After text activity
I. Reading Exercises:
Exercise 1. Read and memorize using a dictionary:
|
Shuttle, aft, load, restore, logic |
Exercise 2. Answer the questions:
By what is electrical power controlled?
What is each assembly?
Where are power contactors located?
What does each LCA contain?
Exercise 3. Match the left part with the right:
1. To restore power to a) internal fuses
the load
2. Hybrid drivers are usually b) by assemblies
used
3. The hybrid drivers are pro- c) the RPC must be reset
tected by
.
4. Electric power is con- d) as a logic switch
trolled and distributed
Exercise 4.
Each of the mid, forward and aft PCAS (generates/supplies) and (provides/distributes) power to a corresponding mid motor controller (subsystem/assembly), forward (power/motor) controller assembly, forward load controller assembly (aft/mid) load controller assembly (ac/dc) power to (restore/activate) the corresponding ac power system.
II. Speaking Exercises:
Exercise 1. Describe multiple control inputs, EPDC, contactors, hybrid drivers using the suggested words and expressions as in example:
Multiple control inputs
Are required, is turned on, hybrid drivers, logic switch
Example:
If multiple control inputs are required before an RPC is turned on, hybrid drivers are usually used as a logic switch.
EPDC
Consists, three-bus system, distributes, sections, equipment, used
Contactors
Contains, switches, used, loads
Hybrid drivers
Contains, solid-state, used, logic switches, loads
Exercise 2. Ask questions to the given answers:
1) Question: ___________________________________________ ?
Answer: Two preflight buses are used only during ground operations.
2) Question: ___________________________________________ ?
Answer: Each assembly is an electrical equipment container or box.
3) Question: ___________________________________________ ?
Answer: The hybrid drivers are current protected by internal fuses.
4) Question: ___________________________________________ ?
Answer: To restore power to the load, the RPC must be reset.
