1.During pulley adjustment on a belt-driven blower, increasing the space between flanges will cause the blower to:
1.在调整皮带驱动鼓风机的皮带轮时，增加法兰之间的间隙会导致鼓风机：
2.Why are heating elements not all activated simultaneously in an electric furnace?
2.为什么电炉中的加热元件不是同时启动的？
3.The maximum allowed length of the power cord for a 240V window air conditioner is:
3.240V 窗式空调电源线的最大允许长度为：
4.On a ladder diagram, what does the abbreviation CC stand for?
4.在梯形图中，缩写 CC 代表什么？
5.The dry-bulb temperature in a room is mainly affected by:
5.房间内的干球温度主要受以下因素影响：
6.A heating equipment closet in a basement must include:
6.地下室的供暖设备柜必须包含：
7.Why would an electrician select aluminum wire instead of copper?
7.为什么电工会选择铝线而不是铜线？
8.For heat pump installations, supply ducts must be properly sized and ______.
8.对于热泵安装，送风管道必须尺寸合适且______。
9.How can the noise from a large fan in a central air conditioning unit be reduced?
9.如何降低中央空调机组中大型风扇的噪音？
10. In a furnace circuit, the thermostat is wired in series with which device?
10.在炉子电路中，温控器与哪个设备串联？
