4TH CLASS ABSA EXAM PART A
PRACTICE WITH COMPLETE
SOLUTIONS
Absolute dpressure dis: d- dcorrect danswers d-gauge dpressure dplus datmospheric
dpressure
The dmotion dof dmoving dparts dis d_____ dby dfriction:
A: dPrevented
B: dImproved
C: dcontrolled
D: dresisted
E: dRegulated d- dcorrect danswers d-D: dresisted
Voltage dis
,a) dthe drate dof dcurrent dflow
b) dthe drate dof delectron dflow
c) delectromotive dforce
d) dKinetic denergy
e) dA dform dof dpower d- dcorrect danswers d-c) delectromotive dforce
The dresistance dof da dconductor dis daffected dby:
1. dCross dsection darea
2. dLength d
3. dTemperature
4. dType dof dmaterial d
a) d1,2,3
b) d1,2,4
c) d1,3
d) d1,2,3,4
e) d1,2 d- dcorrect danswers d-d) d1,2,3,4
The dmovement dof delectrons din da dconductor dcan dbe dmeasured din:
a) dAmperes
b) dOhms
c) dVolts
d) dWatts
e) dMicrometer d- dcorrect danswers d-a) dAmperes
An delectric dmotor dhas da d3/4 dhorse dpower doutput drating. dCalculate dthe drating din
dkilowatts:
a) d0.56
b) d0.75
c) d0.70
d) d7.5
e) d1.005 d- dcorrect danswers d-a) d0.56
The dconnection dprovided don dDC dmotors dto dsupply dthe darmature dwith dpower: d
a) dare dslip drings
b) dare dfield dposes
c) dis da drheostat
d) dcommutator
e) dis da drotating dconductor d- dcorrect danswers d-d) dcommutator
The dunit dfor dthe doppostion dto dcurrent dflow dis dthe:
,a) dvolt
b) damperes
c) dohm d
d) dwatt
e) dresistance d- dcorrect danswers d-c) dohm
In dan delectric dcircuit dprotected dby da dsingle dfuse dthe dcurrent dflowing dthrough dthe
dfuse dmust dbe:
a) dEqual dto dthe dvoltage din dthe dcircuit
b) dEqual dto dthe dresistance din dthe dcircuit
c) dAll dof dthe dcurrent din dthe dcircuit
d) dEqual dto dthe drated dvalue dof dthe dfuse
e) d1.732 dtimes dthe dapplied dcurrent d- dcorrect danswers d-d) dEqual dto dthe drated
dvalue dof dthe dfuse
Electric doverloads dmay dbe ddue dto
1. dApplying dtoo dheavy dload dto dan delectric dmotor
2. dLightning dstrike
3. dA dshort dcircuit
4. dOverloading da dcircuit dwith dtoo dmany ddevices
5. dAddition dof dcircuit dbreakers
a) d1,2,3,4
b) d1,3,4,5
c) d1,2,5
d) d2,3,4
e) d1,3,5 d- dcorrect danswers d-a) d1,2,3,4
Since dthe ddiscovery dof delectrons, dit dhas dbeen ddetermined dthat delectrons dare da
dnegative dcharge dand dflow dfrom:
Select done:
a. dpositive dto dnegative
b. dnorth dto dsouth
c. dsouth dto dnorth
d. da dlower dpotential dto da dhigher dpotential
e. da dhigher dpotential dto da dlower dpotential d- dcorrect danswers d-d
The dyoke dthat dsupports dthe dmain dcomponents dof dthe dDC dmachine dis dfrequently
dmade dof:
a) dCopper dor dbrass
b) dMica dand dcarbon
c) dCopper dand dcarbon
d) dCast dsteel dor diron
, e) dStainless dsteel d- dcorrect danswers d-d
Electrical dcurrent dflow dthrough da dconductor dis dcaused dby dthe ddrift dof: d
a) dPhotons d
b) dNeutrons d
c) dElectrons
d) dProteins
e) dProtons d- dcorrect danswers d-c
A ddevice dused dto dchange dthe dvoltage dand dcurrent dfrom done dlevel dto danother dis
dknown das:
a) dConductor
b) dResistor
c) dAlternator
d) dTransformer
e) dShunt d- dcorrect danswers d-d
Three dresistances dof d4, d8, d12, dOhms dare dconnected din dparallel din da dDC dcircuit.
