1.
ASE T2: General Engine Diagnosis
If a technician observes oil in the coolant of a diesel engine, what is the MOST probable cause?
1 out of 55
2.
ASE T2: General Engine Diagnosis
During the inspection of a diesel engine, a technician notes that the oil pressure is fluctuating erratically at all engine speeds. Which of the following could be the primary cause of this condition?
2 out of 55
3.
ASE T2: General Engine Diagnosis
A diesel engine is experiencing excessive white smoke during startup. Which of the following is LEAST likely to be the cause?
3 out of 55
4.
ASE T2: General Engine Diagnosis
When diagnosing an electronic diesel fuel injection system, a technician finds that the engine starts and then stalls immediately. Which of the following is MOST likely the cause?
4 out of 55
5.
ASE T2: General Engine Diagnosis
A diesel engine's performance has degraded over time, and the engine exhibits delayed acceleration. The fuel filter and air intake system are clean. What should be checked NEXT?
5 out of 55
6.
ASE T2: General Engine Diagnosis
A diesel engine with common-rail fuel injection fails to reach its normal operating temperature. Which of the following would be the LEAST likely reason for this condition?
6 out of 55
7.
ASE T2: General Engine Diagnosis
What could be a potential cause for a diesel engine to have abnormal noise and vibration only at high RPMs?
7 out of 55
8.
ASE T2: General Engine Diagnosis
What is the MOST likely cause for a diesel engine to experience increased fuel consumption along with a noticeable decrease in power?
8 out of 55
9.
ASE T2: General Engine Diagnosis
What is the MOST likely cause of a diesel engine producing blue smoke only at engine startup?
9 out of 55
10.
ASE T2: General Engine Diagnosis
Which of the following symptoms would indicate a problem with the diesel engine's compression release engine brake system?
10 out of 55
11.
ASE T2: General Engine Diagnosis
In a unit injector diesel system, which of the following conditions could cause one cylinder to misfire?
11 out of 55
12.
ASE T2: Cylinder Head and Valve Train Diagnosis and Repair
During a cylinder head repair on a diesel engine, the technician notices that the valve seats are pitted and worn. Which of the following actions should be taken?
12 out of 55
13.
ASE T2: Cylinder Head and Valve Train Diagnosis and Repair
When performing a valve train diagnosis, the technician finds that the pushrod is bent. Which of the following is a common cause for this condition?
13 out of 55
14.
ASE T2: Cylinder Head and Valve Train Diagnosis and Repair
A diesel engine is experiencing intermittent misfiring and a loss of compression. The technician suspects a problem in the cylinder head area. Which of the following is MOST likely the cause?
14 out of 55
15.
ASE T2: Cylinder Head and Valve Train Diagnosis and Repair
A diesel engine with an overhead camshaft design is producing a loud ticking noise from the valve train area. The noise increases with engine RPM. Which of the following could be the cause?
15 out of 55
16.
ASE T2: Engine Block Diagnosis and Repair
A diesel engine block has been found to have a small crack after a coolant system pressure test. Which of the following repair methods is recommended for a high-pressure diesel engine block?
16 out of 55
17.
ASE T2: Engine Block Diagnosis and Repair
During the inspection of a diesel engine block, the technician notices excessive main bearing wear. What could be the primary cause of this condition?
17 out of 55
18.
ASE T2: Engine Block Diagnosis and Repair
A diesel engine has been overhauled, and the technician has opted to use oversized pistons. What additional engine block repair must be performed to accommodate these pistons?
18 out of 55
19.
ASE T2: Engine Block Diagnosis and Repair
When measuring the cylinder bore of a diesel engine, the technician finds out-of-round conditions exceeding manufacturer specifications. What is the MOST likely cause of this condition?
19 out of 55
20.
ASE T2: Engine Block Diagnosis and Repair
After a complete engine rebuild, a technician notices that the diesel engine exhibits low oil pressure at idle when fully warmed up. The oil pump and pressure relief valve have been replaced. What is the MOST likely cause?
20 out of 55
21.
ASE T2: Lubrication and Cooling Systems Diagnosis and Repair
When performing a cylinder cutout test, a technician finds that the engine temperature drops unexpectedly on one cylinder. What could be the reason for this phenomenon?
21 out of 55
22.
ASE T2: Lubrication and Cooling Systems Diagnosis and Repair
While diagnosing a diesel engine cooling system, a technician finds the coolant has a high pH level. What type of engine damage can this condition cause?
22 out of 55
23.
ASE T2: Lubrication and Cooling Systems Diagnosis and Repair
A technician needs to test the operation of the oil pressure relief valve on a diesel engine. Which of the following procedures is correct?
23 out of 55
24.
ASE T2: Lubrication and Cooling Systems Diagnosis and Repair
A diesel engine is experiencing premature bearing wear. A technician suspects the oil cooler might be at fault. What could be the specific cause related to the oil cooler contributing to this problem?
24 out of 55
25.
ASE T2: Lubrication and Cooling Systems Diagnosis and Repair
A technician notes that a diesel engine consistently runs hotter than normal, yet the coolant level and thermostat function are satisfactory. What could be the likely cause?
25 out of 55
26.
ASE T2: Lubrication and Cooling Systems Diagnosis and Repair
During an oil change service on a diesel engine, a technician observes that the oil has a frothy appearance. What is the most likely cause?
26 out of 55
27.
ASE T2: Air Induction and Exhaust Systems Diagnosis and Repair
If a diesel engine's exhaust system is modified with a larger diameter pipe, what effect can this have on the engine's performance?
