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Question 1. Which law explains how pressure applied to ATF in a hydraulic circuit is transmitted equally in all directions? A) Bernoulli’s Law B) Pascal’s Law C) Boyle’s Law D) Charles’s Law Answer: B Explanation: Pascal’s Law states that pressure applied to a confined fluid is transmitted undiminished throughout the fluid, which is the basis for hydraulic operation in automatic transmissions. Question 2. What primary function does ATF serve besides lubrication? A) Fuel injection B) Electrical grounding C) Power transfer and cooling D) Exhaust gas recirculation Answer: C Explanation: ATF transfers hydraulic power, cools components, and cleans internal surfaces while providing lubrication. Question 3. When lifting a vehicle for transmission removal, which point should be avoided? A) Manufacturer‑specified jack points on the frame rails B) The transmission oil pan mounting holes C) The center of the front axle D) The rear suspension crossmember Answer: B
Explanation: The oil pan mounting holes are not designed to support vehicle weight and can deform or break under load. Question 4. Which PPE item protects against ATF splashes during a fluid change? A) Steel‑toe boots B) Heat‑resisting gloves C) Safety glasses D) Ear plugs Answer: C Explanation: Safety glasses shield the eyes from hazardous ATF splatter. Question 5. A milky‑white ATF appearance most likely indicates: A) Overheating of the fluid B) Air entrainment from a loose fill plug C) Coolant contamination D) Oxidation varnish Answer: C Explanation: Coolant mixing with ATF creates an emulsion that appears milky, signaling a coolant leak into the transmission. Question 6. During a stall test, a low torque converter stall speed suggests a problem with: A) The pump gear teeth B) The torque converter stator C) The transmission case vent D) The output shaft bearing
Answer: C Explanation: The TCC solenoid directly regulates hydraulic pressure to lock or unlock the torque converter clutch. Question 10. When checking ATF level on a non‑dipstick vehicle, the correct method is: A) Use the “check‑fluid” port on the transmission case B) Rely on the dipstick in the engine bay C) Measure the weight of the fluid in the pan D) Estimate based on mileage Answer: A Explanation: Vehicles without a dipstick provide a dedicated check‑fluid port for accurate ATF level verification. Question 11. Which of the following is a sign of excessive ATF oxidation? A) Bright red fluid color B) Presence of varnish on pump surfaces C) Low viscosity measured with a viscometer D) Increased fuel economy Answer: B Explanation: Oxidation creates varnish deposits on internal components like the pump. Question 12. In a hydraulic control system, what purpose does an accumulator serve? A) Store mechanical energy in a spring B) Regulate fluid temperature C) Provide a reserve of pressurized fluid for rapid actuation
D) Filter contaminants from ATF Answer: C Explanation: Accumulators hold pressurized fluid to quickly supply pressure spikes needed for clutch engagement. Question 13. Which sensor provides the TCM with information about engine load? A) Vehicle speed sensor (VSS) B) Manifold absolute pressure (MAP) sensor C) Crankshaft position sensor D) Oxygen sensor Answer: B Explanation: MAP sensor data reflects engine load, influencing shift timing and line pressure. Question 14. A faulty neutral safety switch typically results in: A) Inability to start the engine in neutral or park B) Over‑revving during downshifts C) Excessive transmission fluid leakage D) Loss of power steering assist Answer: A Explanation: The neutral safety switch prevents engine start unless the transmission is in neutral or park. Question 15. Which component is inspected for proper end play during torque converter overhaul? A) Flex plate bolts B) Pilot bearing C) Converter pump drive surface
D) Provide a pressure reserve for the TCC Answer: B Explanation: The cooler dissipates heat absorbed by ATF during operation, maintaining optimal fluid temperature. Question 19. When performing a valve body inspection, you notice a worn check ball seat. The likely symptom is: A) Delayed upshifts B) Harsh downshifts C) Low line pressure at all speeds D) Transmission fluid leaks from the case Answer: A Explanation: A worn check ball seat can cause insufficient pressure build‑up, leading to delayed upshifts. Question 20. Which type of one‑way clutch uses a sprag mechanism? A) Roller‑type clutch B ** (Note: This is a typo; correct answer should be C)** C) Sprag clutch D) Planetary clutch Answer: C Explanation: Sprag clutches employ a tapered, asymmetrical tooth that allows rotation in one direction only. Question 21. A “burnt” ATF odor most commonly indicates: A) Low fluid level B) Over‑heating due to insufficient cooling
