2022海船船员精编在线题库(09月07日)

1. [单选题]在理论回热循环中，制冷剂经过回热器所产生的过热度比过冷度( )。

A. 小
B. 大
C. 相等
D. 不一定^{(not always)}

2. [单选题]对于有应力集中的构件，通常可以采用降低材料( )的办法来保证构件的安全。

A. 弹性极限
B. 强度极限
C. 许用应力
D. 危险应力

3. [单选题]By comparing the exhaust gas temperature of each cylinder, the operator can determine if the load is balanced throughout the engine The device most commonly used is a

A. tachometer
B. pyrometer
C. dynamometer
D. calorimeter

4. [单选题]Which of the following statements is correct regarding an oil with a high viscosity index?

A. A large change of viscosity occurs with a minor change in temperature
B. No change in viscosity occurs with any change in temperature
C. Very little change in viscosity occurs with a significant change in temperature
D. The viscosity of the oil increases with an increase in temperature

5. [单选题]船员个人装备有几种？

A. 二种
B. 三种
C. 四种
D. 五种

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