27 out of 55
28.
ASE T2: Air Induction and Exhaust Systems Diagnosis and Repair
A technician is diagnosing an exhaust system problem on a diesel engine. The exhaust has a blue tint and the engine oil level is dropping rapidly. What is the primary cause of this issue?
28 out of 55
29.
ASE T2: Air Induction and Exhaust Systems Diagnosis and Repair
When diagnosing an engine that is not reaching its full rated power, the technician observes that the turbocharger boost is lower than specifications. All other systems are functioning properly. What is the most likely cause?
29 out of 55
30.
ASE T2: Air Induction and Exhaust Systems Diagnosis and Repair
During the inspection of a diesel engine's air induction system, a technician discovers oil in the charge air cooler CAC. What is the most likely cause of this condition?
30 out of 55
31.
ASE T2: Air Induction and Exhaust Systems Diagnosis and Repair
A diesel engine exhibits low power and poor acceleration. The technician notes excessive black smoke from the exhaust. What could be the likely cause?
31 out of 55
32.
ASE T2: Air Induction and Exhaust Systems Diagnosis and Repair
What is a potential consequence of a defective air induction system pressure sensor in a diesel engine?
32 out of 55
33.
ASE T2: Fuel System Diagnosis and Repair
A diesel engine with common-rail fuel injection is experiencing higher than normal fuel temperatures. What could be the cause of this condition?
33 out of 55
34.
ASE T2: Fuel System Diagnosis and Repair
When diagnosing a diesel engine that is difficult to start, a technician should check the fuel system for all of the following EXCEPT:
34 out of 55
35.
ASE T2: Fuel System Diagnosis and Repair
A diesel engine is producing white smoke continuously while running. This could be due to:
35 out of 55
36.
ASE T2: Fuel System Diagnosis and Repair
If a diesel fuel injector is producing a chuffing sound at idle, what is the most probable cause?
36 out of 55
37.
ASE T2: Fuel System Diagnosis and Repair
During the testing of an electronic diesel fuel injection system, it is found that one injector is not delivering fuel. The LEAST likely cause for this condition is:
37 out of 55
38.
ASE T2: Fuel System Diagnosis and Repair
What could be the consequence of excessive return flow from diesel injectors?
38 out of 55
39.
ASE T2: Fuel System Diagnosis and Repair
A diesel engine's performance has deteriorated and it produces a knocking sound. A technician suspects incorrect fuel timing. Which of the following would be the most direct method of checking fuel timing?
39 out of 55
40.
ASE T2: Fuel System Diagnosis and Repair
After replacing the fuel filters on a diesel engine, the engine runs for a short period and then stalls. The primary cause could be:
40 out of 55
41.
ASE T2: Fuel System Diagnosis and Repair
When a diesel engine exhibits symptoms of hard starting and erratic idling after a hot soak, the fault is most likely related to:
41 out of 55
42.
ASE T2: Fuel System Diagnosis and Repair
While performing a cylinder balance test on a diesel engine, one cylinder shows no change in engine speed or sound when cut out. Before disassembling the engine, the technician should FIRST:
42 out of 55
43.
ASE T2: Fuel System Diagnosis and Repair
A technician finds that a diesel engine is running with a slightly blue smoke and a misfire on one cylinder. After inspection, the most probable cause is determined to be:
43 out of 55
44.
ASE T2: Fuel System Diagnosis and Repair
During a dynamic fuel system test, a diesel engine demonstrates a drop in rail pressure when demand increases. This symptom is most likely caused by:
44 out of 55
45.
ASE T2: Fuel System Diagnosis and Repair
What would be a likely cause for diesel fuel to be found in the engine oil during an oil change?
45 out of 55
46.
ASE T2: Fuel System Diagnosis and Repair
What condition is indicated by a diesel engine's fuel filter housing being empty of fuel after sitting overnight?
46 out of 55
47.
ASE T2: Fuel System Diagnosis and Repair
A technician is diagnosing a common rail diesel engine that exhibits excessive noise and vibration. The most likely cause of this condition is:
47 out of 55
48.
ASE T2: Fuel System Diagnosis and Repair
During a performance test, a diesel engine reveals a lack of power and black smoke from the exhaust. The LEAST likely cause would be:
48 out of 55
49.
ASE T2: Starting and Charging System Diagnosis and Repair
During the inspection of a diesel engine starting system, a technician finds that the starter does not disengage after the engine has started. The cause of this issue is MOST likely:
49 out of 55
50.
ASE T2: Starting and Charging System Diagnosis and Repair
A diesel engine cranks excessively before starting. Technician A says that a possible cause is low cranking speed due to a weak battery. Technician B says that high resistance in the starting circuit could be the cause. Who is correct?
50 out of 55
51.
ASE T2: Starting and Charging System Diagnosis and Repair
A diesel engine's alternator is not charging the battery at idle but begins to charge as engine RPM increases. The MOST likely cause is:
51 out of 55
52.
ASE T2: Starting and Charging System Diagnosis and Repair
A diesel engine starter motor operates slowly and the battery is fully charged. The MOST likely cause for this condition is:
52 out of 55
53.
ASE T2: Engine Brakes
The timing of an engine brake is critical to its operation. This timing is primarily affected by the:
53 out of 55
54.
ASE T2: Engine Brakes
When diagnosing an engine brake that fails to activate, which of the following electrical checks should be performed first?
54 out of 55
55.
ASE T2: Engine Brakes
The activation of an engine brake in a diesel engine results in increased:
55 out of 55
