柴油机4(国外英文资料).docVIP

柴油机4(国外英文资料) B 301. high-power medium speed diesel engine piston cooling method is used. Type II sleeving type II - injection type III - oscillating cooling type IV - chamber cooling type V. Coil cooling type VI hinge type A. I + II + III + V B. II + III + IV + V C. II + III + + IV + VI D. III + IV + + V + VI A 302., in order to ensure that the piston seal ring in the ring groove in the reasonable assembly gap, the piston ring can be manually trimmed parts have (). 1. Ring surface of the inner circle (ring back) II. End ring (plane). The lower end of the ring III (plane). The ring IV lap (notch). V outside circle ring (face) vi. Any part of the ring A. I + II + IV B. II + III + V C. III + IV + VI D. III + V + VI The magnitude of the gas force in the B 303. piston ring during the operation is (). I ring. The upper and lower plane as II. Plane ring than plane. The plane ring III than under plane IV. Outside the radial inner ring as large as v. Ring radial inner surface than the outer surface. VI small surface than the outer surface of the radial inner ring A. I + III + V B. II + V C. I + II + IV + VI D. I + III + V + VI The movement of the first piston ring in the ring groove of the C 304. diesel engine has. Axial motion II. Axial vibration III. Scraping movement. IV. rotational motion v. Torsional vibration vi. Radial vibration A. I + III + V B. II + III + V + VI C. I + II + IV + V + VI D. I + II + III + IV + V + VI The piston of C 305. large low-speed two stroke diesel engine has the following characteristics. 1. The piston head and a piston skirt part II combined structure manufacturing. The piston skirt with compression ring and ring with flexible bolt connection. III IV piston head and piston skirt and the piston rod. The piston head adopts thin-walled strong back structure. The piston V are cooling type and adopt sleeve mechanism vi. With a long skirt controlled port A. I + III + V B. II + III + V C. I + III + IV D. III + V + VI C 306. usually, the cylinder pist