海船船员考试

单选题Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）A Ball floatB ThermostaticC BimetallicD Impulse

题目
单选题
Which of the listed types steam traps operates on the principle that hot water flashes to steam when its vapor pressure is rapidly reduced?（）
A

Ball float

B

Thermostatic

C

Bimetallic

D

Impulse

参考答案和解析
正确答案： C
解析： 暂无解析
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相似问题和答案

第1题：

Referring to the exhibit, what is the purpose of the targets section of the configuration?()

A. It defines which devices will be sending traps.

B. It specifies where to send traps.

C. It defines the IP addresses of management systems that can access the device.

D. It specifies which devices can be polled for SNMP data.


参考答案：B

第2题：

Which of the following network devices operates on Layer 1 of the OSI model？（）

  • A、Hub
  • B、Switch
  • C、Router
  • D、Bridge

正确答案:A

第3题：

Which of the units listed is used to combust waste in the engine room?

A.Boiler

B.Incinerator

C.Generator


正确答案：B

第4题：

单选题
Which statement is true about loop guard？（）
A

Loop guard only operates on interfaces that are considered point-to-point by the spanning tree.

B

Loop guard only operates on root ports.

C

Loop guard only operates on designated ports.

D

Loop guard only operates on edge ports.


正确答案： C
解析： 暂无解析

第5题：

单选题
When lighting off an auxiliary boiler, which of the problems listed could cause the burners to sputter?（）
A

cold fuel oil

B

low fuel oil pressure

C

low atomizing steam pressure

D

water in the fuel oil


正确答案： C
解析： 暂无解析

第6题：

Which two statements correctly describe a Cisco WLC configuration of Wireless > QoS > Profiles >Wired_QoS_Profiles for an implementation of DSCP or CoS deployment?（）

  • A、It must always be set on all QoS profile types because this sets the type of markings as either CoS or DSCP.
  • B、It is optional if the Cisco WLC attached switch operates on a trust DSCP model.
  • C、It must be set if the Cisco WLC attached switch operates on a trust CoS model.
  • D、It sets the EDCF queue used for the radio-transmitted frames.

正确答案:B,C

第7题：

Which of the protocols below, operates at Layer 2 of the OSI model, and is used to maintain a loop-free network?（）

  • A、RIP
  • B、STP
  • C、IGRP
  • D、CDP
  • E、VTP

正确答案:B

第8题：

Personnel who are moving or handling material aboard ship should NOT follow which of the listed practices?

A.Signaling that all personnel are clear before lifting or lowering material

B.Examining material for sharp edges or protruding points before handling

C.Closing, tagging or securing valves that permit entrance of steam, water, or air into a fitting or other equipment

D.Throwing materials from high places to the deck


正确答案：D

第9题：

单选题
Which of the turbo-charging systems listed operates with the least average back pressure in the exhaust manifold?（）
A

Constant volume

B

Constant pressure

C

Pulse pressure

D

Radial flow


正确答案： D
解析： 暂无解析

第10题：

单选题
Which of the listed bearing types is an example of a solid bearing?（）
A

Piston wrist pin bushing

B

turbine bearing

C

Spring bearing

D

Diesel engine main bearing


正确答案： A
解析： 暂无解析

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