Drive Train & Rotors

Question 1

The drivetrain includes

a) Freewheeling unit, transmission, and tail rotor gearbox.

b) Main driveshaft, mast, tail rotor driveshaft, and oil cooler blower.

c) All are correct.

Answer 1

C) All are correct.

Question 2

During autorotation, the sprag clutch disengages and the rotational forces of the main rotor are used to drive the transmission accessories and the tail rotor drive system.

a) True.

b) False.

Answer 2

A) True

Question 3

During autorotation, the sprag clutch engages and the rotational forces of the main rotor are used to drive the transmission accessories and the tail rotor drive system.

a) True.

b) False.

Answer 3

B) False

Question 4

Which component provides a flexible drive coupling between the freewheeling unit and transmission?

a) Kaflex driveshaft.

b) Gimbal ring.

c) Thomas couplings.

Answer 4

A) Kaflex driveshaft.

Question 5

The transmission incorporates a(n) __________ suspension and restraint that absorbs normal vibrations and vertical movement.

a) Polymer infused vib-reduction.

b) Nodal beam.

c) Under mounted cross-member

Answer 5

B) Nodal beam.

Question 6

Components attached to the transmission include

a) Mast assembly and main driveshaft.

b) Transmission oil pump, rotor tach, and hydraulic pump.

c) All are correct.

Answer 6

C) All are correct.

Question 7

How many chip detectors are located on the transmission?

a) One located on the transmission, two located in the freewheeling unit.

b) Three on the transmission.

c) Two located on the transmission, a third is located in the freewheeling unit.

Answer 7

C) Two located on the transmission, a third is located in the freewheeling unit.

Question 8

The transmission has a(n) __________ system with a 5 quart capacity.

a) Dry sump.

b) Wet sump.

c) Axial flow.

Answer 8

B) Wet sump.

Question 9

The TRANS OIL TEMP light will illuminate if the transmission oil temperature reaches

a) 90°C.

b) 110°F

c) 110°C.

Answer 9

C) 110°C.

Question 10

What type of rotor system is used on the BH206L?

a) Rigid.

b) Semi rigid.

c) Fully articulated.

Answer 10

B) Semi rigid.

Question 11

What component is used to connect the tail rotor driveshaft sections?

a) Gimbal rings.

b) Universal joints.

c) Steel laminated flexible couplings (Thomas couplings).

Answer 11

C) Steel laminated flexible couplings (Thomas couplings).

Question 12

The tail rotor assembly is a __________ that consists of a hub and two interchangeable blades.

a) Delta-hinge.

b) Perpendicular-hinge.

c) Dual-hinge.

Answer 12

A) Delta-hinge.