海船船员考试
单选题Hydrocarbon vapors are usually detected by the use of the （）.A flame safety lampB combustible gas indicatorC gasometerD oxygen indicator
题目
flame safety lamp
combustible gas indicator
gasometer
oxygen indicator
参考答案和解析
相似问题和答案
第1题：
A deficiency in characteristics that render the quality of the material/service unacceptable is usually referred to as:
A defective
B defect
C non-conformance
D poor workmanship
E lack of fitness for use
第2题：
In C program, all variables must be(70)before use, usually at the beginning of the function before any(71)statements.
A．stated
B．writed
C．illustrated
D．declared
解析：译文：在一段C程序中，所有变量在使用前必须声明，通常在函数的可执行语句之前声明。
第3题：
A. cash
B. cheque
C. bank card
D. account transfer
第4题：
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 oxygen
B.the gas
C.the inert gas
D.the hydrocarbon vapour
第5题：
A. J0 errors detected in a specified interval
B. 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 interval
E. Bit Interleaved Parity (BIP) errors detected in a specified interval
第6题：
163 A deficiency in characteristics that render the quality of the material/service unacceptable is usually referred to as:
A. defective
B. defect
C. non-conformance
D. poor workmanship
E. lack of fitness for use
第7题：
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 motherboard
B．outside
C．inside the processor
D．on the CPU
解析：译文：计算机的主存在固定于主板的芯片上。
第8题：
●In C program，all variables must be (70) before use，usually at the beginning of the function before any (71) statements.
(70) A．stated
B．writed
C．illustrated
D．declared
(71) A．operate
B．active
C．executable
D．processing
【解析】译文： 在一段C程序中，所有变量在使用前必须声明，通常在函数的可执行语句之前声明。
第9题：
The use of portable electrical equipment in the pumproom on tank barges is prohibited unless ______．
A.The pumproom is gas-free
B.Spaces with bulkheads common to the pumproom are either gas-free，inert，filled with water，or contain grade E liquid
C.All other compartments in which flammable vapors and gases may exist are closed and secured
D.All of the above
第10题：
______is not one of the most important environmental factors that influence hydrocarbon biodegradation．
A.temperature
B.concentration of nutrients
C.nitrogen
D.oxygen