NIVEL RNG MRO B787-2026 ATA 21

What are the three subsystems of the equipment cooling system?. a) Forward EE, Aft EE, Misc EE cooling. b) Flight deck, cabin, cockpit cooling. c) Avionics, engine, hydraulic cooling. d) Oxygen, fuel, electrical cooling.

How does the forward electronic equipment cooling system operate?. a) Push-pull airflow. b) Circular airflow. c) Vertical airflow. d) Horizontal airflow.

What is the function of the supply override valve?. a) Pull air through electronic equipment. b) Push air through supply fan. c) Supply air to smoke detector. d) Push air around barriers.

Where is the EE cooling application software primarily located?. a) In GPM L1. b) In GPM R1. c) In cockpit. d) In flight deck.

What components make up the forward cargo heating system?. a) Electric heater, supply valve, duct temp sensor. b) Oxygen and avionics systems. c) Fuel and hydraulic systems. d) Cockpit and cabin heating.

How is temperature controlled in the forward cargo compartment?. a) Heated mixed air via inline duct heater. b) Cold air from flight deck. c) Pressure regulation. d) Exhaust fan operation.

What role does the CCS play in forward cargo heating?. a) Calculates heater control using temperature sensors. b) Controls flight deck cooling. c) Regulates oxygen flow. d) Monitors cargo pressure.

Which components are part of the forward cargo heating system?. a) Electric heater, supply valve, temp sensor. b) Oxygen system. c) Fuel management system. d) Cabin heating.

How does the forward cargo heating system control temperature?. a) Moves warmed mixed air through duct heater. b) Circulates cold air. c) Adjusts pressure. d) Uses exhaust fan.

What role does CCS play in cargo heating control?. a) Uses temp sensors to calculate heater control. b) Controls avionics cooling. c) Regulates oxygen. d) Monitors pressure.

What is the purpose of the forward cargo air conditioning system?. a) Control temp 40°F to 80°F for cargo. b) Cool flight deck. c) Cool avionics. d) Control pressure.

How does the FCAC system reduce humidity?. a) Up to 70%. b) Up to 50%. c) Up to 90%. d) Up to 30%.

What does moving the FWD CARGO A/C switch from OFF do?. a) Turns on FCAC. b) Turns on heater. c) Activates exhaust fan. d) Closes heat valve.

Which panel controls forward cargo temperature?. a) P5 CARGO TEMP panel. b) P5 COOLING panel. c) P5 AVIONICS panel. d) P5 CABIN panel.

The air conditioning distribution system moves air via_______. a) overhead crew rest distribution. b) main and recirculation distribution. c) alternate ventilation. d) compact mixers only.

The CAC Add Heat Valve (AHV) ensures sufficient_______. a) motor speed. b) outlet air temperature. c) airflow rate. d) pressure.

The upper recirculation system moves _______air. a) moist. b) crown. c) smoke. d) electronics cooling.

The power electronics cooling system temperature is decreased by the ______. a) overhead crew rest. b) LGV system. c) main distribution. d) AVS.

Airflow to different cabin areas is regulated by _______ . a) sidewall returns. b) orifices. c) crown dryer. d) PAO.

Conditioned air reaches the flight deck via the _______. a) trim air. b) plenum/manifold. c) recirculation. d) AVS.

The air conditioning cooling subsystems include ______. a) main distribution and recirc. b) conditioned air and FCAC. c) overhead crew rest. d) trim air only.

Each pack bay contains _____CACs. a) Two. b) Three. c) Four. d) Five.

The AHV purpose is to ensure sufficient ______. a) outlet temperature. b) bearing speed. c) flow rate. d) pressure.

Air distribution flow regulation is provided by______. a) orifices. b) sidewall grilles. c) PAO. d) crown dryer.

Which component regulates air flow to different areas?. a) Orifices at duct connections. b) Sidewall return grilles. c) Personal air outlets.

Which component of the air distribution system regulates air flow to different areas?. a) Orifices at duct connections. b) Sidewall returns air grilles. c) Personal air outlet system. d) Crown dryer system.

Which system helps to decrease the temperature of the power electronics cooling system?. a) LGV system. b) Overhead crew rest distribution system. c) Main distribution system. d) AVS system.

How does the conditioned air reach the flight compartment?. a) From compact mixers mixed with trim valve hot air. b) From plenum/manifold. c) Through main distribution and recirculation air distribution. d) Via trim air system and ozone converter.