单选题Hydrocarbon vapors are usually detected by the use of the （）.Aflame safety lampBcombustible gas indicatorCgasometerDoxygen indicator
单选题
Hydrocarbon vapors are usually detected by the use of the （）.
A
flame safety lamp
B
combustible gas indicator
C
gasometer
D
oxygen indicator
参考解析
解析：
暂无解析
相关考题：
Usually you can use to pay for your tuition fees in a foreign university. () A. cashB. chequeC. bank cardD. account transfer
●In C program，all variables must be (70) before use，usually at the beginning of the function before any (71) statements.(70) A．statedB．writedC．illustratedD．declared(71) A．operateB．activeC．executableD．processing
A deficiency in characteristics that render the quality of the material/service unacceptable is usually referred to as:A defectiveB defectC non-conformanceD poor workmanshipE lack of fitness for use
163 A deficiency in characteristics that render the quality of the material/service unacceptable is usually referred to as:A. defectiveB. defectC. non-conformanceD. poor workmanshipE. lack of fitness for use
In C program, all variables must be(70)before use, usually at the beginning of the function before any(71)statements.A．statedB．writedC．illustratedD．declared
Primary memory is stored on chips located(66). In addition, computers usually use disks as second memory, for example,(67)disks located inside the computer.A．on the motherboardB．outsideC．inside the processorD．on the CPU
SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of (). A. J0 errors detected in a specified intervalB. errors detected in a given Errored Second (ES)C. errors detected in a given Severely Errored Second (SES)D. errors the encryption algorithm detects in a specified intervalE. Bit Interleaved Parity (BIP) errors detected in a specified interval
The use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．A.The pumproom is gas-freeB.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquidC.All other compartments in which flammable vapors and gases may exist are closed and securedD.All of the above
When a tank is to be gas freed after washing，the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with ______．A.the oxygenB.the gasC.the inert gasD.the hydrocarbon vapour
______is not one of the most important environmental factors that influence hydrocarbon biodegradation．A.temperatureB.concentration of nutrientsC.nitrogenD.oxygen
These attempts are usually resisted by powerful people who（ ）from the status quo（社会现状）,and it is often difficult for social movement participants to use the accepted and legal means of producing social change（such as the courts and political institutions）.A.acquireB.profitC.prohibitD.succeed
Refer to the exhibit. Which rule does the DHCP server use when there is an IP address conflict?（）A、The address is removed from the pool until the conflict is resolved.B、The address remains in the pool until the conflict is resolved.C、Only the IP detected by Gratuitous ARP is removed from the pool.D、Only the IP detected by Ping is removed from the pool.E、The IP will be shown, even after the conflict is resolved.
SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.A、J0 errors detected in a specified intervalB、errors detected in a given Errored Second (ES)C、errors detected in a given Severely Errored Second (SES)D、errors the encryption algorithm detects in a specified intervalE、Bit Interleaved Parity (BIP) errors detected in a specified interval
A technician is attempting to remove a number of viruses from an infected system. The antivirus software in use is fully updated and has detected the viruses. However, a message stating that the file is in use appears when the technician tries to quarantine or delete the infected files. Which of the following can be done to resolve this issue?（）A、Change the permissions on the file.B、End the running process.C、Run the antivirus scan again.D、Use the command line to delete the file.
单选题The atmosphere in a tank is too lean if it is（）.Aincapable of supporting combustion because the hydrocarbon content is below the LFL (Lower Flammable Limit)Bcapable of supporting combustion because the hydrocarbon content is above the UFL (Upper Flammable Limit)Ccapable of supporting a fire once startedDnot safe for ballasting
单选题The diameter of a piston is usually less at the crown than at the skirt, in order to （）.Afacilitate the installation of piston ringsBallow for the expansion of the piston during operationCprevent crankcase vapors from entering the combustion chamberDreduce wearing of the upper cylinder liner
单选题Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.Afuel oil vapor at the sludge tank ventBunburned fuel vapors in the scavenge air receiverClube oil vapors in the crank caseDlube oil vapors in the engine room
单选题The rated operating time of a self-contained breathing device may be reduced in actual use because of（）.Apressure differences in the atmosphereBthe length of the hose attached to the facepieceCthe physical exertion of the person wearing the deviceDspaces containing poisonous vapors
单选题A tank which has been sealed for a long period of time can be dangerous because （）.Asteel surfaces consume oxygen by rustingBsealed tanks usually form a vacuumCmoisture condenses in the tank, displacing the oxygenDmost tank coatings give off poisonous vapors in the presence of moisture
单选题Small floes of rough，hummocky sea ice capable of damaging a vessel（）.Acan usually be detected by radar in a smooth sea at a range of 4 to 6 kilometersBare indistinguishable from sea return on the PPICare invisible to radar when covered with a thick layer of snowDare usually seen at night before they are close enough to provide a radar echo
单选题A technician is attempting to remove a number of viruses from an infected system. The antivirus software in use is fully updated and has detected the viruses. However, a message stating that the file is in use appears when the technician tries to quarantine or delete the infected files. Which of the following can be done to resolve this issue?（）AChange the permissions on the file.BEnd the running process.CRun the antivirus scan again.DUse the command line to delete the file.
单选题SONET Code Violations (CVs) totals in the PM tables are actually an accumulation of the number of （）.AJ0 errors detected in a specified intervalBerrors detected in a given Errored Second (ES)Cerrors detected in a given Severely Errored Second (SES)Derrors the encryption algorithm detects in a specified intervalEBit Interleaved Parity (BIP) errors detected in a specified interval
单选题The use of the expression I won't bore you with all the detail..…includes that people usually observe the _________ maxim in their daily conversations.AQuantityBQualityCRelevanceDManner
单选题Hydrocarbon vapors are usually detected by the use of the （）.Aflame safety lampBcombustible gas indicatorCgasometerDoxygen indicator
单选题Which statement is TRUE concerning fuel vapors on a vessel（）.AFuel vapors gather in the lowest portions of the vesselBFuel vapors can only be ignited by an open flameCVent outlets should be located above the level of the carburetor air intakeDNone of the above
单选题SDH Code Violations （CVs） totals in the PM tables are actually an accumulation of the number of（）.A J0 errors detected in a in a specified intervalB errors detected in a given Errored Seconds （ES）C errors detected in a given Severely Errored Seconds （SES）D errors the encryption algorithm detects in a specified intervalE Bit Interleaved Parity （BIP） errors detected in a specified interval
单选题According to the passage, which of the following statements is TRUE?A"Lindow Man" was named after the person who first found him.BHistorians usually use paper evidence, while archaeologists use hard evidence.C"Lindow Man" was found by two archaeologists in the south of England.D”Lindow Man” was good at manual work.
单选题These reactions increase the probability of incomplete combustion and are more likely to（）uncombusted and photochemically active hydrocarbon compounds into the atmosphere.AleaseBreleaseCpleaseDrelief