ASE - Engine Repair Questions and Answers Already Passed

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ASE - Engine Repair Questions and Answers Already Passed Technician B says that Part 'X' is used to correct installed spring height. Who is right? ✔✔B. Technician B only A compression test sho... ws that one cylinder is too low. A leakage test on that cylinder shows that there is excessive leakage. During the test, air could be heard coming from the tailpipe. Which of the following could be the cause? ✔✔D. an exhaust valve not seating Technician A says that main bearing oil clearance can be checked with Plastigage. Technician B says that main bearing oil clearance can be checked with a dial bore gauge. Who is right? ✔✔C. Both A and B To raise the seat contact on the valve face shown above, which combination of stones should be used? ✔✔A. 45 degree and 60 degree stones A technician takes a compression reading on a 4-cylinder engine, and gets readings of 140, 135, 135,, and 40 psi. Then he preforms a wet compression test, and the readings are almost the same as those in the first test. Technician A says that a burned valve could cause these readings. Technician B says that a broken piston ring could cause these readings. Who is right? ✔✔A. Technician A only An engine is being rebuilt and the crankshaft connecting rod journals have been ground undersize. Specifications show that the original connecting rod journal size was 2.1228-in. 2.1236-in. If the journals now measure 2.1032-in., what size bearings should be used? ✔✔C. 0.020-in. undersize Camshaft lift is defined as: ✔✔B. the height of the lobes on the camshaft Technician A says that a burned valve could be the result of too little valve lash. Technician B says excessive valve lash could cause very fast camshaft wear. Who is right? ✔✔C. Both A and B Technician A says that engine cylinders wear most at the top of the ring travel. Technician B says that the difference in cylinder bore measurements taken parallel and perpendicular to the crankshaft will indicate cylinder bore taper. Who is right? ✔✔A. Technician A only A tapping noise can be heard coming from the upper part of an engine running at idle. Which of the following could be the cause? ✔✔D. all of the above An engine's upper and lower center main bearings show more wear than the ones toward either end of the crankshaft. Technician A says this wear pattern could be due to a bent crankshaft and replacing it with one that is straight will fix the problem. Technician B says that the cylinder block main bearing bores are misaligned and the problem can be fixed by align boring or honing the block. Who is right? ✔✔A. Technician A only Blue-gray smoke comes from the exhaust of a vehicle during deceleration. Of the following, which is the LEAST likely cause? ✔✔C. worn piston rings During a cylinder power balance test on the engine shown above, cylinder No. 5 and cylinder No. 7 were both found to be weak. Technician A says a blown head gasket could be the cause. Technician B says an ignition problem could be the cause. Who is right? ✔✔C. Both A and B All of the following methods can be used to find the cracks in aluminum heads EXCEPT: ✔✔B. magnetic particle detection Technician A says that before installing an oil pump, it should be primed with clean engine oil. Technician B says that before installing an oil pump, the position of the pickup screen should be checked to make sure it fits closely to the bottom of the oil pan. Who is right? ✔✔C. Both A and B Crankshaft journals should be measured for: ✔✔D. all of the above All of the following can cause low oil pressure EXCEPT: ✔✔B. worn pistons While conducting a cylinder leakage test, bubbles are seen in the coolant in the radiator. Technician A says a failed exhaust valve is the cause. Technician B says a failed intake valve is the cause. Who is right? ✔✔D. Neither A or B Technician A says the excessive grinding of valve faces and seats allows the valve tips to move too faraway from their spring seats. Technician B says grinding the stem tips helps to correct minor changes in valve spring installed height. Who is right? ✔✔A. Technician A only Technician A says that excessive cylinder head or block deck resurfacing on a pushrod engine can change the geometry between the valve stem tip and rocker arm. Technician B says the excessive grinding of the valve face and seat changes the geometry between the valve stem tip and rocker arm. Who is right? ✔✔C. Both A and B Due to the configuration of certain engines, air can be trapped in the cylinder head during a coolant drain and refill. Technician A says that this can cause a cracked head. Technician B states to unscrew the coolant temperature sending unit sufficiently to bleed the air. Who is right. ✔✔Both A and B The spring in Figure 1-2 is accidentally left out during an engine repair. Tech A says this will cause a blown oil filter. Technician B says that this will cause little or no oil pressure. Who is right? ✔✔Tech A only Valve X is figure 1-3 is stuck closed. Tech A states that this can cause the radiator hoses to collapse on cool-down. Tech B states that this can prevent coolant return to the radiator on cooldown. Who is right? ✔✔Both A and B The electric fan motor is figure 1-4 runs continuously. Tech A says that this could be caused by melted together fan relay contacts. Tech B states that this could be caused by a defective thermoswitch. Who is right? ✔✔Tech A only The cylinder heads are being installed on an engine. Some of the mounting bolt holes are "blind" and filled with oil. Tech A says that failure to clean these holes can result in an erroneous torque reading. Tech B states that failure to clean these holes can result in a cracked block. Who is right? ✔✔Both A and B Tech A states that part X in figure 1-6 can be replaced without removing the cylinder head. Tech B stats that part Y can be replaced without removing the cylinder head. Who is right? ✔✔Both A and B An exhaust valve has a seat contact pattern as shown in figure 1-7. What needs to be done? ✔✔Grind the seat with a 45 degree stone, and narrow it by "topping" Tech A states that oil can reach the combustion chamber because of a misaligned intake manifold gasket. Tech B states that oil can reach the combustion chamber because of a bad turbo. Who is right? ✔✔Both A and B You are measuring vacuum on an engine at sea level that is in good condition. The MOST NORMAL reading (at idle) would be: ✔✔17'' A compression test has been made on the engine in Figure 1-14. Cylinders 4 and 6 have reading of 60 psi. All other cylinders have readings between 130 and 135 psi. Tech A says that this could be caused by a "loose" timing chain. Tech B states that this could be cause by a blown head gasket. Who is right? ✔✔Tech B only A car has a coolant recovery system as shown in Figure 1-18. Coolant does not return to the radiator when the engine cools. Tech A states that the transfer hose could be plugged. Tech B states the filler neck soldered joint could be plugged.. Who is right? ✔✔Both A and B Tech A says that the rear main oil seal in Figure 1-26 is positioned backwards. Tech B states that the oil seals should be installed dry. Who is right? ✔✔Neither A nor B During a cylinder leakage test, the gauge reads 70% and air is heard coming from the exhaust pipe. What is MOST LIKELY cause? ✔✔Burned Valve The measure in Figure 1-40 ( see large arrows) has been set incorrectly. Tech A states that this can cause noise. Tech B states that this can cause rough idle. Who is right? ✔✔Both A and B What are overhauling a typical 4-cylinder automobile. Which of these would be the MOST NORMAL main bearing clearance specification? ✔✔.002 When making a compression test, a low equal reading is obtained in two adjacent cylinders. This would MOST LIKELY indicate a: ✔✔Blown head gasket A piston skirt shows a diagonal wear pattern across its length. This MOST LIKELY caused by an: ✔✔Twisted rod Tech A says the blue-gray smoke can be caused by piston rings stuck in their grooves. Tech B states that blue-gray exhaust smoke can be caused by plugged oil return passages in the cylinder head. Who is right? ✔✔Both A and B Technician A says that valve adjustment on the engine in figure 1-50 is made by changing part X. Technician B states that valve adjustment on the engine is made by changing part Y. Who is right? ✔✔Tech B Tech A states that a cracked cylinder head can cause engine overheating. Tech B states that a cracked cylinder head can cause to blow out of the tailpipe. Who is right? ✔✔Both A and B [Show More]

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