A three-way thermostatic control valve regulates the diesel engine cooling water temperature by passing a portion of the water （）.
A . around the engine
B . around the cooler
C . to the expansion tank
D . overboard
相似题目
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Thermostatic expansion valves can be adjusted for （）.
A . suction pressure only
B . head pressure only
C . superheat only
D . suction pressure and box temperature
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A ruptured diaphragm in a thermostatic expansion valve will cause the valve to （）.
A . open
B . close
C . remain in its position
D . flood the evaporator with refrigerant
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If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）
A . a low level in the engine expansion tank
B . excessively high coolant pressure
C . improper temperatures
D . malfunctioning of the jacket water heater
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Fire alarm system thermostats are actuated by（）.
A . smoke sensors
B . the difference in thermal expansion of two dissimilar metals
C . pressure loss due to air being heated
D . an electric eye which actuates when smoke interferes with the beam
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floata，b，c，问等式（a+b）+c==（b+a）+c和（a+b）+c==（a+c）+b能否成立？
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In order to maintain a constant outlet water temperature of 80-85℃ from the engine, a three-way valve is installed（）
A . at the jacket cooler outlet to control the flux through the engine
B . at the jacket cooler outlet to control the flux through the cooler
C . at the engine outlet to control the flux through the engine
D . at the engine inlet to control the flux through the engine
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A thermostatic expansion valve is properly controlling evaporator superheatAdjusting this valve to lower the superheat will result in a/an （）.
A . evaporator pressure decrease
B . evaporator coil over-feed
C . evaporator capacity increase
D . expansion valve diaphragm rupture
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Thermostatic steam pressure reducing valves are used in the fuel oil service system to control the（）
A . double bottom fuel oil tank temperature
B . heater supply steam flow
C . pressure of the fuel supplied to the burners
D . attemperator steam flow in the heater discharge circuit
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If an auxiliary diesel engine temperature is higher than normal ,but the thermostat is determined not to be defective you would suspect a /an （）
A . cavitation erosion in the water jackets
B . excess corrosion inhibitor in the coolant
C . dirty jacket water cooler
D . defective turbocharger
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A cracked diaphragm in a thermostatic expansion valve will cause the valve to （）.
A . return to a neutral position
B . flood the evaporator
C . open
D . close
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Which of the listed statements is a characteristic of the liquid charged power element used with thermostatic expansion valves?（）
A . At the designed operating temperature, the liquid refrigerant charge has changed to a vapor
B . The liquid refrigerant tends to collect at the bellows or diaphragm and reduces the valve sensitivity
C . The sensing bulb is empty of liquid refrigerant charge at the designed operating temperature
D . The sensing bulb is never emptied of liquid refrigerant under normal operating conditio
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int a=1,b=2,c=3;if(a>c)b=a;a=c;c=b;则c的值为2.
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当a=1,b=2,c=3时,执行以下程序段后a=【1】.if(a>c)b=a;a=c;c=b;
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当a,b,c的值分别为3，4，5时，以下各语句执行后a，b，c的值为多少（ ）if (a>c){a=b; b=c; c=a;}else{a=c; c=b; b=a;}printf(“%d,%d,%d”,a,b,c);
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设（A,*）为群，任意a，b，c∈A，如果a*b=a*c，则b=c。
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如下程序的输出结果是 。 main( ) { int a=1,b=2,c=3; if(a>c) b=a; a=c; //a=3 c=b; //c=2 printf(\a=%d,b=%d,c=%d\\n\,a,b,c); }
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设有定义：int a=1,b=2,c=3;以下语句中执行效果与其他三个不同的是A) if(a>b) {c=b,a=b,b=c;}B) if(a>b) {c=a,a=b,b=c;}C) if(a>b) c=a;a=b;b=c;D) if(a>b) {c=a;a=b;b=a;}
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a、b、c三个数，已知a×b＝24，a×c＝36，b×c＝54，求a+b+c＝()。
A．23
B．21
C．19
D．17
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表示关系a≤b≤c的C语言表达式为（)。A．（a＜=B) &&（b＜=C)B．（a＜=B) and（b＜=C)C．（a＜=b＜=C)D．（a＜
表示关系a≤b≤c的C语言表达式为()。
A．(a＜=B) &&(b＜=C)
B．(a＜=B) and(b＜=C)
C．(a＜=b＜=C)
D．(a＜=B) &(b＜=C)
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当a=1,b=2,c=3时,执行以下程序段后a=【1】.if （a>c） b=a;a=c;c=b;
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设为一个半群,a,b,c为S中的给定元素.证明:若a,b,c满足a*c=c*a,b*c=c*b那么（a*b)*c=c*（c*b).
设<img src='https://img2.soutiyun.com/ask/2021-01-04/978612143224146.png' />为一个半群,a,b,c为S中的给定元素.证明:若a,b,c满足
a*c=c*a,b*c=c*b
那么(a*b)*c=c*(c*b).
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When we stay at a room in a house with central air-conditioning system in summer, we should set the thermostat to a higher level in ______.
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【单选题】5、设[{a , b , c}，*]为代数系统，*运算如下： * a b c a a b c b b a c c c c c 则零元为（）。
A．a
B．b
C．c
D．没有
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当a，b，c的值分别为3，4，5时，以下各语句执行后a，b，c的值为多少？if（a＞c）{a=b;b=c;c=a;}else {a=c;c=b;b=a;}（）
A．5 ，5 ，4
B．3，4，5
C．4，4，5
D．5， 4，3
