Quiz 4

(ATA 21) Which component controls the nponent controls the operation of recirculation fans in normal condition? (CTC - cabin temperature controller: ECSMC - environmental control system miscellaneous card ECSMC). Left CTC. Right CTC. ECSMC.

(ATA 21) Which statement best describes the purpose of Economy Cooling Valve (ECV)?. ECV meters the air flow thru airconditioning pack when FCSOV fully opened. ECV opens to prevent ACM stall at altitudes higher than 26000ft. ECV opens to let air go around the ACM turbine 1 and the water separation parts of the pack.

(ATA 21) Which cabin parameter is accurately controlled by the ASCPC in backup mode. Pressurization and temperature. Pressurization only. Temperature only.

(ATA 21) The aft equipment cooling system provides cooling air for components in th E11 rack and: Aft galley. APU battery and chaSatcom. Satcom system.

(ATA 21) What statement about equipment cooling override valve is correct?. In the override position, the cooling valve and the smoke removal valve are closed. In the override position, the cooling valve is opened and the smoke removal valve is close. In the normal position, the cooling valve is opened and the smoke removal valve is close.

(ATA 21) When does advisory message EQUIP COOLING appear?. There is low flow in the equipment cooling system in the air for 5 minutes. Smoke is detected in the equipment cooling system on the ground. There is low flow in the equipment cooling system on the ground for 5 minutes.

(ATA 21) What does "Standby cooling mode" mean?. CTCs can control Ram air actuator door to full opened position in case ACM failure. Turbine bypass valve can be fully opened to bypass turbine second stage of ACM. Economy cooling valve can be used to bypass the ACM if the ACM fails.

(ATA 21) The ram air inlet doors are normally open with the airplane on the ground. What you have to use for closing them if necessary?. Air Supply Cabin Pressure Controller ground test. Cabin Temperature Controller BITE test. Maintenance Access Terminal special function.

(ATA 21) What statement about outflow valves is correct?. Forward and aft outflow valves are not interchangable. You can remove the forward outflow valve only from inside the airplane. Each outflow valve are operated by two AC and one DC motors.

(ATA 21) What does the forward equipment cooling system use to remove smoke from the flight deck?. Supply fans. Extractor fans. Differential pressure.

(ATA 21) The positive pressure relief valve opens when cabin air pressure: Is differential to the remote ambient pressure sense port by 8.95 psi. Is lower than ambient pressure by a set value. Is higher than ambient pressure by a set value.

(ATA 21) What does the turbine bypass valve control?. The amount of hot air that goes around turbine of the ACM. The amount of reheater air that goes around the first stage turbine of the ACM. The amount of condenser air that goes around the second stage turbine of the ACM.

(ATA 21) The negative pressure relief vent is a spring-loaded door. The door starts to open at a differential pressure of: 1.5 psi. 8.95 psi. 0.2 psi.

(ATA 21) SATCOM backup fan is used to pull the air thru electronic components in E11. When is this fan on?. When both lavatory/galley ventilation fans don't work. When the airplane is in the air (WOW=false). When the airplane is on the ground (WOW).

(ATA 21) Trim Air PRSOV is electrically controled and: Electrically operated, and fail safe designed to close position by spring. Pneumatically operated, and fail safe designed to close position by torque motor. Pneumatically operated, and fail safe designed to close position by stepper motor.

ATA 21) What will happen if Ram air inlet door RVDT fails?. The Ram air inlet door RVDT failure doesn't affect on door control. The CTC moves the related actuator to the full open position. The Ram air inlet door stays in the last position just before failure.

(ATA 21) What is the total air outflow distribution through forward and aft outflow valves if you set both outflow valves in Auto mode?. 20% - foraward valve and 80% - aft valve. 50% - foraward valve and 50% - aft valve. 80% - foraward valve and 20% - aft valve.

(ATA 21) What happens to the recirculation system when the airconditioning system is in single pack operation?. The CTC turns off the lower fan on the same side as the unserviceable pack. The CTC turns off the upper and lower fan on the same side as the unserviceable pack. The CTC turns off the lower fan on the oposite side to the unserviceable pack.

(ATA 21) The ram air inlet doors are normally open with the airplane on the ground. What you have to use for closing them if necessary?. Cabin Temperature Controller BITE test. Maintenance Access Terminal special function. Air Supply Cabin Pressure Controller ground test.

(ATA 21) What does the forward equipment cooling system use to remove smoke from the flight deck?. Supply fans. Differential pressure. Extractor fans.