ENGINE REPAIR (A1) No. of Questions= 10 Pass mark is - 75 %. You can press the Mark it button at the bottom of the page to have the quiz marked. Please attempt all questions. You need 75% to progress. 1. Two technicians are discussing pressure testing the cooling system to check for leaks. Technician A says to pump up the system to 20 to 25 psi and watch for the pressure to drop. Technician B says that each component of the cooling system should be pressure checked individually by disconnecting it from the system. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 2. A coolant pump has been replaced three times in three months. Technician A says that the drive belt(s) may be installed too tightly. Technician B says that a cooling fan may be bent or out of balance. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 3. A compression test gave the following results: cylinder #1: 155 cylinder #2: 140 cylinder #3: 70 cylinder #4: 135 Technician A says that a leaking intake manifold gasket could be the cause. Technician B says that a defective (burned) valve is the most likely cause. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 4. Technician A says that a double knocking noise is likely to be due to a cam bearing. Technician B says that if a engine knocks, only when the engine is cold is usually due to a worn piston. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 5. Two technicians are discussing a compression test. Technician A says that the engine should be turned over with the pressure gauge installed for "2 puffs." Technician B says that the maximum difference between the highest-reading cylinder and the lowest-reading cylinder should be 20%. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 6. Technician A says that oil should be squirted into all of the cylinders before taking a compression test. Technician B says that if the compression greatly increases when some oil is squirted into the cylinders, it indicates defective or worn piston rings. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 7. During a cylinder leakage (leak-down) test, air is noticed coming out of the oil filler opening. Technician A says that the oil filter may be clogged. Technician B says that the piston rings may be worn or defective. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 8. A cylinder leakage (leak-down) test indicates 30% leakage, and air is heard coming out of the air inlet. Technician A says that this is a normal reading for a slightly worn engine. Technician B says that one or more intake valves are defective. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 9. Two technicians are discussing a cylinder power balance test. Technician A says the more the engine RPM drops, the weaker the cylinder. Technician B says that all cylinder RPM drops should be within 50 RPM of each other. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B 10. Technician A says that cranking vacuum should be the same as idle vacuum. Technician B says that a sticking valve is indicated by a floating valve gauge needle reading. Which technician is correct? a) Technician A only b) Technician B only c) Both Technician A and B d) Neither Technician A nor B Go to top of quiz © 2004 Prentice Hall. All Rights Reserved.
No. of Questions= 10 Pass mark is - 75 %. You can press the Mark it button at the bottom of the page to have the quiz marked.