A.Increase oil con sumption B. comp ession tig ht seal intend C. wear/s ratch/ the cylinder D. All B. From inward to out war d C. from upward to dowr ward D. None 10.If engin oil is not replaced in the service limit /pe riod/ of th e man ufacturer: A. Red uce oil con's umption B Abnormal operati on C. prolong the enging life D. reduce exhaust gas 11. When assembling the engine if the piston ring is inst alled upsid e down 9. Whe n installing the cylinder heac cylinder head bolt is tightened w th the sequence of: C. Up Side of the engine D.down side of the engine A. From out ward to inward C. wind vane D. None 8.The notch /groove/ in the piston is faced /di rected to the? A. Rear of the engir le B. front of the engine 7. When checking the therm ostat the opening temp erature is measured by: D. Telesc opic gauge A. The rmometer B. Microm eter 6. Piston ring end gap is m easured by: A. Fleer gauge B. dial gauge C. plasti c gauge ongate the asser nble time B. tor eplace parts easily C. to identify easi y D. All 12. Dur ing condu cting com oression test afte unscrew the spar k plug why we crank the engine before measur ing amour t of compression result? A. To warm up the engine B.To present oil film between the cylinder a nd piston to sea compression C.To accelerate the engine D.T o remove soot res idual 13. The sum of piston diameter and installed clearance in the cylinde is called? D piston groo ve A.Piston oval B.Cylinder volume C.Bore diameter 14. The main pur pose of checking /bringing/injection pump in the inje ction pur np tester is: A. To ) test : delivery timing B.test delivery volume C.To test both delivery timing and volume D.Ato mization 15.Opening pressure of inje ection nozzle is tested : A. By altering the coil spring of the tester B.By tightening the screv v to max imum spec ification o ftl ne manual C. By replacing the screw with the shim D. By replacin g the shim 16. When inspec ting cooling system if water - leaks through inspection hole of wate pump,wl hat would you do? A.Rep lace water pump bearing B .Replace water pump seal kit C.Ber nt wate r pump shaft D.Replace water pump 18. With an inte ference angle the valve would be faced at an angl e that is : A/10 greater tha seat angle B/ 1^0 less than sea angle C/the san ne as seat angle D/none B/ to clean valves 17 .Lapping is used to: A/ Pre vent con pression leakage D/ All C/ to pre vent oil flc w to c mbustion chamber 19.If the valve is groun d down so much that the margin is low the valve will: D/run to loose A/ run to hot B Run to cool C/ Rur to high 20. __ is the gr adual wearing of valve seat B/v alve seat recession A/valve faces C /interfe rence angle D/ none