Quiz - Gears & Variable Speed Drives Flashcards
The distance from the centre of one tooth to the centre of the next tooth, measured along the pitch circle, is called…
a) diametral pitch
b) pitch diameter
c) circular pitch
d) outside diameter
c) circular pitch
With an internal spur gear and pinion drive, the shaft centre lines are…..
a) compounding
b) crossing over at 90 degrees
c) intersecting at 90 degrees
d) parallel
d) parallel
The input gear of the train has 32 teeth turning at 32rpm; it is connected to the 24 tooth output gear through a 16 tooth idler. What is the end result?
a) speed reduction, rotation change
b) speed increase, rotation change
c) speed reduction, no change in rotation
d) speed increase, no change in rotation
d) speed increase, no change in rotation
Angular bevel gears are also known as…
a) mitre
b) spiral bevel
c) straight bevel
d) zerol
c) straight bevel
Mitre gears have…..
a) the same number of teeth
b) shafts that cross over at 90 degrees
c) spiral cut teeth
d) varying ratios
a) the same number of teeth
The worm and worm wheel gears…..
a) have low sliding action
b) are of opposite hand
c) have parallel shafts
d) are of the same hand
d) are of the same hand
Of the following variable speed drives, which one would require a heat exchanger?
a) scoop tube
b) torque converter
c) variable speed chain drive
d) wet disc
d) wet disc
A compound gear reducer will have a minimum of…..
a) 2 shafts
b) 3 shafts
c) 4 shafts
d) 5 shafts
b) 3 shafts
The tie rod should be kept as near as possible to a _____ line running from the output shaft to the point of attachment.
a) 80°
b) 180°
c) 60°
d) 90°
d) 90°
The distance that one tooth on the worm advances in one turn is the…..
a) lead
b) pitch
c) pressure angle
d) helix angle
a) lead
Gears that have no effect on gear or speed ratios in a gear train are…..
a) pinion gears
b) idler gears
c) spur gears
d) internal gears
b) idler gears
Of the following, which one would best describe a mitre gear box?
a) shafts intersecting at 45° and same # of teeth
b) shafts intersecting at 45° and a different # of teeth
c) shafts intersecting at 90° and same # of teeth
d) shafts intersecting at 90° and a different # of teeth
c) shafts intersecting at 90° and same # of teeth
To obtain the greatest area of tooth contact in a worm and worm gear, use…..
a) non throated gear set
b) single throated gear set
c) double throated gear set
d) four start non throated gear set
c) double throated gear set
On a worm, the lead is equal to…..
a) the pitch
b) the pitch times number of starts on the worm
c) the pitch times the ratio of the gears
d) the pitch times the # of teeth on the worm wheel
b) the pitch times number of starts on the worm
To obtain backlash readings we could use…..
a) the bump check
b) a dial indicator
c) Prussian blue
d) a torque wrench
b) a dial indicator