AT 202 Exam 2 UPDATED QUESTIONS
AND CORRECT ANSWERS
The hydraulic system on the CRJ700 powers what components? - CORRECT
ANSWER Primary/secondary flight controls, wheel brakes, nose wheel steering, landing gear
extension and retraction, and thrust reversers
Three types of principles of matter - CORRECT ANSWER Solid (fixed position), liquid (slip
past each other), and gas (remain separated)
Liquid compressibility - CORRECT ANSWER Liquids are considered non-compressible
Fluid - CORRECT ANSWER Any substance that continually flows under an applied force
Pascal's Law - CORRECT ANSWER When a force is exerted on a confined fluid, the resultant
pressure is transmitted equally and undiminished in all directions
Three types of hydraulic fluids - CORRECT ANSWER Vegetable-based, petroleum-based, and
synthetic
Hydraulic viscosity - CORRECT ANSWER The resistance of a fluid to flow
Disadvantage of synthetic based fluids - CORRECT ANSWER Damaging to wiring, paint,
insulation, etc
Types of materials used to build hydraulic lines - CORRECT ANSWER Aluminum or stainless
steel for rigid tubing, or flexible hose like teflon
Purpose of hydraulic reservoir - CORRECT ANSWER To supply fluid to pumps and system
components, expansion, air purging, filtration and sediment, and cooling
Why pressurized reservoir - CORRECT ANSWER So aircraft are able to fly at high altitudes
AND CORRECT ANSWERS
The hydraulic system on the CRJ700 powers what components? - CORRECT
ANSWER Primary/secondary flight controls, wheel brakes, nose wheel steering, landing gear
extension and retraction, and thrust reversers
Three types of principles of matter - CORRECT ANSWER Solid (fixed position), liquid (slip
past each other), and gas (remain separated)
Liquid compressibility - CORRECT ANSWER Liquids are considered non-compressible
Fluid - CORRECT ANSWER Any substance that continually flows under an applied force
Pascal's Law - CORRECT ANSWER When a force is exerted on a confined fluid, the resultant
pressure is transmitted equally and undiminished in all directions
Three types of hydraulic fluids - CORRECT ANSWER Vegetable-based, petroleum-based, and
synthetic
Hydraulic viscosity - CORRECT ANSWER The resistance of a fluid to flow
Disadvantage of synthetic based fluids - CORRECT ANSWER Damaging to wiring, paint,
insulation, etc
Types of materials used to build hydraulic lines - CORRECT ANSWER Aluminum or stainless
steel for rigid tubing, or flexible hose like teflon
Purpose of hydraulic reservoir - CORRECT ANSWER To supply fluid to pumps and system
components, expansion, air purging, filtration and sediment, and cooling
Why pressurized reservoir - CORRECT ANSWER So aircraft are able to fly at high altitudes
