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【单选题】
等效养护龄期应根据同条件养护试件强度与在标准养护条件下( )试件强度相等的原则确定。
A.
小于28d龄期
B.
28d龄期
C.
大于28d龄期
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举一反三
【单选题】Saltwater is typically provided to a refrigeration system to _____.
A.
cool the expansion valve
B.
prevent refrigerant superheating
C.
condense the refrigerant gas
D.
prevent motor overheating
查看完整题目与答案
【单选题】The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of_______.
A.
aluminum plates
B.
lead cathodes
C.
copper baffle plates
D.
sacrificial zincs
查看完整题目与答案
【简答题】盒子里有9个红色跳棋，2个黄色跳棋。任意摸出一个，可能出现（    ）种情况，分别是（    ）和（    ），摸出（    ）色跳棋的可能性大。
查看完整题目与答案
【单选题】Where are the zinc plates located? .
A.
saltwater side of the condenser
B.
refrigerant side of the condenser
C.
in the evaporator coils
D.
in the suction strainer
查看完整题目与答案
【单选题】Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to _____.
A.
reduce electrolytic action on heat exchanger metals
B.
keep heat transfer surfaces shiny and clean
C.
prevent rapid accumulation of marine growth
D.
provide a protective coating on heat exchanger surfaces
查看完整题目与答案
【单选题】In a flash type evaporator, all saltwater heaters are vented through individual vent cocks to the ______.
A.
saltwater heater shell
B.
second-stage condenser
C.
atmosphere
D.
second-stage flash chamber
查看完整题目与答案
【单选题】If a ship is to be laid up for an indefinite period, the saltwater side of the main condenser should be____
A.
left filled with saltwater with the sea valves closed
B.
drained and dried out after closing the sea valves
C.
left filled with saltwater with the sea valves open
D.
drained an refilled with saltwater after closing the sea valves
查看完整题目与答案
【简答题】盒子里有9个红色跳棋子，2个黄色跳棋子．任意摸出一个，可能出现______种情况，分别是______和______，摸出______色跳棋子的可能性大．
查看完整题目与答案
【单选题】The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with _____.
A.
a needle gun
B.
soap and water
C.
a wire brush
D.
a chipping hammer
查看完整题目与答案
【单选题】In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the_____.
A.
saltwater heater shell
B.
second-stage condenser
C.
atmosphere
D.
second-stage flash chamber
查看完整题目与答案
相关题目：
【单选题】Saltwater is typically provided to a refrigeration system to _____.
A.
cool the expansion valve
B.
prevent refrigerant superheating
C.
condense the refrigerant gas
D.
prevent motor overheating
查看完整题目与答案
【单选题】The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of_______.
A.
aluminum plates
B.
lead cathodes
C.
copper baffle plates
D.
sacrificial zincs
查看完整题目与答案
【简答题】盒子里有9个红色跳棋，2个黄色跳棋。任意摸出一个，可能出现（    ）种情况，分别是（    ）和（    ），摸出（    ）色跳棋的可能性大。
查看完整题目与答案
【单选题】Where are the zinc plates located? .
A.
saltwater side of the condenser
B.
refrigerant side of the condenser
C.
in the evaporator coils
D.
in the suction strainer
查看完整题目与答案
【单选题】Sacrificial zinc anodes are used on the saltwater side of diesel engine heat exchangers to _____.
A.
reduce electrolytic action on heat exchanger metals
B.
keep heat transfer surfaces shiny and clean
C.
prevent rapid accumulation of marine growth
D.
provide a protective coating on heat exchanger surfaces
查看完整题目与答案
【单选题】In a flash type evaporator, all saltwater heaters are vented through individual vent cocks to the ______.
A.
saltwater heater shell
B.
second-stage condenser
C.
atmosphere
D.
second-stage flash chamber
查看完整题目与答案
【单选题】If a ship is to be laid up for an indefinite period, the saltwater side of the main condenser should be____
A.
left filled with saltwater with the sea valves closed
B.
drained and dried out after closing the sea valves
C.
left filled with saltwater with the sea valves open
D.
drained an refilled with saltwater after closing the sea valves
查看完整题目与答案
【简答题】盒子里有9个红色跳棋子，2个黄色跳棋子．任意摸出一个，可能出现______种情况，分别是______和______，摸出______色跳棋子的可能性大．
查看完整题目与答案
【单选题】The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with _____.
A.
a needle gun
B.
soap and water
C.
a wire brush
D.
a chipping hammer
查看完整题目与答案
【单选题】In a flash type evaporator, all saltwater headers are vented through individual vent cocks to the_____.
A.
saltwater heater shell
B.
second-stage condenser
C.
atmosphere
D.
second-stage flash chamber
查看完整题目与答案