USPS Exam 2 – Complete Study Guide, Practice Questions & Answers
2026
7. In addition to vacuum, which of the following represents one means of opening an exhaust
gas recirculation(EGR) system valve?
A. Electricity
B. Hydraulic pressure
C. Manual linkage
D. Compression spring - ✔✔A
8. A technician is performing a four-gad analyzer test on a vehicle and finds a hydrocarbon (HC)
Reading. With the engine misfiring only at idle. What is the most likely the cause
A. Leaking intake manifold
B. Exhaust gas recirculation (egr) valve that does not fully close
C. Secondary ignition wire shorting
D. Partially clogged fuel injector - ✔✔B
9. When a transmission in the park position emits a high-pitched whine that increases with
engine revolutions per minute (RPM), what is the most likely cause?
A. A bad front pump
B a loose torque converter
C. Misadjusted park pawl
D. A worn sprag unit - ✔✔A
10. It is Not necessary to remove an automatic transmission to make which of the following
repairs.
A. Front pump seal
2026
7. In addition to vacuum, which of the following represents one means of opening an exhaust
gas recirculation(EGR) system valve?
A. Electricity
B. Hydraulic pressure
C. Manual linkage
D. Compression spring - ✔✔A
8. A technician is performing a four-gad analyzer test on a vehicle and finds a hydrocarbon (HC)
Reading. With the engine misfiring only at idle. What is the most likely the cause
A. Leaking intake manifold
B. Exhaust gas recirculation (egr) valve that does not fully close
C. Secondary ignition wire shorting
D. Partially clogged fuel injector - ✔✔B
9. When a transmission in the park position emits a high-pitched whine that increases with
engine revolutions per minute (RPM), what is the most likely cause?
A. A bad front pump
B a loose torque converter
C. Misadjusted park pawl
D. A worn sprag unit - ✔✔A
10. It is Not necessary to remove an automatic transmission to make which of the following
repairs.
A. Front pump seal
