoultor in the reeiver. 66 When n mteur reeives omplint of using interferene to neighour's television set, whih of the following is the est ourse of tion for the mteur? Tell the neighour tht the television set is t fult. Refer the prolem to television eler. Disuss possile remey with the neighour. Refer omplinnt to the RIS. 7 See next pge

8 67 A trnsmitter instlle in r shoul e lote t le"it one metre from the ttery s lose to the wiring loom s possile wy from ny of the r's eletroni units s lose to the irg s possile. 68 A trnsmitte wve is vertilly polrise when its mgneti omponent is vertil the ntenn is pointing north in "the northern hemisphere the ntenn is prllel to the groun its eletril omponent is vertil. 69 At night, ionospheri propgtion in the.frequeny rnge 3 MHz to 30 MHz is usully hieve y mens of the F lyer reomintion of ions the D lyer spori-e refletion. The most ommon use of fing in the h.f. ns is vrition in trnsmitter output power ttenution of the groun wve signls rriving y ifferent pths mislignment of iretionl trnsmitting ntenn. Whih one of the following shows the urrent istriution in hlf wvelength ipole ntenn? ~-- / ' / ' / / / -- ~r _?JI FIG.6 -- ' 73 Refer to Fig. 6. At whih point shoul lun e fitte? A. B.. D. 74 The hrteristi impene of lne feeer, spe 150 mm, is pproximtely sn son oon. 75 A voltmeter suitle for mesuring the se voltge of trnsistor must 76 e ttery operte hve low resistne hve high resistne ontin moving-oil initor. The.. input to the fml mplifier of n h.f. trnsmitter is 1.5A t 30V. If the stge is operte in Clss C n is refully mthe to the output lo, resonle output power woul e out 45W 30W 20W 15W TRANSCEtvf (X)AXIAL CABLE , I I : p : II I. L, J I 72 A horizontl hlf wve ipole for the 18 MHz n is 10 metres ove groun. The impene t the entre is pproximtely Q 150Q 300Q. 77 FIG. 7 Fig. 7 shows ummy lo onnete to trnseiver. Whih one of the following woul e suitle for P? r.f. mmeter... mmeter. r.f. voltmeter... voltmeter. 8

9 78 When heke ginst the stnr Frequeny Servie trnsmission on 20 MHz, the igitl re-out of trnseiver inites MHz. If the trnseiver is to e operte 5 khz ove the low frequeny en of the lbmhz n, wht must pper on the igitl re-out? MHz MHz MHz MHz. 79 A 50!l ummy lo for use with 3 W trnsmitter my e onstrute using single 50 Q 3 W rte wirewoun resistor three 50 Q 1 W rte ron resistors onnete in prllel three 50 Q 1 W rte ron resistors onnete in series three 150 n 1 W rte ron resistors onnete in prllel. 80 I \ I \ I \ I \ Grtiule of CRO is mrke in 1 em squres FIG.S A sinewve is isplye on the sreen of n osillosope s shown in Fig. 8. If the times is set to give sweep of 200 lls/m wht is the frequeny of the wveform? 1250Hz. 2500Hz. 5000Hz Hz. NOW GO BACK AND CHECK YOUR WORK e IMPORTANT- Hve you printe your nme in INK in the pproprite ox on the nswer sheet? Hve you fille in your nswers in INK in the pproprite oxes on the nswer sheet? CTL40922/ o8. CE City & Guils.