UPT Aircrew Flight Equipment Detailed Exam 2025

Which AFI states that aircrew will use supplemental oxygen anytime the cabin altitude exceeds 10,000 feet MSL? - Correct Ans-AFI 11-202 vol 3 What color cylinder is low pressure oxygen stored in? - Correct Ans-Yellow What color cylinder is high pressure oxygen stored in? - Correct Ans-Green At what PSI are low pressure cylinders considered full? - Correct Ans-425 +/- 25 psi At what PSI are high pressure cylinders considered full? - Correct Ans- psi At what PSI are low pressure cylinders considered empty? - Correct Ans-Operational: 100 psi Maintenance: 50 psi At what PSI are high pressure cylinders considered empty? - Correct Ans-Operational: 200 psi Maintenance: 100 psi In what unit is LOX measured? When is LOX considered full? Empty? - Correct Ans-Liters Full: 95% Empty: 10% One unit of liquid oxygen yields about _________ units of gaseous oxygen - Correct Ans-860 Low pressure LOX systems are usually found on what type of aircraft? What is the approximate line pressure? - Correct Ans-single/dual seat aircraft 70-90 psi AETC 50-120 psi USAF High-pressure LOX systems are usually found on what type of aircraft? What is the approximate line pressure? - Correct Ans-Multi-place aircraft 300 psi Solid state oxygen systems provide emergency oxygen via a _____________? For how long? - Correct Ans-chemical reaction 15 minutes What causes the chemical reaction in a solid state PBE or EEBD? - Correct Ans-sodium chlorate candle Users of a solid state oxygen system may detect a harmless amount of ____________ for about the first __________ seconds. - Correct Ans-chlorine 12 What does OBOGS stand for? - Correct Ans-On Board Oxygen Generating System In an OBOGS, Oxygen is extracted from engine bleed air through a ______________________. - Correct Ans-molecular sieve What type of oxygen system is utilized in the T-6? - Correct Ans-OBOGS In the event of an OBOGS failure the _____________ will supply approximately ___________________ of oxygen - Correct Ans-plenum 1 breath What two types of oxygen delivery systems are used in today's aircraft? - Correct Ans-Continuous flow Pressure demand With the exception of the oxygen generating system, each type of oxygen delivery system can be provided in a _________________ or a __________________ system - Correct Ans-fixed system (aircraft mounted) portable system (walk-around bottle) What is the transition altitude in the US? - Correct Ans-18,000 MSL The _____________ level is the altitude where the crew member selects an altimeter setting of _____________ during climb out and returns the altimeter to the __________ setting on descent. - Correct Ans-transition 29.92 local In a ________________ system, the regulator delivers continuously regardless of demand. - Correct Ans-continuous flow The emergency oxygen cylinder found in the ejection seat is a _____________________ system for emergency use up to ____________. - Correct Ans-continuous flow FL500 What is the operational and emergency ceiling for common continuous flow oxygen systems? - Correct Ans-FL250 op / FL300 emer In order for high-performance aircraft to operate at high altitudes (FL400), __________________ is insufficient to maintain normal levels of blood oxygen saturations. _________________ breathing is necessary to increase the lung pressure above the atmospheric pressure. - Correct Ans-100% oxygen Positive pressure The regulators used in a positive pressure system are different from _____________ demand system regulators, but function much the same until the ______________ feature is activated. - Correct Ans-diluter positive pressure _______________ regulators are the most widely used automatic pressure demand regulators in modern aircraft. - Correct Ans-Narrow panel The pressure demand system has an operational ceiling of _____________ and an emergency ceiling of _______________. - Correct Ans-FL430 FL500 What 3 components make up the fire triangle? - Correct Ans-Oxygen Heat Fuel Where is the oxygen regulator installed in the T-6 cockpit? - Correct Ans-Right side console What are three common regulators associated with pressure demand systems? - Correct Ans-CRU-68/A CRU-69/A CRU-73/A In the T-6, O2 concentration with the lever