A hydro boost brake system has a hard pedal and reduced braking performance. Which of the following
would result in this condition? - correct answer ✔✔Aerated power steering fluid
One of a vehicle's brake lights is inoperative. All other lights are functioning normally. Which of the
following should be checked first? - correct answer ✔✔The bulb
results in a soft spongy brake pedal - correct answer ✔✔aerated brake fluid
is a one way air valve used on a vacuum brake booster systems. A hydroboost brake booster uses fluid
pressure, and a vacuum brake booster uses vacuum pressure. - correct answer ✔✔vacuum check valve
produces pressure for the hydroboost unit - correct answer ✔✔power steering pump
uses pressure from the poer steering system instead of vacuum as a source of power assist. - correct
answer ✔✔hydroboost system
a loss of power steering pressure will have a significant effect on the - correct answer ✔✔hydroboost
brake assist booster
in order to diagnose hydroboost brake booster that isn't vacuum operated - correct answer ✔✔check
the power steering belt and inspect the lines and hoses for leaks
The TPMS warning light goes out after driving the vehicle for several miles. The MOST likely cause of this
condition is: - correct answer ✔✔Low tire air pressure
An out of round tire causes - correct answer ✔✔vibration that increases with vehicle speed
A weak or dead TPMS battery will - correct answer ✔✔illuminate the TPMS warning light
, A faulty wheel speed sensor will affect - correct answer ✔✔an indirect TPMS system
A rear-wheel-drive vehicle with an automatic transmission has a vibration that increases with vehicle
speed. There is a loud clunk when the transmission is shifted from park to drive or reverse. Which of the
folling is causing this condition? - correct answer ✔✔Loose and worn Universal Joints
An unbalanced driveshaft would ____, but cause no clunking sounds. - correct answer ✔✔cause
vibration with vehicle speed
Loose flywheel bolts cause - correct answer ✔✔noise in manual transmissions
Loose and worn universal joints cause _____. As the joint wears, it can become loose and lose vital
lubrication. - correct answer ✔✔clunking noises when shifting gears and vibration in the driveline as
vehicle speed increases
An oil filter has ballooned on a four-cylinder engine. Technician A says a stuck closed oil filter bypass
valve would cause this swelling. Technician B says a stuck open oil pressure valve would cause this
swollen oil filter. Who is correct. - correct answer ✔✔Technician A
The ____ opens to prevent high oil pressure in the engine. It typically contains a spring that allows just
enough oil to bypass the system and return to the oil pan. - correct answer ✔✔oil pressure relief valve
Installing the oil pressure relief valve backwards will result in - correct answer ✔✔no oil pressure at all
The _____ creates oil pressure that forces the oil to flow to the oil filter - correct answer ✔✔oil pump
A stuck open oil pressure valve results in - correct answer ✔✔unfiltered oil
A stuck closed oil pressure bypass valve results in - correct answer ✔✔swelling of the oil filter