CSCC Auto Tech

The composite vehicle has an intermittent “Voltage Below Normal Cylinder 5” diagnostic trouble code. Which of these could be the cause? A: Loose wires at the injector B: Loose wires at connector BC pin 1 C: An open circuit at ECM pin 231 D: An open circuit at connector BH pin 2

A vehicle with an automatic transaxle and a properly tuned engine accelerates poorly from a stop. Acceleration is normal above 35 mph. Which of these could be the cause? A: A worn front pump B: A failed torque converter C: A worn planetary gear set D: A low fluid level

A vehicle with an automatic transaxle and a properly tuned engine accelerates poorly from a stop. Acceleration is normal above 35 mph. Which of these could be the cause? A: A worn front pump B: A failed torque converter C: A worn planetary gear set D: A low fluid level

An engine is using too much oil. Technician A says that worn valve guides could be the cause. Technician B says that tapered cylinder walls could be the cause. Who is right? A: A only B: B only C: Both A and B D: Neither A nor B

A fuel-injected engine has low fuel pressure at the fuel rail test port. This could be caused by a: A: restricted fuel filter B: restricted fuel injector C: stuck-closed fuel pressure regulator D: shorted fuel injector

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 feeler gauge. Who is right? A: A only B: B only C: Both A and B D: Neither A nor B

During operation, a transit bus has a puffing noise coming from the engine compartment. Which of these could be the cause? A: Faulty water pump B: Leaking exhaust manifold gasket C: Leaking air intake D: Faulty low-presure fuel regulator

Test Question Tuesday: Q: An engine is using too much oil. Technician A says that worn valve guides could be the cause. Technician B says that tapered cylinder walls could be the cause. Who is right? A: A only B: B Only C: Both A and B D: Neither A nor B

An engine overheats at higher rpms and returns to normal temperature at lower rpms. Which of these could be the cause? A: A stuck-on cooling fan relay B: A worn water pump belt tensioner C: A restricted heater core D: An incorrect coolant concentration

An engine makes a knocking noise with the transmission in DRIVE. The knocking noise is not heard in PARK or NEUTRAL. Which of these could be the cause? A: Excessive main bearing clearance B: Low oil pressure C: A cracked flexplate D: A broken piston ring