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）
Before welding can be done in a tank that has previously carried petroleum products，a certificate must be obtained from ________ ．
A.the customs
B.the Register Bureau of shipping
C.the shipyard fire department
D.a certified gas chemist
参考答案
更多 “ Before welding can be done in a tank that has previously carried petroleum products，a certificate must be obtained from ________ ．A.the customsB.the Register Bureau of shippingC.the shipyard fire departmentD.a certified gas chemist ” 相关考题
考题
Never before in China ________ for the farmers.
A.has so much been doneB.have so much been doneC.has been done so muchD.so much have been done
考题
Within the team, a work plan can tell each member what()and why.A. is being doneB. has doneC. has been done
考题
A small child has to learn to keep its ( ) before he can walk far.A. borderB. blockC. baggageD. balance
考题
Before petroleum______, another way has to be found.A、takes outB、runs outC、makes outD、works out
考题
Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an ____.A.Orsat apparatusB.flame safety lampC.Halide torchD.combustible gas indicator
考题
Before welding can be done in a tank that has carried petroleum products，a certificate must be obtained from ______.A.the customsB.the Register Bureau of shippingC.the shipyard fire departmentD.a certified gas chemist
考题
Before welding in a tank that has carried petroleum products，the tank must be certified by ______.A.the Coast GuardB.the ABSC.the shipyard fire departmentD.a certified marine chemist
考题
Which statement about entering into a tank which has been sealed for a long time is TRUE ________．A.The tank should be tested only once to ensure the oxygen content is at least 14% before entryB.The tank must be tested at frequent intervals to ensure that hazardous gasses have not regeneratedC.The tank need not be tested for oxygen content if it is ventilated for more than 24 hoursD.If the oxygen content tests at less than 12% you should wear an approved gas mask
考题
What refers to the depth of a petroleum product in a tank ________．A.InnageB.OutageC.ThievageD.Ullage
考题
When a non-volatile cargo is carried in a tank that has not been previously gas freed，then that tank shall ______．A.be purged with hydrocarbon gas prior to loadingB.be gas-freed after loading operationsC.not be maintained in an inert conditionD.be maintained in an inert condition
考题
单选题Petroleum cargo tanks should not be topped off at deck level when loading on a cold day because（）.A
a subsequent temperature rise will cause the cargo to overflowB
air pockets may cause the cargo to bubble out of the ullage holeC
the increased viscosity of the product requires higher loading pressure which increases the chances of a spillD
the tank valve may be stiff and a spill will occur before the valve can be closed
考题
单选题The designations A，B，C，D and E grades of cargo refer to the（）.A
degrees of quality of petroleum productsB
flash point range and Reid vapor pressure index of petroleum productsC
grades of crude oilD
pour point，color，and viscosity index of petroleum products
考题
单选题He has never done this type of work before; I am not sure how he will fit（）with it.A
inB
onC
intoD
up
考题
单选题Which of the petroleum products listed has the lowest flash point?（）A
Hydraulic oilB
Lubricating oilC
Diesel oilD
Refrigeration oil
考题
单选题Before starting a diesel engine that has an engine driven lube oil pump, the engineer should （）.A
open the bypass lineB
cut in the lube oil coolerC
pressurize the lube oil systemD
top off the expansion tank
考题
单选题Before welding is permitted on a fuel tank, it must be certified or declared （）A
safe for becoming roundedB
safe for hot workC
not safe for personnelD
not safe for hot work
考题
单选题A tank which has been sealed for a long period of time can be dangerous because （）.A
steel surfaces consume oxygen by rustingB
sealed tanks usually form a vacuumC
moisture condenses in the tank, displacing the oxygenD
most tank coatings give off poisonous vapors in the presence of moisture
考题
单选题If emergency welding repairs must be made to the upper area of a fuel tank, the tank and/or adjacent compartments may need to be （）A
gas freedB
inertedC
filled with waterD
all of the above as necessary
考题
单选题Which step is NOT generally taken when gas-freeing a tank?（）.A
Washing the tank interior with sea waterB
Application of degreasing solventsC
Removal of corrosion products and sludgeD
Fresh air ventilation
考题
单选题Before entering a fuel tank that has been cleaned, it should be checked with an oxygen indicator and a/an（）.A
Orsat apparatusB
flame safety lampC
Halide torchD
combustible gas indicator
考题
单选题A tank has been sealed and unventilated for a long period of timeWhich of the following conditions does this indicate?（）A
The tank is safe to enterB
The tank is especially dangerous to enterC
Carbon monoxide is presentD
Water vapor present when the tank was sealed has oxidized
考题
单选题Following a grounding, you can best determine that a SLACK fuel oil tank has been holed by （）.A
sounding the tankB
waiting for the vessel to listC
examining tank boundariesD
checking fuel oil strainers
考题
单选题Which of the following needs to be done before a hard drive can be formatted?（）A
LabeledB
RebootedC
InitializedD
Defragmented
考题
单选题（）they are doing has never been done before.A
ThatB
WhatC
WhyD
Whether
热门标签
最新试卷