The scavenge port inspection should be carried out（）, to obtain the most reliable result with regard to the effectiveness and sufficiency of the cylinder lubrication and the combustion cycle (complete or incomplete)...

第1题

[单选题] In a two-stroke engine, there are always a series of openings known as （）, and in some circumstances, there are also openings known as （）, in the part of the cylinder liner.

A、scavenging air ports；exhaust ports B、inlet ports；scavenging air ports C、scavenging air ports；inlet ports D、exhaust ports；inlet ports

点击查看答案

第2题

[单选题] The principal difference between loop scavenging and crossflow scavenging, as used in single acting diesel engines, is the （）

A、direction of air flow within the cylinder B、sequence of port opening C、method of opening exhaust ports D、volume of air admitted to the cylinder

点击查看答案

第3题

[单选题] The process of loop scavenge is that the exhaust will be via ports （） the air ports and controlled by the same piston.

A、behind B、far from C、adjacent to D、in front of

点击查看答案

第4题

[单选题] The two-stroke cycle begins with the piston coming up from the BDC, with the scavenging ports in the sides of the cylinders being （）.

A、open B、uncover C、covered D、closed

点击查看答案

第5题

[单选题] It should be evident that the amount of fuel injected into the cylinder is dependent on the position of the helix relative to the （）.

A、inlet port B、exhaust port C、spill port D、scavenge port

点击查看答案

第6题

[单选题] Pressurized air enters the cylinder via the inlet ports and pushes the remaining exhaust gas from the cylinder in a process known as “（）”.

A、charging B、super charging C、scavenging D、exhausting

点击查看答案

第7题

[单选题] The ports are drilled in the liners at an angle of approx 20℃ the result being that （） is given a rotary movement.

A、the scavenging air B、the exhaust gases C、the mixed air D、the spray oil

点击查看答案

第8题

[单选题] The two-stroke cycle begins with the piston coming up from the bottom of its stroke, with scavenge ports in the sides of the cylinder being （）.

A、shut B、closing C、opened D、closed

点击查看答案

第9题

[单选题] Why are some diesel engine cylinder liners plated on the wearing surface with porous chromium?（）

A、The chromium will not wear out the piston rings B、The chromium strengthens the liners in the way of the scavenging air ports C、Chromium eliminates the need for oil scraper rings D、Pores in the plating aid in maintaining the lube oil film

点击查看答案

第10题

[单选题] The exhaust ports are located around the lower part of the cylinder liner, （）the products of combustion are driven by scavenging air.

A、in which B、by which C、through which D、from which

点击查看答案

The scavenge port inspection should be carried out（）, to obtain the most reliable result with regard to the effectiveness and sufficiency of the cylinder lubrication and the combustion cycle (complete or incomplete).

请使用微信扫码支付