JOURNEYMAN OPEN BOOK PRACTICE EXAM #21|
COMPLETE SOLUTION RATED A+ | 2024
where extensive metal in or on buildings or structures may become energized and is
subject to personal contact _______ will provide additional safety.
a) adequate bonding and grounding
b) bonding
c) suitable ground detectors
d) none of these - a) adequate bonding and grounding
single conductor cables shall be ______ or larger and shall be of a type listed for use in
cable trays.
(a) #1 (b) #1/0 (c)#4/0 (d)#250 kcmil - (b) #1/0 392.10 (B1)
The grounded conductor, when insulated, shall have insulation _____
I. rated not less than 300 volts for solidly grounded neutral systems of 2 kv and over as
described in section 250.184
II. which is suitable, other than color, for any ungrounded conductor of the same circuit
on circuits of less than 1000 volts.
a) I only b) II only c) either I or II d) neither I or II - B) II only 200.2 (A)
which of the following is not true regarding rigid nonmetallic conduit?
a)extreme cold may cause some nonmetallic conduits to become brittle and therefor
more susceptible to damage from physical contact 352.10
b) can be used to support luminaires
c) all cut ends shall be trimmed inside and outside to remove rough edges 352.28
d) expansions joints shall be provided to compensate for thermal expansion and
contraction. 352.44 - b) can be used to support luminaires
lighting track conductors shall be a minimum _____ AWG or equal, and shall be coper.
a) #16 b)#14 c)#12 d)#10 - c)#12
RTRC conduit 2" in size shall be securely fastened within 3' of each box and
horizontally a maximum of _____ between supports.
, a) 5' b) 6' c) 7' d) 10' - a) 5' 355.30
Cablebus shall be installed only for _____ work.
a) exposed b)commercial c) =concealed d)hazardous - a) exposed 370.10 (1)
knife switches rated for more than 1,200 amperes at 250 volts ____.
a) dare dused donly das disolating dswitches d
b) dshould dbe dplaced dso dthat dgravity dtends dto dclose dthem
c)should dbe dopened dslowly dunder dload
d)should dbe dconnected dso dblades dare dnot ddead din dopen dposition d- d da) dare dused donly das
disolating dswitches d404.13 d(A)
a dtranserve dmetal draceway dfor delectrical dconductors, dfurnishing daccess dtp
dpredetermined dcells dof da dprecast dcellular dconcrete dfloor, dwhich dpermits dinstallation dof
dconductors dfrom da ddistribution dcenter dto dthe dfloor dcells dis dcalled____.
a) dan dunderfloor draceway d
b) da dheader
c) da dcellular draceway
d) da dmandrel d- d db) da dheader d372.
Because daluminum dis dnot da dmagnetic dmetal, dthere dwill dbe dno dheating ddue dto d_______.
a) delectrolysis db) dhysteresis dc) dhermetic dd) dgalvanic daction d- d db) dhysteresis d300.20 dinfo
dnote
Luminaires dshall dbe dconstructed, dor dinstalled, dor dequipped dwith dshades dor dguards dthat
dcombustible dmaterial dwill dnot dbe dsubjected dto dtemperatures din dexcess dof d_______.
a) d90 dF db) d86 dF dc) d30 dC dd) d90 dC d- d dd) d90 dC d410.11
overhead dtrack dand dhoist dsystem dfor dmoving dmaterial daround dthe dboatyard dor dmoving
dor dlaunching dboats dis dthe ddefinition dof da d_______.
a) dmonorail db) dboat dlift dc) dtrack dhoist dd) dboat djack d- d da) dmonorail d555.2
all dcut dends dof drigid dconduit dshall dbe d______. d
a) dthreaded db) delectrically dcontinuous dc) dreamed dd) dcut dsquare d- d dc) dreamed d344.28
what dsize dconductor dshall dbe dconnected dbetween dthe dground dgrid dand dall dmetal dparts
dof dswimming dpools?
a) d#8 db) d#10 dc) d#6 dd) d#4 d- d da) d#8 d680.26 d(B)
COMPLETE SOLUTION RATED A+ | 2024
where extensive metal in or on buildings or structures may become energized and is
subject to personal contact _______ will provide additional safety.
a) adequate bonding and grounding
b) bonding
c) suitable ground detectors
d) none of these - a) adequate bonding and grounding
single conductor cables shall be ______ or larger and shall be of a type listed for use in
cable trays.
