Brakes
A customer complains that the brake warning light comes on whenever the brake pedal is pressed while driving. All of the following could cause this to occur EXCEPT:
A: leak in the rear half of the hydraulic system
B: Short to ground in the warning light circuit
C: Leaking pressure differential switch
D: Leak in the front half of the Hydraulic circuit.
B: Any leak in the hydraulic system that causes unequal pressure to be applied to one side of the pressure differential piston will cause the light to illuminate.
The only choice here is a short to the ground on the light. The failure would cause the light to stay on all the time regardless of hydraulic condition.
The technicians are discussing what they are going to have for lunch, and they decided on pizza. Technician A says that a veggie pizza is the most nutritious and we must get that. Technician B says that we are carnivores, and we must get a meat pizza who is correct.
A: Technician A
B: Technician B
C: Both A & B
D: Neither A of B
D:
Not everyone likes veggie or meat pizzas and let everyone order what they want.
On a vehicle, the Immobilizer will do all of following EXCEPT:
A: Stop operation of the starter motor
B: Verify the key code
C: Disable injectors if the keycode in invalid
D: Recognize the ECM ID number
A: the immobilizer cannot operate the starter
The operation of the Thermostatic switch depends on what?
A: Condenser,
B: Compressor,
C: Evaporator,
D: Outside Air?
B: Evaporator: the Thermostatic switch, which is used to cycle the A/C compressor on and off, depends on the temperature of the evaporator to operate
There is a growling noise at the A/C compressor when the system is off engine running. The noise stops when the system is turned on. Tech A says that a bad compressor bearing should be the cause. Tech B says a bad compressor clutch bearing it the cause. Who is Right.
A: Tech A
B: Tech B
C: Both
D: Neither
B:
Tech B only
Absorption of 3% moisture can reduce the boiling point of DOT 3 brake fluid by what percentage?
A: 10%
B: 20%
C: 25%
D: 50%
C: Absorption of 3% moisture can reduce the boiling point of DOT 3 brake fluid by 25%.
During the lunch in the previous questions the technicians are discussing how may store VIP has.
A technician states that VIP has stores in 5 states with over 100 stores and over a 1 thousand employees.
True or False?
False:
While VIP does have stores in 5 states, and we currently have 75 stores and about 750 employees.
The vehicle is misfiring on cylinder number 4. All of the following could be the issue EXCEPT:
A: An open circuit at pin 18 of the ECM.
B: An open circuit at pin 17 of the ECM.
C: An open circuit a pin 123 of the ECM.
D: A faulty ignition coil
B:
A faulty coil could cause the cylinder to misfire. PIN 123 pulses the injector for cylinder #4. Pin 18 triggers the coil for cylinder #4.
Pin 17 trigger the coil in cylinder #2 so it would cause a misfire in cylinder 4.
When filling a container with recycled refrigerant. What is the % of the containers gross weight should it be filled?
A: 50%
B: 60%
C: 70%
D:80%
B:
To prevent overfilling during transfer of the refrigerant, never fill a container to more than 60%.
The accelerator is disabled on the vehicle. Tech A says a broken connections at ECM terminal 141could be the cause. Tech B say that a broken connection a terminals 24& 25 will create this condition. Who is Correct.
A: Tech A
B: Tech B
C: Both A & B
D: Neither A or B
B:
Tech b as the vehicle is of a fly by wire design using the ECM controlled Throttle Actuator Control (TAC) motor. When this actuator is disabled, the spring-loaded throttle returns to its fast idle position of 15%. This will occur if the ECM loses both inputs from the throttle position sensors at pin 24 and 25.
A technician wants to check the condition of the vehicle's brake fluid. Where should he get the sample to make the most accurate determination?
A: Master cylinder
B: Brake caliper
C: Combination valve
D: Wheel cylinder
B: Brake caliper
Because the heat generated while stopping breaks down the corrosion inhibitors in the brake fluid.
Technicians are having a conversation about who makes the best battery-operated tools. Technician A says that Snap On makes the best tool and that's all he uses. Technician B says that Milwaukee makes a great tool at a better price and is comparable. Who is correct.
A: Technician A
B: Technician B
C: Both A & B
D: Neither A or B
B:
Technician B While Snap on tools are a very good but very pricey the Milwaukee tools are comparable and at t better price. Also, Technician B thinks Technicians A Prima Donna and an A?$#*&@.
