Automotive Technology: A Systems Approach - With Manual and Access
6th Edition
ISBN: 9781305513235
Author: ERJAVEC
Publisher: Cengage
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Textbook Question
Chapter 13, Problem 15RQ
True or False? Some crankshaft and camshaft timing sensors have a specified gap that must be set during installation.
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The Diesel Opacity (Smoke Meter) Emissions Inspection procedure requires that the Certified Inspector use an approved diesel opacity (smoke meter) tester to check emissions at the tailpipe and that the following must also be hooked up during the test:
1,RPM (tach) probe and oil temperature probe.
2. Oil temperature probe only.
3. RPM (tach) probe only.
4. Camshaft postion sensor.
Which of the following ensures proper timing of the intake and exhaust valve events?
The length of the tappets relative to the pushrods.
Proper pairing of the gear set joining the crankshaft to the camshaft.
The pulse timer mounted in series with the piston.
The installation of the flywheel key.
Technician A says that vacuum readings for an engine with a performance camshaft might be lower at
idle. Technician B says that an engine that has worn lower main bearing will have lower oil pressure at
freeway/highway speeds.
Who is correct?
Technician A only
Technician B only
Both A and B
O Neither A nor B
Chapter 13 Solutions
Automotive Technology: A Systems Approach - With Manual and Access
Ch. 13 - True or False? Make sure you locate and adhere to...Ch. 13 - How does a torque-to-yield bolt differ from...Ch. 13 - How do seals differ from gaskets?Ch. 13 - Where are thread sealers most often used?Ch. 13 - What are the major differences between aerobic and...Ch. 13 - Which of the following statements is incorrect?...Ch. 13 - True or False? Valve lash is adjusted in many...Ch. 13 - Which of the following statements about the...Ch. 13 - True or False? The computer in most late-model...Ch. 13 - Graphite is. an anaerobic substance an RTV an...
Ch. 13 - Which of the following are considered soft, cut...Ch. 13 - What material is typically not used to form a rear...Ch. 13 - Which of the following statements about preparing...Ch. 13 - On hybrid vehicles, how can you identify the high...Ch. 13 - True or False? Some crankshaft and camshaft timing...Ch. 13 - Prob. 1ASRQCh. 13 - Technician A uses adhesives to hold gaskets in...Ch. 13 - Technician A uses soft gaskets on valve covers....Ch. 13 - Technician A inspects all sealing surfaces for...Ch. 13 - Technician A says that oil pan gaskets are often...Ch. 13 - Prob. 6ASRQCh. 13 - While discussing proper engine break-in:...Ch. 13 - Prob. 8ASRQCh. 13 - Prob. 9ASRQCh. 13 - While selecting the proper RTV for a particular...
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- True or False? On some engines, if the gap between the crankshaft sensor and its trigger wheel is outside specifications, the sensor should be replaced.arrow_forwardWhile discussing camshafts Technician A says valve lift is based only on the height of the cam lobe. Technician B says valve duration is based on the height of the lobe. Who is correct? a. Technician A b. Technician B c. Both A and B d. Neither A nor Barrow_forwardTrue False? Camshaft straightness is checked using V-blocks and a feeler gauge?arrow_forward
- Type B engine misfires are excessive if the misfiring exceeds to percent in a rpm period.arrow_forwardWhile discussing valve body assemblies in late-model transmissions: Technician A says that the valve body is no longer needed in some electronically controlled transmissions. Technician B says that an EPC solenoid maintains constant fluid pressure through the valve body regardless of the vehicle’s operating condition. Who is correct?arrow_forwardWhat provisions are usually included on tractor engines to aid in the correct timing of the camshaft?arrow_forward
- True or False? Metering and proportioning valves balance the braking characteristics of disc and drum brakes.arrow_forwardWhile diagnosing the cause for an engine having good results from a compression test and cylinder leakage test but poor results from a cylinder power balance test: Technician A says that incorrect valve timing is the most likely cause. Technician B says that a severely worn cam lobe is a likely cause. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardExplain why a height-sensing proportioning valve is required on some vehicles.arrow_forward
- Technician A says that changes in engine load cause changes in hydraulic pressure inside the transmission. Technician B says that engine load is monitored by throttle pedal movement or by engine vacuum. Who is correct? a. Technician A only b. Technician B only c. Both A and B d. Neither A nor Barrow_forwardTechnician A says off-square springs may cause increased stem-to-guide wear. Technician B says excessive spring tension may cause premature camshaft wear. Who is correct? Technician A Technician B Both A and B Neither A nor Barrow_forwardWhich sensor is used for misfire monitoring on OBD II systems? Oxygen sensor Camshaft position sensor Crankshaft position sensor DPFE sensorarrow_forward
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