The sealing rings are in four parts and pressed together around the piston rods by means of （）.

A、nuts

B、bolts

C、coil springs

D、stuffing boxes

查看正确答案

更多“The sealing rings are in four parts and pressed together around the piston rods by means of （）.”相关的问题

第1题

[单选题] The lowest ring of a piston is （）.

A、a coil spring B、a sealing ring C、an oil distributor ring D、main seal ring

点击查看答案

第2题

[单选题] In a diesel engine, blow-by is a result of combustion gases leaking into the crankcase past the （）

A、wrist pin bushings B、compression rings C、cylinder liner seals D、cylinder liner sealing ring

点击查看答案

第3题

[单选题] Black areas on the sealing surfaces of piston rings indicate（）

A、lube oil pumping B、rotating rings C、gas pressure behind the ring D、passage of hot gases

点击查看答案

第4题

[] In an internal combustion engine, which of the devices listed will force the compression rings to seal the compression gases in the space above the piston?（）

A、A.Used of bimetallic piston rings B、B.Ring gap pre-tensioning C、C.Thermal increase in ring-end clearance D、D.Gas pressure acting against the back of the ring

点击查看答案

第5题

[单选题] Diesel engine blow-by is the leakage of combustion gases past the （）

A、oil rings only B、compression and scraper rings C、cylinder liner sealings D、cylinder liner ring grooves

点击查看答案

第6题

[单选题] The sealing function of the piston ring is brought about by the gas pressure above and behind the piston ring, which forces it （） against the bottom of the ring groove, and （） against the cylinder wall.

A、upwards；inwards B、upwards；outwards C、downwards；inwards D、downwards；outwards

点击查看答案

第7题

[单选题] The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.

A、an oil seal B、removing heat C、a gas seal D、cooling the piston

点击查看答案

第8题

[单选题] Ring groove inserts are occasionally used on aluminum alloy piston to（）

A、reduce the ring groove wear rate B、seal against crankcase vapors C、lessen the wear on aluminum part of the cylinder D、allow for the greater expansion rate of aluminum

点击查看答案

第9题

[单选题] Which of the following are components of a mechanical seal? （） (1) stationary ring (2) rotational ring (3) packing (4)spring

A、(1), (2) and (3) B、(1), (2) and (4) C、(2), (3) and (4) D、None of the above

点击查看答案

第10题

[] If the capacity of a centrifugal pump decreases gradually over a long period of time, you should replace the （）.

A、A.packing gland B、B.mechanical seals C、C.lantern rings D、D.wearing rings

点击查看答案

账号：登录