ASE A1 - Practice Test (Section E) Documen term 2 set 8

9. all of the following statements regarding manifold heat control valves are true EXCEPT: - a manifold heat control valve improves fuel vaporization in the intake manifold especially when the engine is cold - a manifold heat control valve stuck in the closed position causes a loss of engine power - a manifold heat control valve stuck in the open position may cause an acceleration stumble - a manifold heat control valve stuck in the closed position reduces intake manifold temperature

a manifold heat control valve stuck in the closed position reduces intake manifold temp ~the exhaust manifold on carbureted and throttle body injected engines may be equipped with a manifold heat control valve. if the manifold heat control valve is stuck open or fails to close when the engine is cold, the engine may stumble during acceleration. if the valve is stuck in the closed position, engine power will be reduced and the intake manifold will overheat.

A2. the LEAST LIKELY cause of excessive blue smoke in the exhaust of a turbocharged engine is: a PCV valve stuck in the open position worn turbocharger seals worn valve guide seals worn piston rings

a pcv valve stuck in the open position

A80. the LEAST LIKELY cause of an oil saturated pcv filter is: worn piston rings an obstructed pcv vacuum hose a stuck open pcv valve a clogged pcv valve

a stuck open pcv valve

A24. air filters should be replaced after every 12,000 miles after every 15,000 miles after every 3,000 miles according to mfrs recommendations

according to mfrs recommendation

A38. a battery load or capacity tester, as shown in the figure, is used to test the battery capacity. during this test, the battery is discharged at 1/2 the CCA for 15 sec 20 sec 25 sec 30 sec

15 seconds

55. the following statements about distributor advances are true EXCEPT: -the vacuum advance controls spark advance in relation to engine load -the mechanical advance controls spark advance in relation to engine speed -the mechanical advance rotates the reluctor in the opposite direction of the shaft rotation -the vacuum advance rotates the pickup plate in the opposite direction to shaft rotation

-the mechanical advance rotates the reluctor in the opposite direction of the shaft rotation

A104. when blowing out an air filter element, how far should the gun be from the inside of the element 5 inches 6 inches 7 inches 8 inches

6 inches

10. A says an intake manifold vacuum leak may cause a cylinder misfire with the engine idling. B says an intake manifold vacuum leak may cause a cylinder misfire during hard acceleration... A B Both Neither

A only an intake manifold vacuum leak at idle may cause a cylinder misfire condition. an intake manifold vacuum leak will not cause a misfire condition during hard acceleration when the vacuum is lower. manifold vacuum is reduced during acceleration. Therefore, the leak would not contribute to cylinder misfire

A15. A says that the spark timing adjustment procedures for a vehicle can be found on an underhood label for all cars built since 1972. B says that on any engine with a distributor, spark timing can be adjusted by rotating the distributor with respect to the cylinder block (cylinder head) A B Both Neither

A only spark timing adjustment procedures for a vehicle can be found on an underhood label for all cars built since 1972. But, on some engines equipped with a distributor, ignition timing is not adjustable by rotating the distributor

A116. A says that when installing an intake manifold that uses synthetic rubber seals at the front and rear ends, the top and bottom of the rubber seals should be coated with silicone sealer. B says that only a dab of silicone sealer should be placed at the very ends of the seals A B Both Neither

B only coating both sides of the rubber seals increases the likelihood that the seals will be squeezed out of place when the intake manifold bolts are tightened.

A17. a starter is being installed in a vehicle. A says that all starters require shims to be installed. B says that measurements must be taken to determine the need for shims on certain vehicles only A B Both Neither

B only shims are not required for all starter but measurements should be taken to determine shim need.