C) Air entrainment in the fluid D) Incorrect viscosity fluid Answer: B Explanation: Overheating degrades ATF, producing a burnt smell. Question 22. The function of a throttle valve (TV) linkage in an automatic transmission is to: A) Adjust shift timing based on engine load B) Control the hydraulic pressure to the front pump C) Operate the transmission’s internal cooling fan D) Activate the neutral safety switch Answer: A Explanation: TV linkage translates throttle position into hydraulic pressure adjustments for shift quality. Question 23. Which of the following is a correct step when disposing of used ATF? A) Dump it in a municipal landfill pit B) Mix with household cleaning solvents for dilution C) Transfer to a sealed container and take to a licensed recycler D) Burn it in an open fire Answer: C Explanation: Proper disposal requires sealed containment and delivery to an EPA‑approved recycling facility. Question 24. During a road test, a vehicle exhibits a “hard shift” from 2nd to 3rd gear at 45 mph. The most likely cause is: A) Faulty VSS signal
A) Sun gear B) Ring gear C) Carrier D) Output shaft Answer: B Explanation: During a 1‑to‑2 upshift, the ring gear is often held stationary while the sun and carrier rotate to achieve the new gear ratio. Question 28. Which diagnostic symptom would most likely indicate a failed pressure control solenoid (EPC)? A) Erratic shift timing across all gears B) No torque converter lock‑up at cruising speed C) No transmission fluid pressure at idle D) Transmission fluid leaks from the case gasket Answer: B Explanation: The EPC modulates line pressure; a failure can prevent the TCC from engaging, eliminating lock‑up. Question 29. What is the recommended torque specification for the flex plate bolts on most rear‑wheel‑drive automatic transmissions? A) 15‑ 20 lb‑ft B) 30‑ 35 lb‑ft C) 45‑ 55 lb‑ft D) 70‑ 80 lb‑ft Answer: C Explanation: Flex plate bolts typically require a higher torque (45‑ 55 lb‑ft) to maintain proper clamping force.
Question 30. Which of the following ATF characteristics is most critical for proper clutch pack operation? A) High flash point B) Viscosity at operating temperature C) Color stability D) Boiling point Answer: B Explanation: Viscosity determines hydraulic pressure generation and clutch pack actuation timing. Question 31. A CVT uses a steel belt instead of a chain primarily because: A) Belts are cheaper to produce B) Belts can handle higher torque loads with less slippage C) Belts are lighter than chains D) Belts require no lubrication Answer: B Explanation: Steel belts provide high tensile strength and low friction, essential for transmitting torque in CVTs. Question 32. During a hybrid vehicle transmission service, the high‑voltage battery must be: A) Disconnected and isolated before any work begins B) Fully charged to maximum voltage C) Covered with a plastic sheet only D) Left connected to maintain system diagnostics Answer: A
Explanation: Kick‑down increases hydraulic pressure, allowing the transmission to downshift for higher engine RPM during acceleration. Question 36. In a pressure test, a line pressure of 250 psi at 2000 rpm is considered: A) Too low – pump may be worn B) Normal for most heavy‑duty transmissions C) Too high – possible valve body restriction D) Indicative of ATF over‑dilution Answer: B Explanation: High‑performance transmissions often target 240‑ 280 psi at highway speeds. Question 37. Which of the following cleaning agents is recommended for removing carbon deposits from valve body bores? A) Straight gasoline B) Mineral spirits C) Chlorinated solvent D) Sodium hydroxide solution Answer: B Explanation: Mineral spirits effectively dissolve carbon without damaging aluminum surfaces. Question 38. A transmission that exhibits “slipping” under load most likely has: A) A clogged transmission filter B) Worn clutch pack friction material C) Incorrectly adjusted shift linkage D) Low battery voltage to the TCM
Answer: B Explanation: Worn friction material reduces clutch holding capacity, causing slip under load. Question 39. Which sensor provides the TCM with information about the engine’s rotational speed? A) Vehicle speed sensor (VSS) B) Crankshaft position sensor (CKP) C) Throttle position sensor (TPS) D) Transmission fluid temperature sensor (TFT) Answer: B Explanation: The CKP sensor measures engine RPM, a key input for shift logic. Question 40. When reinstalling a torque converter, the correct clearance between the converter pump drive surface and the pump gear is typically: A) 0.001‑0.003 in B) 0.006‑0.009 in C) 0.010‑0.015 in D) 0.020‑0.025 in Answer: B Explanation: Proper end play (0.006‑0.009 in) ensures adequate pump engagement without excessive wear. Question 41. A faulty output speed sensor will most likely cause which TCM response? A) Inability to shift into reverse B) Erratic or limp‑mode shifting C) Over‑cooling of ATF
