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WorksheetsREADINGS MD 1.3
Total questions: 108
Worksheet time: 54mins
_____ forces mean when their lines of action can be extended to meet to one point.
concurrent
centroids
collinear
resultants
Imaginary formed by the intersection of the flanks of a thread when extended is called ___.
sharp crest
sharp root
root apex
all of these
Permissible variation of the manufactured or machined dimensions is called:
intolerance fits
deviation
allowable
tolerance
Molybdenum-chromium-nickel steel designation:
SAE 48xx
SAE 43xx
SAE 56xx
SAE 46xx
_____ is also called strain hardening.
work hardening
quenching
annealing
normalizing
A major alloy in tool steel.
Cr
FeN
Cobalt
Mn
Distance measured perpendicular to the axis between the crest of the thread and the root of its mating thread in a thread assembly of screws.
tolerance class
crest truncation
crest clearance
tolerance limit
Bearing surface that completely surrounds the journal is also called ____.
offset bearing
full bearing
centrally loaded bearing
babbitt learning
The width of a tooth space exceeds the thickness of each of the engaging tooth on the pitch circle ______.
allowance
bottom land
top land
backlash
_____ addition imparts resistance to atmospheric corrosion in steel, etc.
aluminum bronze
Manganese
Copper
bronze
Should two equal and opposite collinear forces be added to the forces already in equilibrium, which of the following statement is true?
Unbalanced of moment is maintained.
Equilibrium is disturbed.
Equilibrium is maintained.
It increases an unbalanced situation.
Iron based alloy containing 9-16% chromium.
Mn Hadfield steel
chrome-alloy steel
stainless steel
high chrome steel
A rule of thumb, the speed limit of flywheel rim speed should be 6000 fpm for cast iron material and for cast steel flywheel rim at _____ meters/min.
3050
4500
7000
10000
The distance between rivet centers nearest each other in adjacent rows is called _____.
pitch
back pitch
margin
diagonal pitch
The purpose of lubrication is as mentioned, EXCEPT:
to lighten the load
prevent corrosion/adhesion
prevent adhesion
cool the moving elements
The process of peening the joint portion immediately after the welding greatly improves the fusion structures, avoids possible cracking, avoids possible distortion, etc. Peening is also called _____ process at the same time.
tempering
martempering
normalizing
annealing
Resultant of two or more component forces is called _____.
component forces
resultant
component
collinear forces
For stable equipment foundation, the total combined engine, driven equipment and foundation center of gravity must be kept below the foundations top that usually about _____ times the usual total combined weight of the machine it is supposed to support.
3 to 4
3 to 7
2 to 4
3 to 5
All associated with standard materials specification, EXCEPT:
American Iron and Steel Institute
Southeast Asia Iron and Steel Institute
Society of Automotive Engineers
American Society for Testing Materials
It is ideal for maximum quietness in sprocket drive operation to choose ___ or more teeth.
24
18
27
21
Shafting up to 3 inches in diameter is usually made from cold rolled steel and the common biggest diameter of cold rolled steel is ______.
4 1/4 inches
6 7/8 inches
6 3/4 inches
5 inches
Designated pipe color used in communication:
silver gray
aluminum gray
bare
white
Not part and in fact should not be used in the steel melting process.
coke
silicon
zinc
aluminum
It is rigid piece which serves to transmit force from a piece to another piece or to cause/control motion.
follower
crank
motion
link
Type of bolt commonly used in construction that is threaded at both ends.
stud bolt
acme thread
hex bolt
square threaded bolts
The normal helix angles in helical gears is recommended in the range of degrees.
less than 18
20 to 35
15 to 25
20 to 30
The ratio of stress acting on an elastic substance to the decrease in volume per unit volume is called which property?
Bulk modulus
Modulus of resilience
elastic limit
modulus of elasticity
Rule of thumb in calculating the equipment foundation mass: it should be how many times the weight of the machinery it is supposed to support?
3–5
3–6
3–9
2–4
The welding made along the edges of two parallel plates is called what?
groove joint
fillet joint
edge joint
corner joint
Which class of material exhibits decreased electrical conductivity with increasing temperature?
aluminum
p-type semiconductors
metals
n-type semiconductors
Cast iron flywheels are commonly designed with a factor of safety of:
10 to 13
10 to 12
10 to 14
8 to 13
Stress relieving is also _____ for the purpose of reducing the internal stresses of steel material/metal.
tempering
normalizing
all of these
annealing
A ridge of uniform section in the form of a helix cut around the circumference of a cylinder and advancing along the axis.
thread roots
helix thread
screw threads
chamfers
Martensite (stainless steel) contains 4 to 26% Cr and a maximum of _____% nickel.
2.5
3.25
3.5
2.0
The design stress and factor of safety are related in the following manner:
design stress = ultimate stress/factor of safety
ultimate stress = factor of safety/design
design stress = factor of safety/times stress concentration factor
none of these
The material that can cut/wear substances subjected to:
carbide
abrasive
tungsten
vanadium
A resulting factor that replace two or more forces acting together.
vector
couple
resultant
equilibrant
Peculiar strength of the metal to resist being crushed.
shear strength
ultimate strength
compressive strength
elastic limit
Which of the following is not a viscoelastic material?
