5-30. The oil charging cylinder of the vapor charging cart has a capacity of 68 cubic inches and an operating pressure of 100 psi at which of the following temperatures? 1. 120°F 2. 125°F 3. 130°F 4. 135°F 5-31. Refrigerant cylinders should never be filled to more than what percent of their capacity? 1. 65 percent 2. 75 percent 3. 85 percent 4. 95 percent Learning Objective: Indentify components and conditions pf the ECS for the cockpit, cabin area, and the nose avionics compartment of the SH-60B helicopter. 5-32. The SH-60B helicopter cabin cockpit and nose bay environ- ments are controlled by the ECS, which provides both heating and air conditioning within what temperature range? 1. 2° to 71°C 2. 2° to 73°C 3. 3° to 72°C 4. 5° to 70°C 5-33. Bleed air is applied to the air- cycle machine (ACM) through a modulating valve which functions in what capacity? 1. As an on/off valve and pressure relief valve 2. As an on/off valve and temperature control valve 3. As a pressure regulator and relief valve 4. AS an on/off valve and pressure regulator 5-34. With ECS selected ON (from engine source), maximum torque available is reduced by what percent? 1. 1.5 2. 2.5 3. 3.5 4. 4.5 5-35. In an overpressure condition, the overpressure switch will cause which of the following actions? 1. The ECS HI PRESS advisory panel light to come on 2. The modulating valve to close 3. System shutdown only 4. None of the above 5-36. (Refer to figure 3-19 and supporting material in the text.) The ECS control panel contains a three-position toggle switch to control the ECS operating modes. What are the three settings for this toggle switch? 1. OFF, ON, and MAN 2. OFF, AUTO, and MAN 3. OFF, ON, and RAM AIR 4. OFF, AUTO, and RAM AIR 5-37. The ECS will automatically shut down under which of the following conditions? 1. 2. 3. 4. Engine contingency power is selected with the contingency-power switch (CNTGY PWR) on either collective stick In any position of the AIR SOURCE ECS/START switch, when starting either No. 1 or No. 2 engine Both 1 and 2 above None of the above 5-38. Fan control is provided by the mission power (MSU PWR) switch, and by what other switch? 1. A 27°C temperature-sensing switch 2. A 27°C temperature-sensing switch located at each fan outlet 3. A 25°C temperature-sensing switch 4. A 27°C temperature-sensing switch located at each fan inlet Learning Objective: Recognize the purpose and function of the aircraft pressurization system to include maintenance and troubleshooting operations. 34