Appendix 1 - Engine Repair - Sample Interprovincial Red Seal Examination Questions - Engine Repair

Sep 27, 2026

Uploaded by Đào

Appendix 1 provides sample interprovincial Red Seal examination questions focused on engine repair fundamentals. The questions cover UNF and metric fastener sizing, four-stroke cycle firing intervals, effects of bore and replacement pistons on displacement and compression, and diagnosing low oil pressure when pump replacement changes nothing. Additional items address engine stroke identification, interpreting cylinder leakage tester results, diesel compression testing methods, and typical engine oil pressure test conditions. Further questions involve locating oil leaks with fluorescent dye, cylinder head bolt removal order, preventing damage when removing rings and pistons, identifying cylinder wear patterns, wet compression checks, harmonic balancer removal, piston notch orientation, valve timing effects from belt stretch, and diagnosing low compression across adjacent cylinders.

LanguageEnglish

CategoryExam

FormatPDF

Pages5

Reading Time13 min

AccessFree to download

Engine Repair: Sample Interprovincial Red Seal Examination Questions

Fasteners and Engine Basics

Diagnostics and Measurement Methods

Cylinder Head, Pistons, and Rings

Valvetrain Timing and Performance Effects

A P P E N D I X 1 Engine Repair: Sample Interprovincial Red Seal Examination Questions 1. A grade 8 UNF capscrew has lines on the head. a. 2 b. 4 c. 6 d. 8 2. A metric bolt size of M8 means that a. The bolt is 8 mm long b. The bolt is 8 mm in diameter c. The pitch (the distance between the crest of the threads) is 8 mm d. The bolt is 8 cm long 3. On a metric bolt sized M8 􀀁 1.5, the 1.5 means that a. The bolt is 1.5 mm in diameter b. The bolt is 1.5 cm long c. The bolt has 1.5 mm between the crest of the threads d. The bolt has a strength grade of 1.5 4. Four-stroke cycle engines fire once crankshaft revolution/s. a. Every two b. Every four c. Every d. Every one-half 5. If the bore of an engine is increased without any other changes except for the change to oversize replacement pistons, the displacement will and the compression rate will a. Increase; increase b. Increase; decrease c. Decrease; increase d. Decrease; decrease 6. An engine has low oil pressure. Installing a new oil pump and the correct grade of oil made no difference. What is the most likely problem? a. Worn engine bearings b. Worn piston rings c. Loose valve clearance (lash) d. Plugged PCV system 7. The stroke of the engine is determined by the a. Connecting rod length b. Piston pin location in the piston c. Crankshaft d. Height of the piston head 8. Air, at a pressure of 830 kPa (120 psi), is fed into a spark plug opening with a cylinder leakage tester. Air is heard escaping from the oil fill opening in the camshaft cover. This could indicate a. A burned valve b. A leaking head gasket c. Broken piston rings d. Cracks in the cylinder head 9. Checking compression on a diesel engine is done a. At the spark plug opening b. With a crankcase pressure test c. At the glow plug opening d. With a cylinder balance test 10. Most oil pressure tests are done at idle speed and rpm. a. 500 b. 1250 c. 2500 d. 3500 APPENDIX I Engine Repair: Sample Interprovincial Red Seal Examination Questions 1225 11. Engine oil leaks are often located by adding fluorescent dye to the oil and checking with an/a a. Aerosol powder spray b. Shop trouble light c. Black light d. Visual inspection 12. When removing a cylinder head, which order should the bolts/nuts be loosened? a. From the front of the engine to the rear b. The lower (or outer) row first c. In the reverse order of assembly d. Start in the middle and work to both ends 13. Removing the ring ridge before removing the piston/rod assembly is done to prevent damage to the a. Piston ring lands b. Cylinder block c. Piston rings d. Piston skirt 14. In what area does most cylinder wall wear take place? a. In the centre of the cylinder b. Varies with engine loading c. Near the top of the cylinder d. At the bottom, due to connecting rod loading 15. Squirting oil into the cylinders (wet test) before checking the compression is done to test a. Piston rings b. Valve sealing c. Head gasket leakage d. The cylinder head for cracks 16. The crankshaft harmonic balancer should be removed by pulling on a. The outer ring b. The crankshaft snout c. The damper hub d. Both the ring and the hub at the same time 17. If a notch is found on the head of a piston, the notch usually faces the a. Rear of the engine b. Major thrust side c. Front of the engine d. Minor thrust side 18. Piston pin offset is used to a. Reduce piston skirt temperature b. Reduce piston slap c. Lower piston crown temperature d. Reduce piston pin clearance 19. The valve timing on a single overhead camshaft engine is retarded because of a stretched timing belt. How will this affect performance? a. High RPM power will be reduced b. No change in performance c. Low RPM power will be reduced d. Power will be reduced at all engine speeds 20. Low compression in two cylinders that are side by si

FAQs

How does increasing an engine’s bore using oversize replacement pistons affect displacement and compression ratio?

Increasing the bore increases displacement. The compression ratio also increases when only the bore is changed with oversize pistons.

If low oil pressure persists even after installing a new oil pump with the correct oil grade, what is the most likely problem?

The most likely issue is worn engine bearings.

What does air escaping from the camshaft cover oil fill opening during a cylinder leakage test at 830 kPa indicate?

It could indicate cracks in the cylinder head.

Sep 27, 2026

Uploaded by Đào