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
In general, the oil mist detectors include a built-in heating unit and a compact plug for electrical connectionThe function of heating unit is to （）
A
avoid false alarms as a result of condensing water vapor
B
avoid danger of frost under very cold weather
C
reduce the viscosity of the crankcase atmosphere in order to improve the fluidity
D
keep the temperature of the oil mist detectors in an appropriate range
参考答案
参考解析
解析：
暂无解析
更多 “单选题In general, the oil mist detectors include a built-in heating unit and a compact plug for electrical connectionThe function of heating unit is to （）A avoid false alarms as a result of condensing water vaporB avoid danger of frost under very cold weatherC reduce the viscosity of the crankcase atmosphere in order to improve the fluidityD keep the temperature of the oil mist detectors in an appropriate range” 相关考题
考题
______continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity(不透明性) measuring track.A.The oil mist detectorsB.The smoke detectorsC.An oily water monitorD.Oil discharge monitoring and controlling system
考题
To establish the evaluation index system of evaluation of students' all-round development must include__________ ．A.subject learning goals
B.general development goals
C.subject learning goals and general development goals
D.emotional goals
考题
With reference to the requirements under IMO MODU CODE，Operating manuals containing guidance for the safe operation of the MODU unit for both normal and envisaged emergency conditions， to the satisfaction of the Administration should be provided on board and be readily available to all concerned. The manuals should， in addition to providing the necessary general information about the unit， contain guidance on and procedures for the operations that are vital to the safety of personnel and the unit.The operating manual for normal operations should include the following general descriptive information（）A、a description and particulars of the unitB、a capacity plan showing the capacities and the vertical， longitudinal and transverse centers of gravity of tanks and bulk material stowage spacesC、Fuel oil storage and transfer proceduresD、All of above
考题
You need to recommend a solution for managing the address information of the user accounts. The solution must meet the company’s security requirements. What should you include in the recommendation？（）A、Active Directory delegationB、Authorization ManagerC、built-in security groupsD、user rights assignments
考题
单选题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
单选题When you are transferring fuel oil to the setting tanks, precautions to be observed should include （）A
plugging gooseneck tank vents to prevent accident overflowB
maintaining a high transfer rate until a slight trickle of oil is observed flowing from the overflow lineC
sounding the tanks frequently and reducing the transfer rate as the level approaches maximum fillD
maintaining a supply of chemical dispersant to cleanup minor oil spills adjacent to the ship
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Signaling devices which are required on inflatable liferafts include（）.A
a rocket shoulder rifleB
an oil lanternC
red flaresD
an air horn
考题
单选题In general, the oil mist defectors include a base plate with air blast pumpThe function of air blast pump is to （）crankcase.A
supply clean air to the measuring compartment of the units for more accuracyB
generaate the pressure required for the extraction of the oil mist from theC
generate the pressure required for the extraction of the oil mist from the crankcaseD
supply clean air to the measuring track of the units for more accuracy
考题
单选题To establish the evaluation index system of evaluation of students’ all-round development must include _____.A
subject learning goalsB
general development goalsC
subject learning goals general development goalsD
emotional goals
考题
单选题Which type and age of the ships has a higher potential for PSC inspection and a large percentage of subsequent PSC detentions?（）A
Bulk carriers and general cargo ships over 15 years oldB
Bulk carriers and oil tankers over 15 years oldC
Passenger liner and ro-ro ships over 10 years oldD
Container ships and general ships over 10 years old
考题
单选题Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.A
fuel oil vapor at the sludge tank ventB
unburned fuel vapors in the scavenge air receiverC
lube oil vapors in the crank caseD
lube oil vapors in the engine room
考题
单选题Regarding a Diesel engine crankcase, the general arrangement and installation should preclude the possibility of （）A
free entry of air to the crankcaseB
water entering the crankcase while engine wash-downs are being performedC
excessive oil leakage during periods of increased blow-byD
sub-cooling internal components
考题
单选题Oil mist detectors are usually used on board to detect oil mist density within （）.A
the engine crankcaseB
the engine scavenge boxesC
drain tanksD
fuel tanks
考题
单选题The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）A
excessive mist density in the crankcasesB
excessively high crankcase vacuumC
excessively high bearing temperatureD
excessive carbon buildup in the lube oil
考题
单选题The elements that determine a national foreign policy consist in ______.A
the various grades of oilB
the links between oil and foreign policyC
the benchmarks that are used to negotiate pricesD
the general availability and overall price of oil
考题
单选题The most common cause of lowering the crankcase lube oil flash point is （）.A
more water contentsB
contamination with fuel oilC
higher temperatureD
sufficient cooling of oil mist
考题
单选题Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.A
overspeed tripB
audible/visual alarmC
the ships/boats general alarmD
reserve oil storage tank
考题
单选题The oil mist detectors continuously（） the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity measuring track.A
detractB
extractC
pump upD
pump down
考题
单选题In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.A
oilB
sea waterC
airD
fresh water
考题
单选题For a general cargo ship, is not the necessary certificate/document that the PSCO will examine（）A
Survey Report FileB
Minimum Safe Manning documentC
Certificates of CompetencyD
International Oil Pollution Prevention
考题
单选题Shaker, circulation and spray are the three general methods used in（）A
pre-injection fuel oil treatmentB
lube oil filtrationC
lube oil purificationD
piston cooling
考题
单选题（）continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity measuring track.A
The oil mist detectorsB
The smoke detectorsC
An oily water monitorD
Oil discharge monitoring and controlling system
考题
单选题Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.A
cetane numberB
pour pointC
viscosity temperatureD
quality of the oil
热门标签
最新试卷