Teflon
plastic
all of these
metal
Alloy steel used in manufacturing bolts, studs, and tubing subjected to torsional stresses.
AISI 3141
AISI 2330
AISI 4830
AISI 4310
Method of finishing/shaping a machine part of exceptionally high carbon or high chromium steel parts (or very hard material).
using oxygen lancing
machining using carbide insert
using abrasive grinding
machining high speed tool steel
In a chain drive design for large speed reduction it is preferable to use a double reduction or compound type of transmission instead of single two sprockets transmission. Drives should be so designed that the angle between two tight chain strands does not exceed _____ degrees.
45
60
55
90
Steel springs are made of high carbon steel, heat treated and/or cold work to a high elastic limit to get good elastic deflection. In general, the carbon content is at ______.
0.40% or more
0.65% or more
0.50% or more
0.66% or more
The surface along the fillet curves or between the fillet radius of the two adjacent teeth of a gear.
bottom land
flank
fillet
top land
Not adaptable to welding due to low tensile strength and poor ductility, etc.
copper parts
cast iron materials
aluminum parts
bronze parts
Plus or minus tolerance can also be called as ______.
total tolerance
unilateral tolerance
bilateral tolerance
allowance
The total machinery weight plus the foundation weight should be well distributed in the corresponding soil area which is enough to cause a bearing stress within the safe bearing capacity of the soil with a factor of safety of ______.
4.5
3
4.2
5.0
______ is the plane perpendicular to the axial plane and to the pitch plane. In gears the parallel axes, and the plane of rotation coincide.
tangent plane
straight plane
transverse
reference
The conical surface at the starting end of the thread is called ____.
Pitch cone
chamfer
crest
flute
It is a good design practice for steel lineshafting to consider a limit to the linear deflection of _____ inch/foot length maximum.
0.050
0.010
0.020
0.060
The five principal parts of a shaper are the table, tool, slide, base, ram and ______.
column
vise
drive motor
apron
In designing gears for power transmission consider an efficiency of ______ as recommended.
96% or more
89% or more
85% or more
98% or more
Progressive change of position of a body is called:
acceleration
momentum
motion
force
The ideal thickness of the cutter at the pitch line for cutting helical gears should be _____ of the normal circular pitch.
3/8
¾
½
5/1
In drilling soft materials use cutting angle as low as 40 degrees but for extremely hard material up to ______ degrees is recommended.
80
55
75
70
The surface of the gear between the fillets of adjacent teeth is called____.
bottom land
flank
topland
flank of tooth
An act of cutting out a piece of metal at a desired shape and size:
broaching
blanking
slitting
dinking
A research agency handling assistance to all foundry, machine shop and metallurgical plant operation.
MIRDC
All of these
DOST
BOI
The soldering material commonly applied for automobile radiator cores and roofing seams.
15/85% tin and lead
50/50% tin and lead
45/55% tin and lead
20/80% tin and lead
A carbon content in the range of ____ in steel readily responds to heat treatment.
0.35 to 0.40%C
0.28 to 0.30%C
0.18 to 0.25%C
0.12 to 0.15%C
Web is part of a drill and is usually thicker:
beside the land
nearing the shank
close to the flute
at the tip portion
It is a symbol that the work surface should be machined-finished and usually indicated in the drawing and placed on the line that represents the surface to be machined.
f
15
20
FAQ
Safety features that must be placed and maintained at Machine, Blacksmith, Welding and foundry Shops.
walkway guide
all of these
safety notices in markers/boards
safety goggles
Deflection of a beam is:
proportional to the modulus of elasticity and moment of inertia
proportional to the load imposed and inversely to the length squared
inversely proportional to the modulus of elasticity and moment of inertia
inversely proportional to the weight-imposed times the length.
To teach professional subjects in mechanical engineering course, he must be a duly licensed _______ or a Master's degree or Doctorate degree holder in Mechanical Engineering.
ME and CPM
CPM
PME
ME
The amount by which the dedendum in a given gear/pinion exceeds the addendum of its mating pinion/gear. Also the radial distance between the top of a tooth and the bottom of the mating tooth space.
tip relief
top land
clearance
space
Axially located rectangular groove in a hub and shaft.
keyseat
cotter pin seat
flute
set screw point
_____ indicates how many times a volume of material is heavier than an equal volume of water.
specific gravity
specific volume
specific weight
specific density
Commonly used/produced screws/ bolts/nuts/ and for engineering applications is a series.
UNC
ANSI
withworth
UNF
Avoidance of vibration in equipment or machinery foundations, a mass of weight equal to ______ times the forces needed.
10 to 20
8 to 15
15 to 20
8 to 10
___________ is the name applied to reciprocating circular motion as that of a pendulum.
intermittent motion
reciprocating motion
momentum
oscillation
Nickel-chromium-molybdenum steel designation, SAE _____.
