Lifting Systems

Question 1

The caution “MM EXCEED” will illuminate on the Caution and Advisory Display (CAD) if the mast moment exceeds [a].

Answer 1

77%

Question 2

If the magnetic oil drain plug installed on the tail rotor transmission detects metal particles, will a chip light will illuminate in the cockpit to notify the pilot?

Answer 2

No

Question 3

The main gear is driven by the two engines and drives the main rotor, tail rotor, and accessories. The main transmission reduces the input RPM of the two engines to the required output RPM for the [a] [b] and [c].

Answer 3

Main rotor
Tail rotor
Accessories

Question 4

The [a] [b] system permits stopping of the main rotor as quickly as possible after the engines have been shut down.

Answer 4

Rotor
Brake

Question 5

To ensure oil circulation in the event of clogging, the oil filter assembly for the main transmission incorporates a [a] with an indicator button.

Answer 5

Bypass

Question 6

Do not operate the rotor brake until both engines are [a] and the rotor RPM (NR) is below [b]%.

Answer 6

Shutdown
50%

Question 7

Which system measures and indicates any bending moments occurring on the rotor mast?

[a] [b] [c]

Answer 7

Mast
Moment
Indicator

Question 8

What actions are required of the pilot if the pop-up indicator pin is found “popped” on preflight?

You must make a [a] and [b].

Answer 8

Write Up
Notify Maintenance

Question 9

On preflight, the oil level of the main transmission is checked via the [a] [b].

Answer 9

Sight
Glass

Question 10

The primary purpose of the tail rotor is to [a] the torque effect of the [b] rotor

Answer 10

Counteract
Main

Question 11

If this caution is displayed on the CAD it means that the [a] oil is contaminated by [b] particles.

Answer 11

Transmission
Metal

Question 12

When the rotor RPM is below 70%, the mast moment indication is depicted by a [a] scale ; what type of scale?

Answer 12

Linear

Question 13

Unlike many Army helicopters that have a fully articulated main rotor system, the UH-72 has what type of rotor system?

Answer 13

Rigid Hingeless

Question 14

On preflight, the oil level of the main transmission is checked via the [a] [b].

Answer 14

Sight
Glass

Question 15

The operational advantage of having a transmission with a “[a]” type Lubrication System is that the system consists of two identical lubrication circuits; if one circuit fails the other continues to lubricate the entire transmission system.

Answer 15

Redundant

Question 16

When the rotor RPM is above 70%, the mast moment indication is depicted by a [a] scale ; what type of scale?

Answer 16

Circular

Question 17

Which component reduces the engine output speed and transmits power from the engines to the main and tail rotor systems?

[a] [b]

Answer 17

Main
Transmission

Question 18

What component changes the power flow coming from the main transmission to the tail rotor gearbox?

Answer 18

Intermediate Gearbox

Question 19

Transmission oil pressure and temperature indications are displayed on [a] of the [b].

Answer 19

Lane 2
VEMD

Question 20

Which of the following design characteristics best describes how blade flap and lead-lag movement are accomplished?

-The hydraulic dampened main rotor hinges.

-The under-slung main rotor hub.

-The elasticity of the blades.

-The rigid rotor system is not designed to perform blade flap and lead-lag movements.

Answer 20

The elasticity of the blades

Question 21

The lift and propulsion required for flight are generated by the [a] [b] [c].

Answer 21

Main
Rotor
Blades

Question 22

The [a] [b] prevents a reverse power flow from the main transmission to the engines.

Answer 22

Sprag Clutch

Question 23

Refer to the graphic below to identify the main components of the UH-72A Lifting System. Match the component picture to its name.

-Main Transmission
-Main Rotor Blades
-Main Rotor Head
-Rotor Brake System

Answer 23

A. Main Rotor Head
B. Main Rotor Blades
C. Main Transmission
D. Rotor Brake System

Question 24

In forward flight, the Delta hinge system allows for [a].

Answer 24

Flapping