更多"The words such as quantity, grade, "的相关试题:
[单项选择]The viscosity regulator controls the fuel oil temperature （） provide oil at the correct viscosity for combustion.
A. in order that
B. because of
C. in order to
D. owing to
[单项选择]Lubricating oil viscosity in an operating diesel engine can be reduced by（）
A. increasing cooling water flow
B. increasing lube oil flow
C. dilution by fuel oil
D. adding SAE 70 oil
[单项选择]If the viscosity of the liquid being transferred remains constant as the discharge pressure increases, the rotary pump （）.
A. capacity will increase
B. capacity will decrease
C. suction pressure will increase
D. suction pressure will decrease
[单项选择]A viscosity regulator used for an engine is usually provided in order to （） for an engine burning heavy fuel oil.
A. regulate the fuel supply
B. maintain a constant fuel viscosity at the fuel valves
C. maintain efficient cooling
D. alter the fuel density
[单项选择]To assist separation of low viscosity oils steam coils or electric heaters are fitted （） of the oily water separator.
A. in entrance
B. in exit
C. in the upper part
D. on the outside
[单项选择]Cylinder oil is a high viscosity mineral oil, with a （） machined to the anticipated sulfur content of the fuel.
A. TAN
B. TBN
C. SAN
D. SBN
[单项选择]The viscosity regulator controls the （） of the fuel oil in order to provide the oil at the correct viscosity for combustion.
A. temperature
B. pumping rate
C. pressure
D. heat
[单项选择]The viscosity regulator controls （） in order to provide oil at the correct viscosity for combustion.
A. the engines speed
B. the engines load
C. the fuel oil temperature
D. the fuel oil flow
[单项选择]设有关系SC（S，C，GRADE），主码是（S，C）。遵照实体完整性规则（）
A. 只有S不能取空值
B. 只有C不能取空值
C. 只有GRADE不能取空值
D. S与C都不能取空值
[单项选择]The degree to which the viscosity of an oil will change with a change in temperature is indicated by the （）.
A. weight designation
B. viscosity index
C. pour point
D. thermal change value
[单项选择]设关系数据库中有一个表S的结构为S（SN，CN，grade），其中SN为学生名，CN为课程名，二者均为字符型；grade为成绩，数值型。若要把“郑欣的化学成绩80分”插入S表中，正确的语句是（）。
A. ADD INTO S VALUES（‘郑欣’，‘化学’，‘80’）
B. INSERT INTO S VALUES（‘郑欣’，‘化学’，‘80’）
C. ADD INTO S VALUES（‘郑欣’，‘化学’，80）
D. INSERT INTO S VALUES（‘郑欣’，‘化学’，80）
[单项选择]设关系数据库中的一个表S的结构为：S（SN，CN，grade），其中SN为学生名，CN为课程名，二者均为字符型grade为成绩，数值型，取值范围0~100若要更正王二的化学成绩为85分，则可用以下哪条语句进行更新（）
A. UPDATESSETgrade=85WHERESN=’王二’ANDCN=’化学’
B. UPDATESSETgrade=85WHERESN=王二ANDCN=’化学’
C. UPDATEgrade=85WHERESN=’王二’ANDCN=’化学’
D. UPDATEgrade=’85’WHERESN=’王二’ANDCN=’化学
[单项选择]The viscosity of an oil is a measure of its （）.
A. weight
B. internal friction
C. demulsibility
[单项选择]Grade No.1 rubber bales are mixed up（）grade No.4.
A. by
B. from
C. with
D. against
[单项选择]During transfer operations，a quantity of propylamine spills on deck. According to the Chemical Data Guide，the correct procedure would be to（）.
A. immediately flush the spill with large quantities of fresh water
B. cover the contaminated surface with soda-ash-soaked lime solution
C. add sodium bisulfate on the contaminated surface and spray it down with water
D. move to a position upwind of the spill and allow the product to boil off
[单项选择]The oil quantity for bearing lubrication should be applied in such an amount as to be sufficient to carry away the （） caused by the friction at the bearings.
A. acids
B. additives
C. heat
D. gear
[单项选择]Regulations require that tankers handling grade B liquids shall have their cargo pumps separated from all sources of vapor ignition by（）.
A. cofferdams
B. empty cargo spaces
C. gas tight bulkheads
D. areas equipped with power ventilation
[单项选择]The quantity or condition which is measured and controlled is known as the （）
A. controlled variable
B. manipulated variable
C. set point
D. control point