SAE51xx
SAE74xx
SAE49xx
SAE64xx
Moment of inertia is also called:
modulus of elasticity
weep strength
none of these
radius of gyration
It is hardening treating whereby a cast metal is being heated to a very high temperature then suddenly subjected to rapid cooling to improve hardenability or wear resistance is called:
annealing
normalizing
tempering
quenching
Surface connecting the crest and roots of the screw thread
lead angle
length of engagement
top land
flank
A good general-purpose deoxidizer and promotes fine grain in steel.
copper
magnesium
molybdenum
silicon
Treatment process that produces a residual compressive stress at the surface (which occupy more volume) and residual tension on the inside that results in considerable increase in fatigue strength for members on torsional/bending.
heavy oil quenching
partial quenching
quenching
shallow quenching
The flux that should be avoided in soldering electrical connection or commutator wires as it tends to corrode the connections.
sal ammoniac
zinc chloride
stearin
acid fluxes
The characteristic of tool steel to sustain shocks and major impacts is due to its:
toughness
stiffness
ductility
machinability
Bevel gears subjected to corrosion and lightly loaded are usually made of ____.
bronze
brass
all of these
duralumin
As a rule of thumb, the depth of foundation could be about 3.2 to ____ times the engine stroke.
4.20
4.0
3.40
3.80
The application of electrical current to the corrosion circuit to counter the corrosion reaction is called:
cathodic protection
sacrificial anodes method
chemical corrosion process
galvanic action
A major component of cast steel
silicon
iron
manganese
chromium
Normally cast iron contains 2% carbon or more and silicon in the range of ____%.
1–3
2 to 4
2–3
1 to 6
If a set of spur gears are made, installed and lubricated properly, they normally may be subjected to failures like:
tooth spalling
tooth pending
pitting
shearing
From experience specify the conventional limit of flywheel operations to be at 6000 ft/min for cast iron and ____ ft/min for cast steel.
7000
8000
10000
12000
What equation to use in computing the acceleration of the center of a rolling ball with a diameter of 8 inches.
0
rw2
w2/r
V2/r
In a cutting tool the cutting end can also be generally called ____.
end cutting edge
nose
back rake
side rake
What factors can modify the recommended cutting speed of known work piece?
rough cutting of work piece
modify the shape of the cutting tools
use correctly shaped cutting tools
depth of cut
The material for engine radiator is usually made of ______.
yellow brass
silicon brass
admiralty brass
navy brass
What type of leather belting should be used at an ambient temperature above 140° and possible acid liquid coming in contact with the belt?
mineral tanned
combination of oak
none of these
Oak tanned
A machine shop equipment that can flatten horizontally, vertically or angular plane.
shaper machine
welding machine
drill machine
power saw
A petroleum by-product used as electrodes in an electric arc furnace melting operation.
anthracite coke
foundry coke
graphite electrodes
bituminous coke
An example of rectilinear translation:
locomotive wheels
rack gear
piston of an engine
jack
________ does not affect the tensile strength of steel.
Sulphur
cobalt
phosphorous
baron
Which of the following is an unsafe condition in operating a lathe machine?
wearing denim pants/safety shoes
wearing a canvas apron
operating with safety gloves
wearing safety goggles/hearing aid
Relief angles of single-point cutting test in cutting mild steel, cast iron and other average work as recommended should be in the ranges of ____ degrees for high speed tools.
8 to 12
10 to 15
5 to 7
12 to 16
Tap not used for cutting threads ____.
tapping tap
bottoming tap
plugging tap
taper tip
Alloy steel axle under repeated load/stress will eventually fail if the load/stress is above the endurance for the steel under consideration. The endurance limit of the steel is therefore:
equal to the allowable stress at the module of elasticity
equal to half the ultimate strength
equal to the module of elasticity
equal to 80% of the elastic limit
All terms and abbreviations deal with wire rope arrangement except this ____ which deals with wire rope material strength.
preformed
IWRC
Mps
lang lay
Mirror finish has surfaces fineness of ____ rms.
1
2 to 8
1 to 3
2 to 5
Chromium steel (to include heat and corrosion resistant) designation.
SAE5xxx
SAE514xx
SAE61xx
SAE3xxx
Non-metallic material for high melting temperature being used as furnace lining.
quartz bricks
refractories
silica sand
dolomite clay bricks
For economical cost in the manufacturing large worm gears the following materials are usually applied.
bronze rim with cast steel spider
cast iron rim with bronze spider
cast steel rim with brass spider
alloyed aluminum rim with cast iron spider
In greater quantity, this element is harmful to the molten ferrous metal.
silicon
aluminum
oxides
sulfur
____ thread is used where the thread requires great strength and usually cut square on one side and slanting on the other side.
janno
buttress
square
double
Internal stress exerted by the fibers to resist the action of outside force is called ___.
shearing stress
tensile stress
ultimate stress
compressive stress
One of the following materials is not mentioned for wire rope pulley/sheave applications.
plastic
iron
paper
copper alloy
