When a refrigeration compressor is in the ‘off’ cycle, the thermal expansion valve will（）. -题库考试答案搜索网

When a refrigeration compressor is in the ‘off’ cycle, the thermal expansion valve will（）.

单选题

2022-01-04 06:32

A、always be wide open when the compressor restarts
B、continue to operate as if the system were in operation
C、remain open until evaporator pressure equalizes, then close until the compressor restarts
D、always be completely closed until the compressor restart

查看答案

正确答案

试题解析

标签：船舶电气与船舶安全

感兴趣题目

In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating effect of the primary refrigerant can be increased by （）.

Insufficient refrigerant in a refrigeration plant may result in （）.

The heat removed from the refrigerant in the condenser of a refrigeration plant is the （）

Air or noncondensable gas is removed from a refrigeration system by a （）

In the refrigeration compressor the temperature of the vapor is （） by compression.

The effect of high vapor superheat in a refrigeration system, is a/an （）.

保持安全值班的目的包括：（） Ⅰ、避免船舶发生碰撞事故Ⅱ、避免船舶发生火灾Ⅲ、避免船舶污染环境

不符合“A”型船舶特点的其他船舶均称为“B”型船舶。

船长应负责保管的船舶安全管理方面的证书有（）。 Ⅰ．符合证明； Ⅱ．符合证明的副本； Ⅲ．船舶安全管理证书； Ⅳ．船舶安全管理证书的副本。

Noise in a refrigeration compressor can be caused by （）.

If a refrigeration compressor is running continuously without lowering temperature as normal in the refrigerator, the trouble may be （）.

A公司与B公司签订《船舶转让协议》，约定A公司将船舶转让给B公司，转让价格为XX万元B公司交押金X万元，以后每月支付船价及利息X万元，如两个月内不付转让费，A公司有权收回船舶由B公司负责办理船舶营运手续B公司中途无故退回船舶，已付的转让费不再退回，等等。B公司经营船舶一年后，以A公司提供的船舶陈旧，操纵性能差等为由，向A公司提出终止船舶转让协议。A公司欲协商，但协商不成，A公司收回船舶国籍证书，船舶技术证书及营运证书。该协议属海商法范围内的何种合同？该协议是否有效