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WorksheetsMechanical drive
Total questions: 20
Worksheet time: 28mins
the drive system shown in the figure is
belt drive
chain drive
gear drive
sprocket drive
the instrument shown is :
Dial Indicator
adjustable mounting brackets
Magnetic Base
Knobs
foundation is the structure that supports machine and designed to perform the function of
Support the load of the machine without settling
Maintain the alignment between coupled components
Absorb any vibrations
all of the above
lock washer makes sure that
the nut does not come loose
the bolt will not pull through the mounting hole.
flat washer will not damage the bedplate
the bolt is strong enough
which of the following classes of bolt has a larger value of strength
8.8
10.9
12.9
6.6
the least important features considered when selecting a fastener is
Length
Diameters
Class
washer thickness
Select the fastener size and type for mounting an electric motor in the following application:
Application: Air compressor drive
Duty: medium
Mounting hole size: 24 mm
Flat Washer Thickness: 3 mm
Lock Washer Thickness: 4 mm
Nut Thickness: 16 mm
M10.8 , 22 mm
M10.8 19 mm
M10.8 20
M10.8 24 mm
calculate the fastener length for mounting an electric motor in the following application.
Application: Air compressor drive
Duty: medium
Mounting hole size: 24 mm
Flat Washer Thickness: 3 mm
Lock Washer Thickness: 4 mm
Nut Thickness: 16 mm
106 mm
160 mm
98
102
An uneven mounting surface while mounting the motor will case :
Soft foot
Shaft run-out
Shaft end float
motor warping
calculate the shaft run-out value if the total indicator reading (TIR) equal = 0.06 mm
0.06 mm
0.03 mm
0.01 mm
0.12 mm
if the motor shaft is bent, this usually due to
high run-out
high end-float
high soft foot
high rotating speed
Instruments that measure motor speed are called
tachometers
dynamo-meters
Transducers
prony brake
if we have a machine with shaft of 15 mm which must be connected to a gear using key fastener, specify the best key type needed for this connection.
Square key
Rectangular Key
Gib head Key
Woodruff Key
for key and key-seat specifying issues as the application load increased then the tolerances must be
tighter tolerances
higher tolerances
tolerances are fixed regardless of the load
there is no effect
select the best material of the key fastener for the following application
Given Information:
1.Application: Shaft to coupling connection for a hydraulic system
2.Shaft diameter: 12 mm
3.Shaft keyseat length: 38 mm
High carbon steel
Zinc-Plated cold rolled steel
Brass
Cold rolled steel
Width and Height of key-seat are measured using
a Vernier caliper.
a micrometer
a rule
a tap measure
the head of the set-screw shown is
oval set screw
flat point set screw
dog point set screw
soft tipped set screw
the shown devise is called
prony brake
dynamo-meter
Transducer
Mechanical Drive System
Calculate the power delivered by a belt drive system shown
7500 watt
7.5 watt
750 Kwatt
0.75 kwatt
Calculate the maximum torque that can be generated by a motor given the following information.
Speed = 1140 RPM
Pout = 250 W
2.1 N.M
21 N.M
0.21 N.M
2.5 N.M