in NORMAL position will range from _________ to _________ for altitude from sea level to 15,000 MSL. - Correct Ans-25% to 70% In the T-6, O2 concentration with the lever in NORMAL position will range from _________ to _________ for altitude from 15,000 MSL to 31,000 MSL. - Correct Ans-45% to 95% In the T-6, with the lever in MAX position what is the O2 concentration? - Correct Ans-95% The _______________ light illuminates any time either concentration lever is in the MAX position - Correct Ans-maximum concentration The OBOGS regulator provides slight ______________ continuously while the supply lever is in the ON position. - Correct Ans-positive pressure The ____________ has two positions, placarded "ON" and "OFF" - Correct Ans-supply lever T or F? If the supply lever for either regulator, front or back seat, is on the OBOGS system is operative and can run down the battery. - Correct Ans-True The _____________ has two positions, placarded "NORMAL" and "MAX" - Correct Ans-concentration lever When the concentration lever is set to "MAX" the regulator directs the OBOGS concentrator to supply ________________. - Correct Ans-the highest possible O2 concentration The _____________ has three positions placarded, respectively, "EMERGENCY," "NORMAL," and "TEST MASK" - Correct Ans-pressure lever When the pressure lever is in the "EMERGENCY" position O2 is supplied with _______________ amount of water pressure and in the "TEST MASK" position O2 is supplied with ___________ amount of water pressure. - Correct Ans-2" 16" The built in test (BIT) button activates the initiated OBOGS BIT (I-BIT) any time after __________ and the ____________ warm-up. - Correct Ans-engine start 3 minute The I-BIT provides verification that the _________ and ___________ are operating properly. - Correct Ans-OBOGS sensor OBOGS FAIL annunciator During the I-BITthe "OBOGS FAIL" annunciator should extinguish within ______________. - Correct Ans-2 minutes What 3 things does the flow indicator tell you? - Correct Ans-1. If you have good flow 2. If you have a leak 3. If you are hyperventilating What do the colors of the flow indicator mean? - Correct Ans-Black = no flow (holding breath/exhale) White = flow (inhale) The T-6A OBOGS bleed air is tapped from a port on the ____________ side of the engine. - Correct Ans-left Where is the OBOGS unit located? - Correct Ans-Fuselage right side avionics bay Where does the OBOGS get oxygen? - Correct Ans-Extracts it from the engine bleed air T or F? A concentrator in the OBOGS unit automatically adjusts the oxygen concentration for the current altitude based on the current cockpit pressure. - Correct Ans-True The ____________ functions as a holding tank between the OBOGS unit and the regulators. - Correct Ans-plenum The emergency oxygen system in the T-6 is a _____________ pressure gas, _______________ flow system. - Correct Ans-high continuous The emergency O2 bottle in the T-6 provides 100% O2 for the first ___________ to ____________ minutes. After that the CRU-60/P (if ship supply hose is disconnected) mixes an increasing amount of ____________ until the bottle is depleted. - Correct Ans-2 to 4 ambient air What is the normal pressure (black band) on the T-6 emergency O2 cylinder? - Correct Ans- psi How long does the emergency O2 cylinder on the T-6 last? - Correct Ans-8 to 10 minutes T or F? Ejection automatically starts the positive flow of oxygen to the crew member. - Correct Ans-True What manually activates the emergency O2 bottle and where is it located? - Correct Ans-green control loop on the left side of each seat T or F? Pulling the green ring a second time will deactivate the emergency O2 bottle? - Correct Ans-False. Once activated the cylinder cannot be shut off until depletion. Air Force aircrews use the ________________ helmet. - Correct Ans-HGU-55/P What functions does the HGU-55/P provide? - Correct Ans-Protection from head injury and ambient noise mounting for the visor and oxygen mask communications T or F? The basic functions of the MBU-12/P mask and the MBU-20A/P mask are the same? - Correct Ans-True The MBU-series masks are designed for ____________ oxygen systems. - Correct Ans-pressure demand What is the main physical difference between th