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18 Delphi笔试题目(第1页)

18。Delphi笔试题目

机械类笔试试题

1。Brieflydescribewhatisblanking(g),f,dembossinginstampingprocess。

2。Whatismetalg?

3。Whatisthepurposeofaddingglassfibertothermoplasticmaterial?

4。Intrastwithmetalaicmaterial,whichhasahighertofthermalexpansion(CTE)。

5。Themostsuitablematerialfralhiypicalplastiess=0。25to0。5mmathinge)

6。dingloadmakesbothpressivearessinamember?

7。Whatisthedesigncriteriausedinplasticsap?

8。WhatisFEA?

9。Whyisnaturalfrequencyimportantinvibrationanalysis?

10。Whatisthedefleequationofatileverbeamfixedatoneedge?

EE笔试试题

1。Name3VehicleBuses。

2。Name2possiblesourceserfereronicsCircuitA**。

3。Wavelengthfor12MHzfrequenalis____

4。aionsforaoaudiosignalprodermultipath?

5。WhatisthetypicalFMreceiverRFsigoachieve30dBSNforcarradio?

6。Whenaradioistuo98。1MHz&withaLOof108。8MHz,whatistheimagefrequency?

7。ForasystemedaistheRefletandSWR?

8。WhichpropertyoftheoutputcapacitoristheprimarycauseofLowDropulatorloopinstability?

&seriesresistance(ESR)

&iveseriesinduce(ESL)

(3)cevalue

(4)Dielectricmaterial

9。Theswitgregulatoriscapableof:

(1)Higherpowerefficy

(2)Providinganoutputvoltagethatishighertha

&inganoutputboltageoppsiteinpolaritytotheinput

(4)Alloftheabove

10。AlioropVin(max)=10v,Vout(min)=4。8v,Iout(max)=2。5mA,Iq(max)=2。5mA,Ta(max)=8。5摄氏度,Theregulatorisavailablein3packages。Eachpackagehasthefollowingthermalcharacteristics:

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