A13. a new starter motor has been installed on an engine and the tech installed the original shim between the starter and the block. when the engine is cranked, a loud whining noise is heard. A says that there is too little clearance, B says too much clearance A B Both Neither

B only. excessive clearance between the starter pinion gear and flywheel ring gear may cause a loud whining noise

A77. A says an exhaust manifold heat control valve stuck in the closed position causes a loss of engine power. B says an exhaust manifold heat control valve stuck in open position may cause an acceleration stumble A B Both Neither

Both a manifold heat control valve that is stuck closed may reduce engine power output and may cause acceleration stumble

A82. an engine equipped with electronic fuel injection has a loose exhaust manifold. A says that a loose manifold may cause noisy engine operation. B says that the loose manifold may cause poor vehicle driveability A B Both Neither

Both on an engine equipped with electronic fuel injection, a loose intake manifold may cause both engine noise and poor vehicle drivability

A11. A says that the mechanical advance weights in a distributor cause the pickup or breaker plate to rotate in a direction opposite that of distributor shaft rotation. B says that the vacuum advance rotates the distributor cam or reluctor in a direction opposite that of distributor shaft rotation. A B Both Neither

Neither -the mechanical advance weights rotate the cam or reluctor in the direction of distributor shaft rotation. -the vacuum advance rotates the pickup or breaker plate in a direction opposite that of distributor shaft rotation

A115. A says too much turbo boost can result in a damaged wastegate diaphragm. B says too much turbo boost can result in bent compressor wheel blades A B Both Neither

Neither too much turbo boost will not cause either

4. while cleaning a pleated paper-type air filter element, the air gun should be held: away from the outside of the air filter element directly against the outside of the air filter element directly against the inside of the air filter element away from the inside of the air filter element

away from the inside of the air filter element ~when cleaning a pleated paper-type air filter element using compressed air, hold the air gun tip about 6 inches from the inside of the filter element -air should be blown from the inside out to remove particles, and air forced into the filter are too short of a distance may damage the filter.

A70. the figure shows the pcv system. all of the following are symptoms of a stuck open pcv valve EXCEPT: blowby gases in the air filter the engine stalling rough idle operation a lean air/fuel ratio

blowby gases in the air filter

48. when installing a starter motor, shims may be required by some manufacturers to adjust the gap between the starter pinion gear and flywheel ring gear. adding a 0.015 inch shim between the starter motor and the engine block will: decrease the clearance by 0.005 decrease the clearance by 0.015 increase the clearance by 0.010 increase the clearance by 0.005

increase the clearance by 0.005. ~adding a 0.015 inch shim will increase clearance by 0.05 inch

58. a battery rated at 600 CCA is load tested at 1/2 its rated CCA for 15 seconds. the results show 10.1 volts. the results indicate that this battery: is satisfactory needs recharging is bad and should be replaced should be retested at load for 30 seconds

is satisfactory

45. the hose from the positive crankcase ventilation valve to the intake manifold is restricted. this problem could result in an acceleration stumble oil accumulation in the air cleaner engine surging at high speed engine detonation during acceleration

oil accumulation in the air cleaner - a pcv valve stuck open may casue acceleration stumble -restricted pcv hose would not cause the engine to surge at high speed, nor would it lead to engine detonation

A32. the following specific gravity readings were taken from a battery at 80 degrees F. Cell 1: 1.200 |Cell 2: 1:210 |Cell 3: 1.190 |Cell 4: 1.200 Cell 5: 1.205 |Cell 6: 1.200 what action should be taken? load test the battery replace the battery refill the battery with fresh electrolyte recharge the battery

recharge the battery -battery should not load tested since it is discharged. the specific readings do not vary enough between cylinders to warrant battery replacement. the battery should not be refilled with fresh electrolyte; just recharged.

A122. while inspecting the intake manifold from a v-type engine, a tech notices a crack in the exhaust gas crossover passage on the underside of the manifold. the most likely cause of this condition is -the intake manifold bolts were overtorqued -the intake manifold bolts were not torqued in the correct sequence -the EGR passage in the manifold is plugged with carbon -the heat riser valve on one of the exhaust manifolds is stuck shut

the heat riser valve on one of the exhaust manifolds is stuck shut ~a stuck shut heat riser valve will force exhaust gases through the underside of the intake manifold at all times, resulting in the manifold overheating and possibly cracking.

50. reduced turbocharger boost pressure may be caused by a: wastegate valve stuck closed wastegate valve stuck open leaking wastegate diaphragm disconnected wastegate linkage

wastegate valve stuck open all others would INCREASE boost pressure