dThe dtotal dresistance din dthe dcircuit dwill dbe:
a) d24 dohms
b) d12 dohms
c) d0.58 dohms
d) d0.46 dohms
e) d2.18 dohms d- dcorrect danswers d-e
A dthermocouple dconsists dof:
Select done:
a. dA dfilament dthat dis dcompared dto dthe dobject dbeing dmeasured
b. dTwo ddissimilar dwires dconnected dtogether
c. dTwo ddissimilar dwires dconnected dto da dbattery
d. dTwo dsimilar dwires dseparated dby danother dmetal
e. dTwo ddissimilar dwires dconnected dto da dcomputer d- dcorrect danswers d-b
The delectrical dresistance dof dthe dconductor don da dstrain dgauge dwill dincrease dwhen
da dtensile dforce dis dapplied dbecause dthe dwire dgrid dof dthe dstrain dgauge dwill:
a) dDecrease din dlength dand dcross-sectional darea
b) dIncrease din dlength dand dcross-sectional darea
c) dDecrease din dlength
d) dIncrease din dlength dand ddecrease din dcross-sectional darea
e) dDecrease din dcross-sectional darea d- dcorrect danswers d-d
Modulating dcombustion dcontrols:
PRACTICE WITH COMPLETE
SOLUTIONS
Absolute dpressure dis: d- dcorrect danswers d-gauge dpressure dplus datmospheric
dpressure
The dmotion dof dmoving dparts dis d_____ dby dfriction:
A: dPrevented
B: dImproved
C: dcontrolled
D: dresisted
E: dRegulated d- dcorrect danswers d-D: dresisted
Voltage dis
,a) dthe drate dof dcurrent dflow
b) dthe drate dof delectron dflow
c) delectromotive dforce
d) dKinetic denergy
e) dA dform dof dpower d- dcorrect danswers d-c) delectromotive dforce
The dresistance dof da dconductor dis daffected dby:
1. dCross dsection darea
2. dLength d
3. dTemperature
4. dType dof dmaterial d
a) d1,2,3
b) d1,2,4
c) d1,3
d) d1,2,3,4
e) d1,2 d- dcorrect danswers d-d) d1,2,3,4
The dmovement dof delectrons din da dconductor dcan dbe dmeasured din:
a) dAmperes
b) dOhms
c) dVolts
d) dWatts
e) dMicrometer d- dcorrect danswers d-a) dAmperes
An delectric dmotor dhas da d3/4 dhorse dpower doutput drating. dCalculate dthe drating din
dkilowatts:
a) d0.56
b) d0.75
c) d0.70
d) d7.5
e) d1.005 d- dcorrect danswers d-a) d0.56
The dconnection dprovided don dDC dmotors dto dsupply dthe darmature dwith dpower: d
a) dare dslip drings
b) dare dfield dposes
c) dis da drheostat
d) dcommutator
e) dis da drotating dconductor d- dcorrect danswers d-d) dcommutator
The dunit dfor dthe doppostion dto dcurrent dflow dis dthe:
,a) dvolt
b) damperes
c) dohm d
d) dwatt
e) dresistance d- dcorrect danswers d-c) dohm
In dan delectric dcircuit dprotected dby da dsingle dfuse dthe dcurrent dflowing dthrough dthe
dfuse dmust dbe:
a) dEqual dto dthe dvoltage din dthe dcircuit
b) dEqual dto dthe dresistance din dthe dcircuit
c) dAll dof dthe dcurrent din dthe dcircuit
d) dEqual dto dthe drated dvalue dof dthe dfuse
e) d1.732 dtimes dthe dapplied dcurrent d- dcorrect danswers d-d) dEqual dto dthe drated
dvalue dof dthe dfuse
Electric doverloads dmay dbe ddue dto
1. dApplying dtoo dheavy dload dto dan delectric dmotor
2. dLightning dstrike
3. dA dshort dcircuit
4. dOverloading da dcircuit dwith dtoo dmany ddevices
5. dAddition dof dcircuit dbreakers
a) d1,2,3,4
b) d1,3,4,5
c) d1,2,5
d) d2,3,4
e) d1,3,5 d- dcorrect danswers d-a) d1,2,3,4
Since dthe ddiscovery dof delectrons, dit dhas dbeen ddetermined dthat delectrons dare da
dnegative dcharge dand dflow dfrom:
Select done:
a. dpositive dto dnegative
b. dnorth dto dsouth
c. dsouth dto dnorth
d. da dlower dpotential dto da dhigher dpotential
e. da dhigher dpotential dto da dlower dpotential d- dcorrect danswers d-d
The dyoke dthat dsupports dthe dmain dcomponents dof dthe dDC dmachine dis dfrequently
dmade dof:
a) dCopper dor dbrass
b) dMica dand dcarbon
c) dCopper dand dcarbon
d) dCast dsteel dor diron
, e) dStainless dsteel d- dcorrect danswers d-d
Electrical dcurrent dflow dthrough da dconductor dis dcaused dby dthe ddrift dof: d
a) dPhotons d
b) dNeutrons d
c) dElectrons
d) dProteins
e) dProtons d- dcorrect danswers d-c
A ddevice dused dto dchange dthe dvoltage dand dcurrent dfrom done dlevel dto danother dis
dknown das:
a) dConductor
b) dResistor
c) dAlternator
d) dTransformer
e) dShunt d- dcorrect danswers d-d
Three dresistances dof d4, d8, d12, dOhms dare dconnected din dparallel din da dDC dcircuit.
dThe dtotal dresistance din dthe dcircuit dwill dbe:
a) d24 dohms
b) d12 dohms
c) d0.58 dohms
d) d0.46 dohms
e) d2.18 dohms d- dcorrect danswers d-e
A dthermocouple dconsists dof:
Select done:
a. dA dfilament dthat dis dcompared dto dthe dobject dbeing dmeasured
b. dTwo ddissimilar dwires dconnected dtogether
c. dTwo ddissimilar dwires dconnected dto da dbattery
d. dTwo dsimilar dwires dseparated dby danother dmetal
e. dTwo ddissimilar dwires dconnected dto da dcomputer d- dcorrect danswers d-b
The delectrical dresistance dof dthe dconductor don da dstrain dgauge dwill dincrease dwhen
da dtensile dforce dis dapplied dbecause dthe dwire dgrid dof dthe dstrain dgauge dwill:
a) dDecrease din dlength dand dcross-sectional darea
b) dIncrease din dlength dand dcross-sectional darea
c) dDecrease din dlength
d) dIncrease din dlength dand ddecrease din dcross-sectional darea
e) dDecrease din dcross-sectional darea d- dcorrect danswers d-d
Modulating dcombustion dcontrols:
