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【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

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更多“Black areas on the sealing surfaces of piston rings indicate（）”相关的问题
第1题
[单选题] Refer to the diagram. Which OSPF configuration command is required to configure Area 3 a s atotally stubby area?（）

A、On the ABR router ospf 10 area 3 stub  B、On all Area 3 routers router ospf 10 area 3 stub  C、On all Area 3 routers router ospf 10 area 3 stub no - summary  D、On the ABR router ospf 10 area 3 nssa  E、On the ABR rou ter ospf 10 area 3 stub no - summary  

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第2题
[多选题] To make OSPF area 4 totally stubby, the following command was issued on the ABR in router configuration mode: area 4 stub.Which two things need to be done to finish making area 4 a totally stubby area?（）

A、Apply the area 4 stub command to all routers in the area  B、On the ABR, use the area 4 stub command with the no - summary keyword  C、On the ABR, specify a default cost for the area with the area default - cost command  D、On the ABR, use the default - information originate command to inject a default route into area 4  E、Use the auto - cost command on each router in the area to automatically determine the cost to other OSPF areas  

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第3题
[单选题] When inspecting piston rings through the ports of a two-stroke/cycle diesel engine, black areas on the sealing surfaces are the result of （）

A、insufficient lubrication  B、improper piston cooling  C、blow-by  D、overload operation  

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第4题
[多选题] Which two are characteristics of link-state routing protocols?（） (Choose two.)

A、Routers choose a best path for a destination based on the SPF algorithm.  B、All routers in a given area or level build a consistent database describing the network's topology.  C、Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.  D、All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.  

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第5题
[单选题] Which of the precautions listed should be observed when taking on diesel fuel?（）

A、Secure all lighting to the main deck  B、Provide a portable fan to blow away fumes  C、Prohibit smoking in the area  D、Display a black triangle during daylight hours  

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第6题
[多选题] Refer to the exhibit. A network administrator wants to reduce the number of OSPF routes advertised from Area 1 into Area 2. As the router configuration specialist, what two things would you do to accomplish this goal?（）

A、Enter the configuration on router B1.  B、Enter the configuration on router B4.  C、On the same router, enter the Summary - address 10.10.1.0 255.255.255.128 subcommand.  D、On the same router, enter the Area 1 range 10.10.1.0 255.255.255.128 subcommand.  E、On the same ro uter, enter the Area 2 range 10.10.1.0 255.255.255.128 subcommand.  

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第7题
[多选题] Which three statements about OSPF areas are true?（）

A、Areas introduce a boundary on the link - state updates.  B、Areas are logical definitions specific to any given router.  C、All routers within an area have the exact link - state database.  D、The calculation of the Dijkstra algorithm on a router is limited to changes within an area.  E、The area designated router will always have a priority of 0.  

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第8题
[] Refer to the exhibit. What is the effect of the OSPF configuration on router B?（） Refer to the exhibit. What is the effect of the OSPF configuration on router B?（）

A、A. All interfaces will be in area 0  B、B. The router will be an ABR with s1/0 in area 0 and f0/0 and 0/1 in area 1  C、C. The route r will be an ABR with s1/0 in area 0 and f0/0 and 0/1 in area 2  D、D. The router will be an ABR with s1/0 in area 0, f0/0 in area 1, and f0/1 in area 2  

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第9题
[单选题] In the daytime，you see a large sailing vessel on the beam. You know that she is also propelled by machinery if she shows（）.

A、a basket  B、a black ball  C、a black cone  D、two black cones  

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