correl md2 quiz terms Flashcards
The driving force at the periphery of the driven pulley is called
Net belt tension
The axes of rotation of two meshing gears may be intersecting, what type of gears are these?
bevel gears
In general, bearings are known to be of what type?
radial bearing
This type of brake is not often used in electric cranes.
disk brake
Which of the following terms does not refer to the arc of contact between the belt and the pulley
angle of articulation
It is a friction device whose application is to transmit power to machines requiring frequent stopping and starting.
friction clutch
Centrifugal clutch is a
radial clutch
It is a term describing the load-carrying capability of a system
beyond the expected or actual loads.
Safety Factor
When a friction clutch has a new lining, the usual assumption in the calculation of the friction radius is ________.
uniform wear
The groove angel for V-pulleys are usually
32°-38°
In helical gears, it is the number of teeth that can be accommodated, for a given module, along a circumference or perimeter in the transverse plane.
Total number of teeth
This bearing material has a component of approximately 4.5% copper.
babbit metal
It is the width of the gear tooth measured parallel to the axis of rotation.
width of the face
When a shaft rotates in anticlockwise direction at slow speed in a bearing, then it will
move towards left of the bearing making metal to metal contact
Which of the following is considered a disadvantage for double helical gears?
manufacturing cost
This phenomenon results in relative motion between the belt and the pulley surfaces caused by belt extension or contraction when the belt passes from slack side to tight side or vice-versa.
crepe of belt
This type of sliding contact bearing material is usually utilized with steel journals.
cast iron
In helical gearing, it is the circular pitch in the diametral plane.
transverse circular pitch
Teflon is rapidly replacing nylon as wear surface material because
it has lower coefficient of friction
This force on a helical gear acts in the tangential plane parallel to the axis of the shaft carrying the gear.
axial force
In spur gears, which is not a radial distance?
backlash
It is a bearing material used in aircraft where fatigue strength is the most important consideration
silver
In Journal Bearings, what is the ratio of eccentricity to radial clearance
Attitude ratio
In helical gears, it is the number of teeth that can be accommodated, for a given module, along the circumference of the pitch circle in the plane of rotation.
Actual number of teeth
For Spur gears, the radial distance from the _____ to the clearance circle is called working depth
Addendum Circle
What type of bearing is the slipper bearing?
radial bearing
It is the ability of the bearing material to accommodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating.
Comformability
This type of brake is often used in electric cranes
double block brake
It is the circular pitch in the plane of rotation of a helical gear
circular pitch
In helical gears, the ratio of the transverse circular pitch to the tangent of the helix angle is
transverse module
The maximum face width for helical gears ranges from
20m-30m
It is the ability of bearing material to accommodate small particles of dust, grit etc., without scoring the material of the journal.
embeddability
It is a measure of the lubricating qualities under boundary conditions where base metal to metal is prevented only by absorbed film
oiliness
In this type of bearings, sliding takes place along the surfaces of contact between the moving element and the fixed element.
slipper or guide bearings
It is the property of a bearing material that permits the rapid or slow removal of the heat generated by friction.
thermal conductivity
Which one of the following is a positive drive?
Chain drive
