AMT 2104 (HELICOPTER OPERATION AND MAINTENANCE) PRELIMS

Question 1

A ______ is a heavier than air-flying machine that generates lift using rotary wings or rotor blades.

Answer 1

Rotorcraft

Question 2

The helicopter that considered as America’s first production helicopter.

Answer 2

Sikorsky’s XR-4

Question 3

A model flying machine that used coaxial propellers and a coiled spring for propulsion

Answer 3

Helicopters

Question 4

A helicopter that used two 6.1 meters (20ft) counter rotation rotors driven by a 24 hp(18kW) Antoniette Engine

Answer 4

Cornu Helicopter

Question 5

The machine that achieved its first vertical ascent on either August 24 or September 29

Answer 5

Gyroplane No. 1

Question 6

The earliest references for vertical flight that came from China.

Answer 6

Chinese Top

Question 7

Opposes the downward force of weight.

Answer 7

Lift

Question 8

Retarding force caused by disruption of airflow by the wing, rotor, fuselage, and other protruding objects.

Answer 8

Drag

Question 9

Combined load of the helicopter itself, the crew, the fuel, and rhe cargo or baggage.

Answer 9

Weight

Question 10

Force produced by the powerplant/propeller or rotor

Answer 10

Thrust

Question 11

Most common type of helicopter configuration

Answer 11

Singe rotor configuration

Question 12

Two main rotors mounted on one mast, sharing the same axis of rotation but turning in opposite directions.

Answer 12

Co-Axial Rotor

Question 13

The most challenging part of flying a helicopter

Answer 13

Hovering Flight

Question 14

The tip path plane is tilted in the direction that flight is desired.

Answer 14

Sideward Flight

Question 15

The tip-path plane is tilted rearward, which, in turn, tilts the lift-thrust vector rearward

Answer 15

Rearward Flight

Question 16

An upward sweeping angle of the rotor blades as a result of lift and centrifugal force.

Answer 16

Coning

Question 17

Also referred to as the law of conservation of angular momentum

Answer 17

Coriolis Effect

Question 18

The rotors are mounted at the edge of the wings, on nacelles that rotate in order to transition the rotors from the vertical position to the horizontal position.

Answer 18

Tilt Rotor

Question 19

On what date sikorsky took the VS-300 on its first flight?

Answer 19

Sept . 14, 1939

Question 20

A separate rotor that overcomes torque.

Answer 20

Tail Rotor

Question 21

The rotorcraft had a 45-horsepower engine , just powerful enough to hover for 2 minutes.

Answer 21

Gyroplane No.1

Question 22

The cyclic pitch control varies the lift of the main rotor by increasing or decreasing the pitch of all blades at the same time. TRUE OR FALSE?

Answer 22

False (Collective)

Question 23

Rotating the grip inboard increases rpm, and rotating it outboard decreases rpm. TRUE OR FALSE?

Answer 23

False (outboard, inboard)

Question 24

During the 1992 Persian Gulf War, the AH-64 “Apache” helicopter performed well as both a tank killer and fast- assault vehicle. TRUE OR FALSE?

Answer 24

FALSE (1991)

Question 25

A coaxial rotor helicopter has two main rotor systems and no tail rotor, usually the rear rotor is mounted at a higher position than the front rotor. TRUE OR FALSE?

Answer 25

FALSE (DUAL/TANDEM)

Question 26

Autogiro No. 4 is considered to be the first controlled helicopter flight. TRUE OR FALSE?

Answer 26

TRUE

Question 27

The throttle control is mounted on the cyclic pitch grip and is operated by rotating the motorcycle–type grip. TRUE OR FALSE?

Answer 27

FALSE (COLLECTIVE)

Question 28

All primary controls are actuated through push-pull tubes and bellcranks. TRUE OR FALSE?

Answer 28

TRUE

Question 29

UH-60 is the most popular helicopter in the U.S. military. TRUE OR FALSE?

Answer 29

TRUE

Question 30

The Anti-Torque Pedals, also known as “torque control” provides for movement about the vertical axis. TRUE OR FALSE?

Answer 30

TRUE

Question 31

The Cyclic Pitch Control is located on the left side of the pilot’s seat and is operated with the left hand. TRUE OR FALSE?

Answer 31

FALSE (COLLECTIVE)

Question 32

a sensing device that senses rotor and engine r.p.m. and makes the
necessary adjustments in order to keep rotor r.p.m. constant.

Answer 32

Governor

Question 33

also known as “torque control” provides for
movement about the vertical axis
(yaw).

Answer 33

Anti - Torque Pedal

Question 34

7 Types of Helicopter Configuration

Answer 34

Single Rotor System
Tandem Rotor
Co- Axial Rotor System
Synchropter
Side by Side Configuration
Tilt Rotor Configuration
No Tail Rotor Configuration

Question 35

Four forces acting on helicopter

Answer 35

Thrust
Drag
Lift
Weight