网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
The pour point of lubricating oils is affected the most by which of the following?
A.Extensive centrifuging
B.Wax content
C.Water content
D.Acid content
参考答案
更多 “ The pour point of lubricating oils is affected the most by which of the following?A.Extensive centrifugingB.Wax contentC.Water contentD.Acid content ” 相关考题
考题
Which of the following does Strayer want to stress most?A．The driving performance may be weakened by a cell phone talking．B．The driving performance may be affected by a high blood alcohol level．C．Drivers are not to drive over the cell phone or after drinking．D．A cell phone talking is no less hazardous than alcohol in driving．
考题
Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?A.ViscosityB.Sulfur contentC.Pour pointD.Cetane number
考题
Which of the following can be inferred from Paragraph 3 about Bauhaus?A．It was founded by Ludwig Mies van der Rohe.B．Its designing concept was affected by World War II.C．Most American architects used to be associated with it.D．It had a great influence upon American architectrue.
考题
A wireless access point supports up to 20 clients. Which of the following describes this wirelessnetwork?()
A. MeshB. Point to pointC. Point to multipointD. Ring
考题
A company finished upgrading the wireless encryption to WPA2 Enterprise. The administratorreceives a call from a user who is unable to connect to the company wireless.Which of the following is MOST likely causing the connection problem?（）A. The laptop is missing the software supplicantB. The access point SSID is hidden.C. The laptop only supports TKIP and AES encryption,D. The access point is on the wrong channel.
考题
An enterprise has plans to start adding IPv6 support. The initial deployment requires support from some IPv6 - only device s that need to access servers that support only IPv4.Which of the following tools would be most appropriate?（）A. Native IPv6B. Point - to -point tunnelsC. Multipoint tunnelsD. NAT - PT
考题
Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?A.Flash point improversB.Pour point improversC.InhibitorsD.Foam suppressors(抑制物)
考题
Which product is most likely to accumulate static electricity ________．A.Crude oilB.Hard asphaltC.Lubricating oilD.Residual fuel oil
考题
Which of the following network topologies BEST describes a VPN? （）(Select TWO)A、Point to PointB、Point to MultipointC、VLAND、RingE、Bus
考题
A wireless access point supports up to 20 clients. Which of the following describes this wirelessnetwork?（）A、MeshB、Point to pointC、Point to multipointD、Ring
考题
Which of the following does not affect security on a wireless access point?（）A、EncryptionB、DHCPC、PasswordD、SSID
考题
A technician needs a wireless access point to cover most of the office. Which of the following should the technician perform FIRST to achieve this? （）A、Change the radio channelB、Apply MAC address filterC、Determine placementD、Reduce radio power level
考题
A company finished upgrading the wireless encryption to WPA2 Enterprise. The administrator receives a call from a user who is unable to connect to the company wireless. Which of the following is MOST likely causing the connection problem?（）A、The laptop is missing the software supplicantB、The access point SSID is hidden.C、The laptop only supports TKIP and AES encryption,D、The access point is on the wrong channel.
考题
单选题Although lube oils used in the main lubricating service systems should have a relatively high flash point to avoid ignition, they can create smoke and fire hazards when they（）A
are exposed to a vacuumB
come in contact with extremely hot surfacesC
are reduced in temperature to just above the pour pointD
become extremely agitated or aerated
考题
单选题An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）A
have a high viscosity indexB
mix readily with refrigerantC
have a high freezing pointD
have a low pour point
考题
单选题Which of the following statements is correct concerning heat transfer?（）A
Heat is given off from a high temperature region known as a heat sinkB
Heat transfer rate is affected most by the size of the heat sink involvedC
Heat transfer rate is affected most by the temperature difference between the heat source and the heat sinkD
Heat transfer by radiation will occur only by mass motion of a fluid substance
考题
单选题Which of the following definitions can be used to define the term ‘offset ’ as a characteristic of controller action?（）A
The period of time in which the set point and the control point coincideB
The periodic change between the set point and the control pointC
The variable difference between the set point and the control pointD
The constant difference between the set point and the control point
考题
单选题A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）A
low TBN valueB
high alkaline reserveC
low flash pointD
high pour point
考题
单选题The pour point of lubricating oils is affected the most by which of the following?（）A
Extensive centrifugingB
Wax contentC
Water contentD
Acid content
考题
单选题If you change from a low pour point lubricant to a high pour point lubricant in a refrigeration system, （）.A
compressor lubrication will be improvedB
oil will not leave the crankcaseC
compressor valves will be damagedD
oil may congeal in the evaporator
考题
单选题Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）A
SplashB
GravityC
PressureD
Bypass
考题
单选题Which of the processes listed would be the most satisfactory method to use to lower the humidity of the air being circulated by an air conditioning system?（）A
Cooling the air to a temperature just above dew pointB
Heating the air to a point at which moisture will boil off ,then re-cooling itC
Cooling the air to a point below dew point, then reheating itD
Heating the air and then cooling it to a point below dew point
考题
单选题Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）A
Flash point improversB
Pour point improversC
InhibitorsD
Foam suppressors
考题
单选题Which of the listed conditions will affective pressure the most in the cylinder of a diesel engine?（）A
TBN of the lubricating oilB
Temperature of the lube oilC
Completeness in the mixing of the fuel and airD
Temperature of the cooling (sea) water
考题
单选题The term "pour point" is defined as the lowest temperature at which lubricating oils will flow （）.A
rapidlyB
by gravityC
through a standard orifice at a specified temperatureD
at a rate of 60cc per second
考题
单选题（） fuel oils （） lubricating oils require treatment before passing to the engine.A
Both；andB
Neither；norC
Either；orD
Both；or
热门标签
最新试卷