Deck 6: In-Vehicle Engine Service

Question 1

A thermostat can fail in which way?

A) Stuck partially open
B) Stuck open
C) Stuck closed
D) Any of the above

Answer 1

D

Question 2

A skewed thermostat means it is ________.

A) contaminated with coolant
B) missing the thermo wax in the heat sensor
C) working, but not at the correct temperature
D) not working

Answer 2

C

Question 3

Coolant drained from the cooling system when replacing a thermostat or water pump should be ________.

A) reused
B) filtered and reinstalled after the repair
C) poured down a toilet
D) disposed of properly or recycled

Answer 3

D

Question 4

A water pump can fail provide the proper amount of coolant flow through the cooling system if what has happened?

A) The coolant is leaking from the weep hole
B) The impeller blades are worn or slipping on the shaft
C) A bearing failure has caused the shaft to become loose
D) The bearing is noisy

Question 5

Intake manifold gaskets on a V-type engine can fail due to what factor?

A) Coolant damage
B) Fretting
C) Relative movement between the intake manifold and the cylinder head
D) All of the above

Question 6

A defective thermostat can cause the powertrain control module (PCM) to set what diagnostic trouble code (DTC)?

A) P0171
B) P0300
C) P0172
D) P0128

Question 7

The engine is attached to the vehicle using ________.

A) engine blocks
B) motor mounts
C) engine cables
D) engine rods

Question 8

The torque specification for many plastic intake manifolds are in what unit?

A) Pound-feet
B) Lb-ft per second
C) Pound-inches
D) Ft-lbs per minute

Question 9

When replacing a timing belt, many experts and vehicle manufacturers recommend that what other part(s) should be replaced?

A) Water pump
B) Camshaft oil seal(s)
C) Tensioner assembly
D) All of the above

Question 10

Hybrid electric vehicles usually require special engine oil of what viscosity?

A) SAE 10W-30
B) SAE 5W-30
C) SAE 0W-20
D) SAE 5W-40

Question 11

Technician A uses a steel gasket scraper on aluminum engine parts. Technician B uses a plastic or wood scraper on aluminum engine parts. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B

Question 12

An intake manifold gasket has been replaced due to a vacuum leak. Which of the following steps uses a scan tool to complete the job?

A) Refilling the cooling system
B) Torquing the manifold bolts
C) Air cleaner check
D) Idle relearn

Question 13

A vehicle has set DTC P0172, indicating a lean exhaust and a vacuum leak is suspected. This can be diagnosed by introducing ________ around the intake manifold gasket.

A) sprayed gasoline
B) propane
C) rock salt
D) shop air

Question 14

On some engines equipped with a timing belt, the belt also may drive the ________.

A) power steering
B) alternator
C) AC compressor
D) water pump

Question 15

A hybrid electric vehicle has a feature that could allow the engine to start and run without warning. This feature is called ________.

A) battery save
B) self-start
C) idle stop
D) false off

Question 16

Some of the wiring under the hood of a late model vehicle is encased in bright orange covering. This indicates a ________.

A) high pressure air conditioning system
B) high voltage electrical system
C) high pressure hydraulic systems
D) None of these

Question 17

Technician A says to use lineman's gloves when servicing the high voltage system on hybrid electric vehicles. Technician B says that some hybrid vehicles require high-viscosity engine oil. Which technician is correct?

A) Technician A only
B) Technician B only
C) Both Technicians A and B
D) Neither Technician A nor B

Question 18

When changing a timing belt, it is recommended that the ________ also be replaced.

A) air intake hoses
B) air pump seal
C) front crankshaft seal
D) air filter

Question 19

Coolant leaking from an intake manifold can evaporate fast enough to leave no trace of a leak.

Question 20

A technician is preparing to do an oil change on a hybrid vehicle. What special precaution needs to be taken BEFORE performing this service?

A) Leave the hood closed when draining the oil
B) Do not lift the vehicle more than 12 inches off the floor
C) Make sure the ignition is "OFF" and the key is removed from the ignition switch
D) Disconnect any orange colored wiring harnesses

Question 21

What can be used to detect a vacuum leak at an intake manifold gasket?

A) Coolant
B) Dye
C) Propane
D) Spray water

Question 22

What is the proper tool used to measure valve clearances?

A) Dial gauge
B) Vernier caliper
C) Micrometer
D) Feeler gauge

Question 23

Before removing a timing belt what should the technician do?

A) Disconnect the speedometer cable
B) Align the timing marks
C) Remove the water pump
D) Lock the transmission in 1st gear

Question 24

When torquing intake manifold bolts, what is the proper sequence?

A) From the center to the outer ends
B) The sequence is not important
C) From both ends, then in towards the center
D) From one end to the other end