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）
单选题
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
参考解析
解析：
暂无解析
更多 “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” 相关考题
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
The desirable properties of a marine fuel oil should include .A.high flash point and high viscosityB.low flash point and high viscosityC.low heating value and high sulphur contentD.high heating value and low sulphur content
考题
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
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
An oil tanker operating with dedicated clean ballast tanks shall be equipped with ______，approved by the Administration on the basis of specification recommended by the Organization，to enable supervision of the oil content in ballast water being discharged．A.An oil content meterB.An oil checkerC.An analyzer of oil contentD.A mixer of oily water
考题
Since lubricating oils and jet fuels are acutely water critical，it is necessary to effect full line draining and mopping up of any water in tanks before loading ______．A.purging with hydrocarbon gasB.gas-freeing operationsC.maintaining an inert conditionD.full line draining and mopping up of any water
考题
Which of the following computer types would benefit MOST from the installation of a water cooling setup?（）A、Gaming PCB、Home theater PCC、Thick clientD、Thin client
考题
You need to design a method to update the content on the Web server. Your solution must meet business and security requirements. What are two possible ways to achieve this goal？（）A、Use SSH to encrypt content as it is transferred to the Web server on the perimeter networkB、Install the Microsoft FrontPage Server Extensions， and use FrontPage to update contentC、Use Web Distributed Authoring and Versioning （WebDAV） over and SSL connection to the Web server to update contentD、Use FTP over an IPSec connection to transfer content to the Web serverE、Use Telnet to connect to the Web server， and then perform content changes directly on the server
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Which of the following pumps will most affect oily water separator performance and give the worst result?（）A
reciprocating pumpB
vane pumpC
screw pumpD
centrifugal pump
考题
单选题The author implies that topsoil is lacking in nutrients for which of the following reasons?I. The repeated planting of the same crops every yearII. The high acid content of slug trailsIII. The lingering after-effects of certain pesticidesA
I onlyB
II onlyC
I and III onlyD
I, II, and IllE
None of the above
考题
单选题Heavy fuel oils generally have an upper average ash content of 0~1% by weight.Which of the following conditions could be expected if the ash content increase above this amount?（）A
Glazing of the cylinder linersB
Increase valve wearC
Excessive oil pumpingD
Increase fuel consumption
考题
单选题Which of the following conditions is most likely to occur when unburned fuel contaminates the crankcase of a diesel engine?（）A
Lube oil is diluted and its viscosity is reducedB
Sulfuric acid is formedC
Bearings become pitted ad immediately failD
Valve stems develop sludge deposits
考题
单选题Which of the following steps should normally be taken first by those who have boarded a liferaft in an emergency situation?（）A
Ration food and water suppliesB
Search for survivorsC
Determine position and closest point of landD
Check pyrotechnic supplies
考题
单选题Which of the listed characteristics of lube oil are the most important to the engineer from an operational standpoint?（）A
Ash content, carbon residue, and gravityB
Viscosity, acidity, and demulsibilityC
Pour point, flash, point, and precipitation numberD
Auto-ignition point, viscosity index, and film strength
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 following computer types would benefit MOST from the installation of a water cooling setup?（）A
Gaming PCB
Home theater PCC
Thick clientD
Thin client
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Properties of a good refrigeration oil include（）A
low wax contentB
high pour pointC
high viscosityD
all of the above
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According to the passage, which of the following would be the most accurate description of the society envisioned by most Saint-Simonians?A
A society in which women were highly regarded for their extensive education.B
A society in which the two genders played complementary roles and had equal status.C
A society in which women did not enter public life.D
A social order in which a body of men and women would rule together on the basis of their spiritual power.
考题
单选题Which of the following pumps is most suitable for an oily water separator?（）A
reciprocating pumpB
vane pumpC
mono pumpD
axial-flow pump
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（） fuel oils （） lubricating oils require treatment before passing to the engine.A
Both；andB
Neither；norC
Either；orD
Both；or
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
热门标签
最新试卷