WorksheetsREADINGS MD 2.1
Total questions: 95
Worksheet time: 48mins
______ is the theoretical profile of the thread for a length of one pitch in the axial plane on which the design forms of both the external threads are based.
basic form of thread
effective thread
basic profile of thread
design form of external thread
A tool not belonging to the group:
hermaphrodite caliper
divider
double VEE block
trammel
The maximum stress induced in a material when subjected to intermittent or repeated load without causing failure is called:
ultimate stress
endurance limit
ultimate torque
elastic limit
The factor of safety generally applied in wire rope design starts at 3-4 for standing rope application, 5-12 for operating rope and ______ for hazard to life and property application like foundry operation.
higher values
7-10
8-10
10-18
Silicon manganese steel designation, SAE_____.
72xx
40xx
92xx
9xx
The recommended age limit of fire tube boilers.
35 years
30 years
40 years
50 years
In machine shop, hand forging operation of lengthening a piece of stock while reducing the cross-sectional area of work is called:
bloating
upsetting
spreading
draining out
A watt is equivalent to:
42.4 Btu/min
1 N-m/sec
44.20 ft-lb/min
all of these
Which of the following services is not considered to be work of machinist?
reboring
grinding
overhauling
honing
Cold drawing is also called:
hard drawn
cold lap steel
strain hardening
oxidized steel
The top and bottom for gears is similar formed as to crest and _____ for screw thread.
flank
root
flank of tooth
top land
Intermediate gear is also called _____ gear in a gear train arrangement.
idler
pinion
third gear
mounted gear
The brittleness in steel at elevated temperature is _____.
hard drawn
cold lap
red shortness
residual stresses
Material may be stretched and still returns to its form or condition upon the release of force is called _____.
plasticity
modulus of elasticity
ductility
elastic limit
Type of chuck wherein the work piece with standard diameter or size could be attached fast and quick, especially small-size work of mass production.
lathe drive plate
clamp toe dog
collet attachment
steady center rest
Moment curve for a simple beam with a concentrated load at middle span takes the shape of a:
triangle
rectangular
trapezoid
semi-eclipse
This particular cutting tool material could withstand cutting temperatures of 1800°F and higher at cutting speed beyond those possible with other cutting tool materials.
titanium carbide
ceramic
carbide grade
cubic boron nitride
Common defects encountered in the foundry shop steel casting operating and also in welding practices.
cracks
cold shot
parting line
blow/pin holes
Some experiments made at Cornell University showed that experience mechanic could break a ____ bolt due to nut tightening.
3/8 inch
5/8 inch
1/2 inch
7/16 inch
The 3 most commonly used cam and follower system are radial and offset translating roller follower and ______ roller follower.
reversing
pulsating
swinging
actuating
Type of carbon and alloy used in production of precision work tools.
chrome-manganese
titanium
high speed
chrome-molybdenum
Recommended hardness of pinion for helical/herringbone gear tooth should be ___ BHN point to sustain life.
50 - 59
48 - 65
40 - 50
30 - 60
Fast process of analyzing all elements and chemical components of steel casting.
pyrometer
carbon analyzer
wet analyzer
spectrometer
In small quantity this alloy is effective for improvement strength at high temperature.
chromium
manganese
selenium
molybdenum
Which of the following is not a kind of mandrel?
expanded
extended
contraction
taper
The arc of action to circular pitch or length of action to base pitch.
approach ratio
contact ratio
arc of action
arc of approach
A cutting tool angle between the side cutting edge and the plane perpendicular to direction of feed travel is _____ angle.
side relief
side cutting edge
lead
side rake
The surface between the pitch circle and bottom land.
line of action
flank of tooth
bottom land
face of top land
A section in a machine shop operation.
core making
machining
fitting
pattern
Test showed that steel pulleys has less slippage than of cast iron pulleys in range of:
1.8 - 2.6
1.8 - 2.8
2.35 - 2.7
2.0 - 2.8
The bottom surface joining two sides of thread in screw.
pitch
crest
bottom land
root
Shear modulus is also:
shear elasticity
poison’s ratio
modulus of elasticity
modulus of rigidity
To prevent leakage in dynamic seal.
gaskets
seals
packings
felts
Top surface joining two sides of thread in screw.
pitch
top flank
top land
crest
The frictional forces depend on coefficient of friction and
torque
weights of object
normal force
moment
The number of cycles required to cause failure for given stream level.
endurance
fatigue
fatigue life
rupture
The tool bit made of tool blank consist of face, nose, shank and ______.
cutting edge
none of these
round nose
base
The cutting tool used the shaper are similar to turning tools of ____ machine.
planer
broaching
boring
lathe
The blades for hacksaw have number of teeth range of:
15 - 38 tooth/in
14 - 32 teeth/in
12 - 30 teeth/in
12 - 32 teeth/in
The safeguard in minimum of ______ mm in height for the use as toe guard/toe board.
165
135
150
120
Not part of the headstock.
back gear
spindle
anvil
motor
A lathe carriage part that bridge across the bed to carry the cross slide and tool rest.
automatic feed
apron
compound rest
saddle
Screw thread projecting from a cylindrical surface.
thread series
thread shear area
straight thread
taper thread
Vertex distance is a term used in ______ gearing.
spiral
worm
bevel
zerol
The modulus of elasticity of steel E is at 30×106 psi, iron at 10×106 psi, but concrete is much lower at ______ ×106 psi.
