WorksheetsMechatronics Mechanical Systems
Total questions: 35
Worksheet time: 18mins
Friction is resistance caused by two __________ rubbing against each other.
Bearings
wheels
hands
surfaces
One applications that takes advantages of both high and low amounts of friction is a(n) __________.
ice skater
belt sander
automobile brake
axle grease
The two types of friction are static friction and __________ friction.
stationary
non-moving
coefficient
kinetic
The units of measurement for the coefficient of friction is __________.
foot-pound
Newton-meter
kilogram
None of the above
The coefficient of friction is the ratio of the force of friction divided by the __________.
mass of the load
normal force
angle of the inclined plane
None of the above
A wheel reduces friction because __________ friction is less than sliding friction.
kinetic
static
grazing
rolling
An inclined plane is a flat surface set at an angle above the __________.
horizontal
vertical
conical
spherical
The mechanical advantage of an inclined plane is the ratio of the __________ of the inclined plane divided by its __________.
load, width
height, load
force applied, length
length, height
A cam is a wheel that, when combined with a cam follower, produces a __________ motion.
circular
oval
reciprocating
non-linear
The four properties of a cam are: rise, fall, __________, and constant velocity.
roundness
dwell
ebb
wane
A mechanical system for mechanical power transmission does not __________.
increase speed
decrease torque
change the direction of rotation
increase power
The purpose of having a clutch connecting two shafts together is to __________.
allow two shafts to be connected while running
multiply the torque of the drive shaft
allow for easier assembly and disassembly of the drive system
change the direction of rotation
The three (3) types of shaft-to-adjacent-shaft power transmissions are:
belt drive, clutch, gear drive
clutch, direct coupling, gear drive
belt drive, chain drive, gear drive
flexible coupling, direct coupling, sleeve coupling
Some rules for safe dress to wear around a machine when it is running are:
Wear safety glasses and gloves at all times.
Wear tight fitting clothing and heavy duty shoes.
Wear tight fitting clothing and heavy duty shoes.
Wear bright colored clothing.
In addition to dress rules, another rule you should follow with machinery is:
Always have someone else in the work area when starting a machine.
Do not work on wet floors.
Keep your tools around the work area so they are easy for you to reach.
The coupling provides a secure method of transmitting __________ from one shaft to another.
torque and thrust
heat
torque and speed
distance from motor to pumps
The flange coupling is classified as what type of mechanical coupling?
rigid
Flexible
Universal
Clutch
The advantage of the flexible jaw coupling is that it __________.
is less expensive
allows more misalignment
dissipates heat better
holds shafts together better
The two major types of misalignment that are corrected by shaft alignment are __________.
line of sight and vibration
angular and parallel
angular and vibration
parallel and line of sight
The procedure for aligning two shafts is to check and correct for __________ misalignment in two planes, vertical and horizontal.
side-view and top-view
coupling gap and space
angular and parallel
top and bottom
A __________ is a grooved disk which is attached to the shaft of a drive or prime mover.
driver sheave
driven sheave
fleet-angle sheave
primary sheave
A belt drive having a 12-inch driver pulley and a 6-inch driven pulley has a pulley ratio of __________.
72
2
0.5
18
In the calculation of shaft speed and shaft torques of a belt drive system, which of the following applies?
shaft speeds are inversely proportional to pitch diameters
an increase in pulley size causes the speed to increase
shaft torque is inversely proportional to pitch diameters
any change in speed caused by pulley ratio will not cause an opposite change in torque
One important characteristic of a timing belt is that __________.
it requires more tension than a V-belt
it will not slip during operation
it makes more noise than a flat belt
it is easier to replace than a V-belt
The V-belt should ride __________ in the groove with its top near the top of the sheave; the V-belt does not touch the __________ of the sheave.
high, bottom
low, bottom
high, top
low, sides
The most basic way to test the tension of a belt is to use __________.
a tension tester
a spring scale and straight edge
your sense of touch
a belt spanner
The three (3) basic components of a chain drive system are__________.
chain, roller, and pin
chain, driver sprocket, and driven sprocket
pins, roller, and bushings
chair, mater link, and roller
The sprocket ratio for a chain drive system having a driven sprocket with 54 teeth and a driver sprocket with 18 teeth is __________.
72
0.333
33
3
A chain drive system has a driver sprocket with 24 teeth and a driven sprocket with 72 teeth. If the driver shaft has 633 ft-lbs torque, the torque on the driven shaft will be __________.
133 ft-lbs
211 ft-lbs
1899 ft-lbs
3165 ft-lbs
Offset chain because of its offset design does not require a connecting link, for this reason it is normally used in __________.
heavy load and low speed applications
heavy load and high speed applications
light load and high speed applications
light load and low speed applications
Compared to a V-belt drive a chain drive __________.
requires more tension
is more efficient
is less efficient
needs less lubrication
Chain sag __________.
is measured at the driven sprocket
is measured at the driver sprocket
is measured midway between the sprockets
does not have a measurement
The purpose of the idler gear is to either __________ of the driven gear or transfer power to a location which is farther from the driver shaft.
increase speed
decrease speed
change the direction of rotation
increase torque
In a gear drive, the ratio of the __________can be used to compute the gear ratio.
pitch diameters
outer diameters
the gear pitches
shaft diameters
A gear drive has a 12 tooth driver gear and an 18 tooth driven gear. If the driver gear is rotating at 720 RPM, the rotational speed of the driven gear will be__________.
1080 RPM
680 RPM
480 RPM
280 RPM