B) Faulty pressure control solenoid C) Low ATF level D) Defective neutral safety switch Answer: A Explanation: A stiff or misadjusted shift cable adds mechanical resistance, making the clutch feel hard. Question 45. A transmission that exhibits “late upshifts” at high load is often caused by: A) Low MAP sensor voltage B) Excessive line pressure due to a stuck EPC solenoid C) Faulty TCC solenoid preventing lock‑up D) Incorrect ATF viscosity causing delayed pressure build‑up Answer: D Explanation: Improper ATF viscosity slows pressure development, delaying upshift timing under load. Question 46. Which of the following is a primary function of the transmission’s “pump drive gear”? A) To regulate ATF temperature B) To convert engine torque into hydraulic pressure C) To open the transmission case for fluid flow D) To engage the torque converter clutch Answer: B Explanation: The pump drive gear transfers mechanical energy from the engine to the pump, creating hydraulic pressure. Question 47. When inspecting a valve body, a “pitted” check ball seat typically results from: A) Excessive ATF temperature
B) Abrasive particles in the fluid C) Incorrect torque on the valve body bolts D) Over‑filling the transmission with fluid Answer: B Explanation: Contaminants act as abrasives, causing pitting on precision surfaces like check ball seats. Question 48. The main advantage of using a “line pressure regulator” solenoid in an automatic transmission is: A) To increase the ATF’s flash point B) To maintain consistent pressure across varying engine loads C) To provide a backup cooling circuit D) To control the vehicle’s idle speed Answer: B Explanation: The regulator solenoid adjusts line pressure to match engine load, ensuring smooth shifts. Question 49. Which of the following is the correct order of steps when performing a “stall test” on a rear‑wheel‑drive automatic? A) Engage parking brake → Select Drive → Apply full throttle → Observe RPM rise B) Disable ignition → Shift to Neutral → Apply throttle → Measure stall speed C) Secure vehicle → Set transmission to Drive → Apply full throttle while holding brakes → Note maximum RPM D) Place vehicle on a lift → Remove transmission pan → Spin pump manually → Record pressure Answer: C Explanation: The vehicle must be restrained, transmission in Drive, and full throttle applied while brakes hold the car to measure stall speed.
Question 53. Which component is responsible for preventing ATF from entering the engine’s cooling system? A) Transmission oil cooler bypass valve B) ATF‑to‑coolant heat exchanger seal C) Internal pump seal D) Front pump’s internal bypass valve Answer: B Explanation: The heat exchanger seal isolates ATF from coolant; failure leads to milky fluid. Question 54. A transmission that exhibits “pop‑off” when shifting from 3rd to 4th gear is likely suffering from: A) Incorrectly adjusted shift linkage causing delayed clutch engagement B) Low ATF level causing insufficient hydraulic pressure C) Faulty 4‑ 4 ‑1 shift solenoid stuck open D) Over‑tightened transmission mount Answer: C Explanation: A stuck‑open shift solenoid can cause abrupt pressure release, resulting in a pop‑off sensation. Question 55. Which of the following is NOT a typical symptom of a failed torque converter clutch (TCC) solenoid? A) Engine RPMs remain high at cruising speed B) Reduced fuel economy C) Transmission fluid foaming D) No lock‑up even when throttle is steady
Answer: C Explanation: Foaming is unrelated to TCC solenoid operation; it is usually caused by aeration or contamination. Question 56. During a transmission rebuild, the correct torque for a planetary gearset sun gear bolt is typically: A) 35‑ 40 lb‑ft B) 55‑ 60 lb‑ft C) 75‑ 80 lb‑ft D) 95‑ 100 lb‑ft Answer: C Explanation: Sun gear bolts often require high torque (75‑ 80 lb‑ft) to secure the gear set under load. Question 57. In a hybrid electric vehicle, the transmission’s regenerative braking function is primarily controlled by: A) The TCC solenoid B) The hybrid control module (HCM) C) The neutral safety switch D) The transmission oil cooler valve Answer: B Explanation: The HCM manages regenerative torque flow between the electric motor and transmission. Question 58. Which of the following is a common cause of “ATF foaming” after a fluid change? A) Over‑filling the pan beyond the fill line B) Using a low‑viscosity ATF in a high‑viscosity application C) Introducing air through a loose fill plug or vent hose