(a) #1 (b) #1/0 (c)#4/0 (d)#250 kcmil - (b) #1/0 392.10 (B1)
The grounded conductor, when insulated, shall have insulation _____
I. rated not less than 300 volts for solidly grounded neutral systems of 2 kv and over as
described in section 250.184
II. which is suitable, other than color, for any ungrounded conductor of the same circuit
on circuits of less than 1000 volts.
a) I only b) II only c) either I or II d) neither I or II - B) II only 200.2 (A)
which of the following is not true regarding rigid nonmetallic conduit?
a)extreme cold may cause some nonmetallic conduits to become brittle and therefor
more susceptible to damage from physical contact 352.10
b) can be used to support luminaires
c) all cut ends shall be trimmed inside and outside to remove rough edges 352.28
d) expansions joints shall be provided to compensate for thermal expansion and
contraction. 352.44 - b) can be used to support luminaires
lighting track conductors shall be a minimum _____ AWG or equal, and shall be coper.
a) #16 b)#14 c)#12 d)#10 - c)#12
RTRC conduit 2" in size shall be securely fastened within 3' of each box and
horizontally a maximum of _____ between supports.
, a) 5' b) 6' c) 7' d) 10' - a) 5' 355.30
Cablebus shall be installed only for _____ work.
a) exposed b)commercial c) =concealed d)hazardous - a) exposed 370.10 (1)
knife switches rated for more than 1,200 amperes at 250 volts ____.
a) dare dused donly das disolating dswitches d
b) dshould dbe dplaced dso dthat dgravity dtends dto dclose dthem
c)should dbe dopened dslowly dunder dload
d)should dbe dconnected dso dblades dare dnot ddead din dopen dposition d- d da) dare dused donly das
disolating dswitches d404.13 d(A)
a dtranserve dmetal draceway dfor delectrical dconductors, dfurnishing daccess dtp
dpredetermined dcells dof da dprecast dcellular dconcrete dfloor, dwhich dpermits dinstallation dof
dconductors dfrom da ddistribution dcenter dto dthe dfloor dcells dis dcalled____.
a) dan dunderfloor draceway d
b) da dheader
c) da dcellular draceway
d) da dmandrel d- d db) da dheader d372.
Because daluminum dis dnot da dmagnetic dmetal, dthere dwill dbe dno dheating ddue dto d_______.
a) delectrolysis db) dhysteresis dc) dhermetic dd) dgalvanic daction d- d db) dhysteresis d300.20 dinfo
dnote
Luminaires dshall dbe dconstructed, dor dinstalled, dor dequipped dwith dshades dor dguards dthat
dcombustible dmaterial dwill dnot dbe dsubjected dto dtemperatures din dexcess dof d_______.
a) d90 dF db) d86 dF dc) d30 dC dd) d90 dC d- d dd) d90 dC d410.11
overhead dtrack dand dhoist dsystem dfor dmoving dmaterial daround dthe dboatyard dor dmoving
dor dlaunching dboats dis dthe ddefinition dof da d_______.
a) dmonorail db) dboat dlift dc) dtrack dhoist dd) dboat djack d- d da) dmonorail d555.2
all dcut dends dof drigid dconduit dshall dbe d______. d
a) dthreaded db) delectrically dcontinuous dc) dreamed dd) dcut dsquare d- d dc) dreamed d344.28
what dsize dconductor dshall dbe dconnected dbetween dthe dground dgrid dand dall dmetal dparts
dof dswimming dpools?
a) d#8 db) d#10 dc) d#6 dd) d#4 d- d da) d#8 d680.26 d(B)
