Chapter 15: Engine Cooling System
Questions With Correct Answers
The bengine bcooling bsystem b- bcorrect banswer b✔✔the bengines binternal bcombustion
bsystem btakes bplace bat babout b4,500 bdegrees bfahrenheit. bApproximately bone-third
bof bthe bheat bproduced bby bcombustion bis bconverted binto bthe bengines bpower.
bAnother bthird bis bremoved bthrough bthe bexhaust bsystem. bThat bstill bleaves bone-third
bof bthe bheat bthat bis bdissipated bby bthe bengine bcooling bsystem. bIt bis ba bsealed band
bpressurized bsystem bthat buses ba bcombination bof bequal bparts bwater band bcoolant
Coolant/antifreeze b- bcorrect banswer b✔✔Coolant/antifreeze bis badded bto bthe bwater
bto bincrease bthe bboiling btemperature bof bthe bmixture. bOtherwise, bthe bwater bwould
bevaporate bat bthe bengines bhigh btemperatures. bThe baddition bof bcoolant bkeeps bthe
bmixture bfrom bfreezing bin bthe bwinter band bthe bengine bfrom brusting. bMost
bcoolant/antifreeze bcontains ba bsubstance bcalled bethylene bglycol, balthough bsome
buse bpropylene bglycol, bwhich bis bnon btoxic band bless bharmful.
Water bPump b- bcorrect banswer b✔✔the bwater bpumps bthe bwater-coolant bmixture
bthrough bthe bengine bcooling bsystem bvia ba blower bradiator bhose. bThe bwater bpump
bis bpowered bby ba bv bor bserpentine bbelt battached bto bthe bcrankshaft. bOn bcars bwith
bmechanical bfans bthe bwater bpump bis bgenerally bright bbehind bthe bfan. bOn bcars bwith
belectric bfans bthe blocation bvaries. bOn bsome bcars bthe bwater bpump bserves btwo
bpurposes: bdriving bthe bfan band bcirculating bcoolant
Water bjackets b- bcorrect banswer b✔✔The bcoolant bmixture bis bcirculated bthrough
bareas bcalled bwater bjackerts bthat bsurround bthe bengine bcylinders band bother bengine
bhot bspots. bThe bheat bof bthe bcylinders bis btransferred bto bthe bcool bliquid bbeing
bcirculated.
Fan b- bcorrect banswer b✔✔a bfan bmounted bbehind bthe bradiator bpulls bcool boutside
bair bthrough bthe bradiator, bcooling bthe bwater-coolant bmixture bas bit btravels bthrough
bthe bradiator. bThere bare btwo btypes bof bfans belectrical band bmechanical. bMechanical
bfans bare bmainly bon bpick bup btrucks. bThe bmechanical bfans boperates bby bmeans bof
ba bv-belt bor bserpentine bbelt bthat bconnects bto bthe bcrankshaft. bThe bnumber bof bfan
bblades bvaries. bMost bprivate bpassenger bcars bhave belectric bfans
Questions With Correct Answers
The bengine bcooling bsystem b- bcorrect banswer b✔✔the bengines binternal bcombustion
bsystem btakes bplace bat babout b4,500 bdegrees bfahrenheit. bApproximately bone-third
bof bthe bheat bproduced bby bcombustion bis bconverted binto bthe bengines bpower.
bAnother bthird bis bremoved bthrough bthe bexhaust bsystem. bThat bstill bleaves bone-third
bof bthe bheat bthat bis bdissipated bby bthe bengine bcooling bsystem. bIt bis ba bsealed band
bpressurized bsystem bthat buses ba bcombination bof bequal bparts bwater band bcoolant
Coolant/antifreeze b- bcorrect banswer b✔✔Coolant/antifreeze bis badded bto bthe bwater
bto bincrease bthe bboiling btemperature bof bthe bmixture. bOtherwise, bthe bwater bwould
bevaporate bat bthe bengines bhigh btemperatures. bThe baddition bof bcoolant bkeeps bthe
bmixture bfrom bfreezing bin bthe bwinter band bthe bengine bfrom brusting. bMost
bcoolant/antifreeze bcontains ba bsubstance bcalled bethylene bglycol, balthough bsome
buse bpropylene bglycol, bwhich bis bnon btoxic band bless bharmful.
Water bPump b- bcorrect banswer b✔✔the bwater bpumps bthe bwater-coolant bmixture
bthrough bthe bengine bcooling bsystem bvia ba blower bradiator bhose. bThe bwater bpump
bis bpowered bby ba bv bor bserpentine bbelt battached bto bthe bcrankshaft. bOn bcars bwith
bmechanical bfans bthe bwater bpump bis bgenerally bright bbehind bthe bfan. bOn bcars bwith
belectric bfans bthe blocation bvaries. bOn bsome bcars bthe bwater bpump bserves btwo
bpurposes: bdriving bthe bfan band bcirculating bcoolant
Water bjackets b- bcorrect banswer b✔✔The bcoolant bmixture bis bcirculated bthrough
bareas bcalled bwater bjackerts bthat bsurround bthe bengine bcylinders band bother bengine
bhot bspots. bThe bheat bof bthe bcylinders bis btransferred bto bthe bcool bliquid bbeing
bcirculated.
Fan b- bcorrect banswer b✔✔a bfan bmounted bbehind bthe bradiator bpulls bcool boutside
bair bthrough bthe bradiator, bcooling bthe bwater-coolant bmixture bas bit btravels bthrough
bthe bradiator. bThere bare btwo btypes bof bfans belectrical band bmechanical. bMechanical
bfans bare bmainly bon bpick bup btrucks. bThe bmechanical bfans boperates bby bmeans bof
ba bv-belt bor bserpentine bbelt bthat bconnects bto bthe bcrankshaft. bThe bnumber bof bfan
bblades bvaries. bMost bprivate bpassenger bcars bhave belectric bfans
