WorksheetsMachine Design and Shop Practices Elements (Module 1)
Total questions: 30
Worksheet time: 15mins
The function of the clutch in the machine tool is:
Lowering of drive speed
Alignment of drive shaft
To disconnect or connect at will the drive
To ensure that two shafts line up at high speed
Height of the tooth above the pitch circle or the radial distance between the pitch circle and the top land of the tooth.
top root
addendum
land
hunting tooth
In involute teeth, the pressure angle is often defined as the angle between the line of action and the line tangent to the pitch circle. It is termed as:
helix angle
angle of recess
angle of obliquity
arc of action
In the selection of wire rope, regular lay means wires and strands are arranged in the following manner:
twisted in the same direction
twisted in any direction
twisted in the opposite direction
twisted in along direction
Also called an eccentrically loaded bearing, it is
full bearings
offset bearing
partial bearing
fitted bearing
The property of a material that relates the lateral strain to the longitudinal strain.
stress
strain
Poisson's ratio
endurance limit
The angle included between the side of the thread measured in an axial plane in a screw thread:
angle of thread
angle between thread or 40°
helix angle thread
half angle thread or 20°
Flat leather belting is not recommended for use in excess of fpm.
3600
4800
6000
all of these
The reciprocal of a diametral pitch, or the ratio of pitch diameter to the number of teeth.
lead
module
involute
clearance
For an evenly distributed and uniform wear on each meshing gear tooth, the ideal design practice is to consider
wear resistance alloy addition to tooth gear
heat treatment of the gears
hardening of each tooth
hunting tooth addition
The changes in shape or geometry of the body due to the action of a force on it is called deformation or
shear stresses
stresses
compressive stress
strain
The differential of the shear equation is which one of the following:
bending moment of the beam
tensile strength of the beam
slope of the elastic curve
load of the beam
Gear used to transmit power at high velocity ratios between non-intersecting shafts that are usually, but not necessarily, at right angles.
helical gear
bevel gear
worm gear
spiral gear
The ratio of the moment of inertia of the cross-section of the beam to the section modulus:
equal to the radius of gyration
equal to the area of the cross-section
measure of a distance
dependent on the modulus of elasticity of the beam
Opposite direction parallel forces:
concurrent
coplanar
couple
non-coplanar
Which of the following is not a structural class of steel?
high speed steel
tool and die
low carbon
high carbon
Continuous stretching under load, even if the stress is less than the yield point:
plasticity
elasticity
creep
ductility
It is recommended for high-speed applications that the minimum number of teeth in a small sprocket should be:
26 to 30
12 to 16
26 to 28
18 to 24
In gear design, the ratio of pitch diameter in inches to the number of teeth is called:
module
diametral pitch
English module
Circular
The concave portion of the profile where it joins the bottom of the tooth space:
fillet
addendum
dedendum
clearance
The distance of the tooth which is equal to the addendum and dedendum:
A full
whole
working depth
dedendum
Stresses that are independent of loads:
working stress
operating stress
residual stress
shear stress
It is used to change rotary motion to reciprocating motion:
helical gear
rack gear
worm gear
spur gear
It is recommended not to have a direct drive and sprockets if the ratio of their teeth exceeds
10 times
8 times
5 times
6 times; use two or more step combinations.
The motion of an object with diminished/decreased speed:
deceleration
all of the above
retarded motion
negative impulse
Most popular soldering material:
10/80
45/55
50/50
60/40
The following pertain to the joining of metals except:
welding
soldering
casting
brazing
Killed steel is always associated with
silicon
manganese
phosphorous
sulfur
The usual ratio of water to soluble oil used as cutting fluid:
50% water to 50% oil
2 parts water to 1 part oil
3 parts water to 1 part oil
4 to 80 parts water to 1 part oil
The good deoxidizer in steel melting:
Manganese
Silicon
All of these
Aluminum
