Module - Gearing Fundamentals Flashcards
Gears are positive power transmission devices that are used where there can be no slippage.
a) True
b) False
TRUE
The pinion gear is usually the smallest gear in the set.
a) True
b) False
TRUE
Most gears are be made to the standards set by the AGMA.
a) True
b) False
TRUE
A drive using helical gears can have the gears set up so they are overhung.
a) True
b) False
TRUE
In a compound gear system there can be six gears and four shafts.
a) True
b) False
TRUE
The gear set shown in Figure 3 has a left-hand pinion and a right-hand ring gear.
a) True
b) False
FALSE
The flank of the gear tooth is located in the addendum.
a) True
b) False
FALSE
If the circular pitch is known, it is the best defining description of the gear teeth.
a) True
b) False
FALSE
A gear set that has a 20° pressure angle is stronger than a gear set with a 14° pressure angle.
a) True
b) False
TRUE
It is best to measure the backlash of a gear set at the pitch circle.
a) True
b) False
TRUE
A herringbone gear with a diametral pitch of 20 should have at least 0.005 inch backlash.
a) True
b) False
FALSE
A gear with a diametral pitch of 4 has very small teeth.
a) True
b) False
FALSE
A gear train has 15 gears meshing together with the input gear rotation in the clockwise direction (CW). The output gear should turn in the counter-clockwise (CCW) direction.
a) True
b) False
FALSE
If there are several gear reductions in a gearbox, with ratios of 4:1, 5:1 and 2.5:1, the final reduction of the gearbox will be 45:1.
a) True
b) False
FALSE
A gearbox has a 10:1 reduction driven by a 1hp electric motor at 1750 rpm. The output from the gearbox will be 10 hp at a speed of about 175 rpm. a) True
b) False
FALSE