Computer Shopper 125/Computer Shopper CD-ROM Issue 125 (1998-07)(Dennis Publishing).iso/EuroPhys/Database/Electric/exam/Script/Aexam1.exm

Text File | 1997-07-29 | 3.0 KB | 131 lines

@data 'Charged'
@examPages question,checklist,answer
@more 1,3
@page 1
@AtGraphic 401,6
@picture elefh1a1.bmp
@At 131,26
#f4Liquids become electrically charged when
they pass quickly through a narrow opening.



@At 86,81
#b1.#b #^Explain why the paint spray in the diagram above spreads out.

@at ,+4
#t#v160
@at ,+4
#t#v160  [2]
@at ,+8
#b2.#b #^If the spray has a positive charge, what charge should be on the metal tube, if any at all?
@at ,+4
#t#v160  [1]
@at ,+8

#b3.#b #^When aircraft are refuelled a lot of fuel is pumped very quickly through a pipe from a
#ttanker to the aircraft.  Why is this dangerous?
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160
@at ,+4
#t#v160  [4]
@at ,+8

#b4.#b #^To make refuelling safe, a metal conductor is connected between the tanker and the aircraft.
#tHow does this make refuelling safe?
@at ,+4
#t#v160
@at ,+4
#t#v160  [2]
@prompt








@more 2,3
@page 2
@At 100,370
#f4#cr#bClick on the answers you wrote down for each section of this question.
@AtGraphic 401,6
@picture elefh1a1.bmp
@At 131,26
#f4Liquids become electrically charged when
they pass quickly through a narrow opening.



@At 86,81
#b1.#b #^Explain why the paint spray in the diagram above spreads out.

@at ,+4
#ox#t#%  Liquid droplets are charged with the same charge.#%#v160  [1]
@at ,+4
#ox#t#%  The same (or like) charges repel.#%#v160  [1]
@at ,+8
#b2.#b #^If the spray has a positive charge, what charge should be on the metal tube, if any at all?
@at ,+4
#ox#t#%  A negative charge should be on the metal tube ( unlike charges attract).#%#v160  [1]
@at ,+8

#b3.#b #^When aircraft are refuelled a lot of fuel is pumped very quickly through a pipe from a
#ttanker to the aircraft.  Why is this dangerous?
@at ,+4
#ox#t#%  Fuel droplets could become charged.#%#v160  [1]
@at ,+4
#ox#t#%  This in turn might produce a spark.#%#v160  [1]
@at ,+4
#ox#t#%  The spark would be produced upon entering the aircraft fuel tank.#%#v160  [1]
@at ,+4
#ox#t#%  If this were the case the vapour would become ignited.#%#v160  [1]
@at ,+8

#b4.#b #^To make refuelling safe, a metal conductor is connected between the tanker and the aircraft.
#tHow does this make refuelling safe?
@at ,+4
#ox#t#%  The tanker and the aircraft will be like charged.#%#v160  [1]
@at ,+4
#ox#t#%  Two like charges will #bnot#b produce a spark.#%#v160  [1]
@prompt







@more 3,3
@page 3
@At 260,59
You scored #z4 out of #z5.
@At 253,111
This is a grade #z6

@iffailedGrade
@At 98,173
You did not get the grade you were hoping for. It is recommended that you
study the following:

@At 229,214
#bModule  #^:#b #^Electricity and Magnetism
#bSection#t:#b Charge
#bArea#t:#b Detecting charge
#bArea#t:#b + and - charge
#bArea#t:#b Insulations and conductors
#bArea#t:#b Sparking
@At 167,324
#crClick on Forward to return to the exam selection menu.
@endif
'@At 100,370
'#f4#cr#bClick on the answers you wrote down for each section of this question.
@prompt