Oxides of Nitrogen emissions are controlled by the catalytic converter and the:
A: PVC system
B: EFE system
C: EGR system
D: Secondary air system
C:
Oxides of Nitrogen emissions are reduced by the Catalytic converter and the EGR system.
To properly evacuate an A/C system, the vacuum should be operated a minimum of:
A: 5 minutes
B: 10 minutes
C: 20 minutes
D: 30 minutes
D:
30 minutes to ensure all moisture is removed and the system can maintain vacuum.
Technicain A says a short circuit to ground in a circuit will decrease resistance. Technician B says a short circuit will increase current flow. Who is Right?
A: Technician A
B: Technician B
C: Both A & B
D: Neither A or B
C:
both technicians are right. A short to ground has little or no resistance. Current flow increases as resistance decreases.
Brakes that drag or fail to release can be caused by which of the following conditions in the master cylinder?
A: leaking primary cup
B: Leaking secondary cup
C: failure of the residual pressure check valve
D: Clogged compensating port
D: A clogged or restricted compensating port will create a pressure build up, which will cause the brakes to drag or fail to release.
The technicians are talking about what VIP mission statement and what they can do to To Earn An Automotive Customer For Life. Technician A states that when a vehicle comes to VIP, we can do a complete MPI on the Vehicle and educate the customer. Technician B states shake down the vehicle and up sell the customer on work needed. Who is right.
A: Technician A
B: Technician B
C: Both A & B
D: Neither A & B
A:
Good quality inspections and educating the customer on condition of their vehicle is the correct answer.
A vehicle will not shift past second gear. The resistance of both shift solenoids is 6Ohms. Tech A says that the shift solenoids are defective. Tech B says there could be an open circuit to pin 308 of the TCM. Who is right?
A: Tech A
B: Tech B
C: Both A & B
D: Neither A or B
D:
Neither:
6 OHMS is correct for the solenoids. All the shift solenoids are on in second gear so therefore are functional. Tech A is incorrect. Tech B is incorrect because the connection to pin 308 engages the shift solenoids which are functional.
The high side pressure in an A/C system is above Spec. All of the following could cause this EXCEPT:
A: an overcharged
B: restricted air to the condenser,
C: slipping belt, a broken
D: compressor reed valve
Correct answer D:
A broken compressor reed valve could not cause the high-side pressure to be above spec.
The condition of a lead-acid battery is being checked. Technician A says use a galvanometer. Technician B says use a capacitive battery tester. Who is right?
A: Technician A
B: Technician B
C: Both A & B
D: Neither A or B
B:
A galvanometer is a analog type of tester. OEMs almost universally recommend the use of a non-intrusive conducive-capacitive type battery tester.
All of the following can cause a vehicle to pull to one side when the brakes are applied EXCEPT:
A: Sied caliper piston
B: Worn Strut rod bushing
C: Blocked master cylinder compensation port
D: Brake Fluid-soaked linings
C: A blocked master cylinder compensation port could cause all brakes to drag but would not cause a brake pull.
The technician is discussing how to troubleshoot a slow drain on the battery, which of these diagnostic tools should be used?
A: Ohmmeter
B: Ammeter
C: Voltmeter
D: Test light
B:
Always use an ammeter or a low amperage amp clamp with DMM to troubleshoot a slow drain in and electrical circuit.
The vehicle fails a loaded I/M test for excessive hydrocarbons. Which is following root of the problem.
A: Shorted CMP signal wire to the ECM
B: Open CKP sensor
C: Poor connection to ECM terminal 19
D: Blown fuse No.4
C:
Terminal 19 of the ECM is the ground driver for # 6 ignition coil. A poor connection here would cause excessive voltage to drop in the primary circuit resulting a partial misfire at best along with higher-than-normal hydrocarbons
When diagnosing an ATC system, most of the system temperature sensors can be tested for.
A: Resistance and current flow
B: Resistance and voltage drop
C: Voltage drop and current flow,
D: current flow and continuity
B:
Resistance and voltage drop: Most temp sensors can be tested for resistance and voltage drop. In general the sensor should be replaced if its resistance is not within spec.
An air bag system is being serviced. Technician A says to disconnect the yellow SRS connection at the front of the vehicle. Technician B says to disconnect and isolate the negative battery cable. Who is right?
A: Technician A
B: Technician B
C: Both A & B
D: Neither A or B
B:
Always disconnect the negative battery cable and wrap it with tape so contact cannot be made. Follow the vehicle's disarming instructions as some SRS systems can retain backup power for an additional period of time.