1.
A wet compression test is being performed on a four cylinder engine. The number two cylinder is low and the compression reading stays the same after adding oil. Technician A says the engine needs piston rings. Technician B says the engine has a faulty valve. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
2.
An engine is making a knocking sound that changes with RPM, and the noise disappears while a cylinder is being tested during the cylinder balance test. Which of the following could be the cause?
A. 
B. 
C. 
D. 
3.
A power balance test is being performed. Technician A says to note the engine RPM before and during the test for each cylinder. Technician B says to record the RPM drop for each cylinder. Who is right?
A. 
B. 
C. 
D. 
Neither Technician A or B
4.
7. A technician installs a radiator pressure tester on the radiator of a cold engine. After starting the engine the pressure quickly rises to 18 psi. Technician A says this is a normal condition. Technician B says the engine has a leaking cylinder head gasket. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
5.
A vehicle has heavy white smoke emitting from its tailpipe at all engine speeds. The cause of this problem is:
A. 
B. 
C. 
D. 
6.
The engine coolant's specific gravity (freeze point) can be measured by which tool?
A. 
B. 
C. 
Cooling System Pressure Tester
D. 
7.
Technician A says a supercharger uses an intercooler to keep the engine's oil cool. Technician B says intercoolers are used on turbochargers to keep the oil cool. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
8.
Two technicians are discussing a turbocharged engine. Technician A says the wastegate is a component used to control boost pressure. Technician B says when opened the wastegate diverts exhaust gas from the turbine wheel. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
9.
During a cylinder leakage test air bubbles appear coming from the radiator neck. Technician A says this may be caused by a leaking intake valve. Technician B says the engine may have a crack in the engine block. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
10.
This question is not like the others. It has the word EXCEPT. For this question, look for the choice that could NOT cause the described situation. Read the entire question carefully before choosing your answer.
All of the following are reasons why you must disable the fuel injection system and ignition system when conducting an engine compression test, EXCEPT:
A. 
Prevents damage to the ignition system during the test
B. 
Prevents fuel injection into the cylinders
C. 
D. 
Prevents inaccurate readings
11.
An engine has a noise that goes away as the engine warms and reaches operating temperature. Which of these is the most likely cause.
A. 
B. 
Loose connecting rod bolt
C. 
D. 
12.
A vehicle vibrates only when placed in reverse. The most likely cause of this condition is:
A. 
B. 
C. 
D. 
13.
A vehicle's cooling system is loosing coolant. There is major corrosion around the aluminum water pump. Which of these are the most likely cause.
A. 
B. 
C. 
D. 
14.
A power balance test is being performed. Technician A says to note the engine RPM before and during the test for each cylinder. Technician B says to record the RPM drop for each cylinder. Who is right?
A. 
B. 
C. 
D. 
Neither Technician A or B
15.
What engine seal is pictured in the illustration to the right?
A. 
B. 
C. 
D. 
16.
The reading on the micrometer indicates:
A. 
B. 
C. 
D. 
17.
During a cylinder leakage test air bubbles appear coming from the radiator neck. Technician A says this may be caused by a leaking intake valve. Technician B says the engine may have a crack in the engine block. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
18.
Technician A says the ridge must be removed before installing new pistons. Technician B says a ridge reamer is used. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
19.
A cylinder power balance test is being performed on a vehicle with sequential fuel infection. The #5 cylinders RPM drop is less than all of the others. Technician A says this could be due to a restriction in the fuel injector. Technician B says this could be due to leaking secondary insulation. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
20.
A compression test is being performed on a vehicle. The #1 cylinder is 30lbs. lower than specifications. The pressure increases after injecting oil into the cylinder. Technician A says that excessive carbon buildup is the cause of this condition. Technician B says the results of this test indicate one of the cylinders valves are defective. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
21.
The least likely to cause low oil pressure in an engine is:
A. 
Faulty oil pressure valve
B. 
C. 
D. 
22.
The top compression ring groove of piston is worn excessively and the gap is found to be larger than specifications. The technician would most likely:
A. 
Use a tapered ring set to repair this piston
B. 
Use oversized rings to repair this piston
C. 
Use a ring groove cleaner to repair the grooves
D. 
23.
A technician performs a battery capacity test on a vehicle that will not start. The test results in a reading of 9.1 volts at 70° F. Technician A says the battery has failed the capacity test. Technician B says battery voltage readings will increase as temperature decreases. Who is correct?
A. 
B. 
C. 
D. 
Neither Technician A or B
24.
A vacuum gauge is connected to the intake manifold of an engine. The needle fluctuates between (15 in. Hg and 20 in. Hg) at idle. This reading indicates:
A. 
A sticking valve or misfire.
B. 
Late ignition or valve timing.
C. 
D. 
A restricted exhaust system.