21.   Two technicians are discussing engine sealants and form in place gaskets. Technician A says sealants such as RTV are aerobic. Technician B says some sensors may be damaged if an unapproved sealant is used.
Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

26.   An engine suffers from detonation. Technician A this may be caused from a defective EGR valve. Technician B says advanced ignition timing can cause this condition. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

22.   Technician A says the engines main caps should be replaced in the same order they are removed. Technician B says a worn thin thrust bearing will result in excessive crankshaft end-play. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

27.   A technician is checking for piston ring groove clearance. The proper technique includes.

A. The old ring and a feeler gauge

B. The new ring and a feeler gauge

C. Only a feeler gauge

D. No feeler gauge is required

23.   A compression test is being performed on a vehicle. The #1 cylinder is 30lbs. lower than the rest. 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 this test indicates one of the cylinders valves may be defective. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

28.   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. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

24.   Technician A says that connecting rods and the rod caps are matched and can not be mixed. Technician B says it may be necessary to mark these parts for reassembly. Who is correct?

A. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

29.   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. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

25.   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. Technician A

B. Technician B

C. Both Technician A and B

D. Neither Technician A or B

30.   A strong sulfur smell is coming from the tailpipe of a vehicle. The most-likely cause of this condition is:

A. A lean fuel condition

B. Leaking head gasket

C. Worn piston rings

D. A rich fuel condition