Part 66 Preparation

Lubricants and Fuels

Gas turbine engine oil must have a…………. For good load-carrying ability ?
1. Normal viscosity
2. High viscosity
3. Low viscosity
Oil analysis programs identify and measure wear metals in………... By weight ?
1. Parts per milligram (pgm)
2. Parts per millimeter (ppm)
3. Parts per million (ppm)
Diethylene glycol solutions that works in a fuel as ?
1. Antifreeze
2. Add freeze
3. Antimicrobe
Jet fuel Color is ------ ?
1. Red
2. Pink
3. Colorless
This is a blend of jet a and gasoline, has higher volatility with a vapor pressure between 2 and 3 psi ?
1. Jet c
2. Jet 8
3. Jet b
It is desirable to use a fuel that is………..In volatility to resist vapor lock and evaporation ?
1. Low
2. High
3. No effect
Turbine engine fuels typically have a ……... Sulfur content than gasoline ?
1. Lower
2. Higher
3. Same
Viscosity and temperature relationship is ?
1. Directly proportional
2. Inversely proportional
3. Constant proportional
Dynamic viscosity also termed as ?
1. Absolute viscosity
2. Absolute density
3. Absolute temperature
Mil-l-7808, which is a military speciﬁcation for turbine oil, was ……...Turbine oil ?
1. Type III
2. Type II
3. Type I

Bearings

Ball bearing support loads ?
1. Radial loads
2. Thrust loads
3. Thrust and radial loads
The bearing is usually locked in position by a steel ?
1. Circlip
2. Snap ring
3. Locking wire
These seals are usually spring loaded ?
1. Carbon seal
2. Rubber seal
3. Helical seal
Roller bearing support loads ?
1. Radial loads
2. Thrust and radial loads
3. Thrust loads
This bearings reduces vibrations transmitted to the engine ?
1. Radial bearings
2. Roller bearings
3. Hydraulic bearings
These seals also may be pressurized to minimize oil leaking along the compressor shaft ?
1. Labyrinth type
2. Labyrinth or thread type
3. Thread type
Carbon seal are similar in material and application to the carbon brushes used in ?
1. Oil motors
2. Hydraulic motors
3. Electrical motors
Antifriction bearings are preferred largely because they oﬀer ?
1. More rotational resistance
2. Little rotational resistance
3. No rotational resistance
The rotor shaft also provides the matching surface for the oil seals in the bearing housing, These machined surfaces are called ? A
1. Lands
2. Grooves
3. Cuts
These bearings support both thrust and radial loads ?
1. Needle bearing
2. Roller bearing
3. Ball bearing

December 13, 2020 English Grammar, Quiz

ANTONYMS

Lubricants and Fuels