Cooling Systems Crossword Puzzle

QUESTIONS LIST:

• scaling: caused by hard water mineral deposits (especially magnesium and calcium) adhering to the surfaces of the cooling system where temperatures are highest.
• cavitation: caused by vapor bubble collapse, which results in pitting of the exterior of the liner wall across the thrust faces of the piston. it may also occur at the inlet to the water pump.
• ethyleneglycol: is derived from ethylene oxide, which in turn is produced from ethylene—a basic petroleum fraction.
• propyleneglycol: is derived from propylene oxide, which is produced from propylene—another basic petroleum fraction.
• conducton: heat transfer through solid matter.
• convection: heat transfer by currents of gas or liquids.
• radiation: heat transfer by rays not requiring matter.
• radiators: are heat exchangers. the engine power rating usually dictates the frontal area of a radiator, typically 3 to 4 square inches per b h p unit. the cooling medium is ram air.
• waterpumps: are usually nonpositive, centrifugal pumps driven directly by a gear or by belts.
• thermisters: are solid-state, semiconductor devices whose internal resistance varies with temperature change.
• winterfronts: installed on the hood grille to limit the amount of ram air driven through the engine compartment, can load a fan off its axis.
• shutters: are sets of louver-like slats that pivot on shafts and are interconnected to rotate in unison from a fully open to a closed position in much the same manner as a set of venetian blinds.