1
2
6
3
Two more forces acting together could be placed by a single force with same effect in a mass.
couple of force
resolution of forces
resultant
concurrent of forces
What is the recommended cutting speed range for bronze in fpm?
60/70
200/250
80/60
100/110
The resultant of two or more forces is also called:
equilibrium
momentum
concurrent forces
resolution of forces
Type of leather belt being applied with waterproof cement.
combination of oak/mineral tanned
all of these
oak tanned
mineral tanned
Cam in general may be divided into two classes: uniform motion cam and _____ motion cam.
reverse
gravity
decelerated
accelerated
For ordinary turning, drilling and milling on low strength steel the cutting fluid applied have soluble oil with consistency of 1-part oil to _____ parts water.
10 to 30
10
5 to 10
10 to 20
It is associated with nickel steel.
magnesium
lead
columbium
tin
Often called necking or grooving in the cutting of a groove next to a shoulder on a piece of work is called in a machine shop practice.
chamfering square
undercutting
corner
edge cutting
To prevent engine vibration to affect the surrounding area, it is a standard practice to isolate the engine and its foundation by at least _____ mm.
30 mm
20 mm
25 mm
36 mm
It is the drill backbone which run the entire length of the drill between plates and sides rigidity to the entire drill.
drill shaft
shank
tang
web
Grout material use under the machine bed and foundation surface should be:
1-part cement & 1/2-part green sand & 1/4-part of gypsum
1-part cement & 1-part green sand
1-part cement & 1-part screened sand & 1/4-part gypsum
1-part cement & 1 1/2-part screened sand & 1/2-part stone
The acceleration of the point of contact is:
rv2
rw2
v2/r
w2/v
The recommended lubricant for the chain drive operation.
SAE 4140
Petroleum oil
moly slip
heavy grease
In the SAE identification code of steel shafting, the 3rd and 4th digits represent the content of:
% of manganese in the steel
% of alloy elements
% of carbon contents
% of chromium in the steel
The minimum recommended worm pitch diameter is 1/4 in. and the maximum is _____ in.
1 3/4 in.
2 3/4 in
3 in.
2 in.
At a given section of an I beam the maximum bending stress occurs at the ______.
maximum shear stress area
neutral axis
web joint near the flange
outer most fiber
What is 25% of 1/2 ?
12 1/2
12.5
1/8
1/4
The process of increasing the carbon content to the surface of steel by exposing it to hot carbonaceous material above the transformation of 1650 to 1750 °F.
carbonitriding
casehardening
carburizing
induction hardening
What is the lightest known metal?
mercury
steel
chromium
aluminum
Designated pipe color used in electricity.
light blue
light orange
green
white
What is the value in degrees of 1 radian?
57.49∘
57.94∘
57.29∘
57.92∘
What is the equivalent value of 1083°C in °F?
1198
1981
1918
1891
The catwalk standard required for cleaning an engine can be found in any power plant or power generating unit.
24 in
22 in
23 in
25 in
It is ideal for maximum quietness in sprocket drive operation to choose ________ or more teeth.
25
26
27
28
Consider a maximum safe center distance of sprockets should be ______ pitches. Very long center distance caused catenary tension in the chain.
70
80
90
100
Extra flexible hoisting rope applications is ________.
6 × 17
6 × 37
6 × 9
6 × 21
Deals only with the motion of bodies without reference to the forces that cause them.
kinetics
motion
Kinematics
acceleration
Tooth width measurement along the chord at the pitch circle.
chord space
chord clearance
chordal thickness
chordal length
The rule of thumb in journal bearing design, the clearance ratio/clearance should be:
0.1001
0.0101
0.0110
0.0010
A shaft that is used to connect or disconnect at will is called ________.
clutch
bearing
brake shaft
lock shaft
It is recommended for high speed application that the minimum number of teeth in small sprocket should be ________.
12 to 20
18 to 24
16 to 32
14 to 28
Material having a high electrical resistance and should not be used as conductor of electrical current
magnesium
copper
nickel
iron
Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of degrees/foot of length.
0.004 to 0.006
0.08 to 1
0.006 to 0.008
0.008 to 1
The property that characterizes a material’s ability to be drawn into a wire.
plasticity
elasticity
ductility
utility
The distance from a point on a screw thread to a corresponding point on the next measured along the axis.
radial
module
thickness
pitch
Compute the cutting speed in fpm of a workpiece with 2 inches diameter and running at 100 rpm.
52
62
25
26
A body weighing 1000 lbs falls and strikes a 2000 lb/in spring. The deformation of the spring is.
2
4
3
5
To be responsible charge for the preparation of plans, designs, investigations, valuation, technical reports, specifications, project studies or estimates, he must be a.
ME
CPM
PME
CPM, ME & PME
In pure torsion, the maximum torsional stress occurs at the center of the
center
Long sides
medium sides
short sides
The modulus of elasticity for ordinary steel usually falls between ______ million pounds per square inch.
28 to 31
20 - 45
26 to 28
50 - 30
The modulus of elasticity is a measure of ______.
accuracy
quality
stiffness
rigidity
The modulus of elasticity for most metals in compression is usually taken as that in _____.
tension
bearing
torsion
yield
The ratio of Moment and stress.
strain
Contraction
proportional constant
section modulus
For a symmetrical cross-section beam, the flexural stress is _____ when the vertical shear is maximum.
infinity
maximum
zero
minimum
When tested in compression, ductile materials usually exhibit _____ characteristics up to the yield strength as they do when tested in tension.
the same
less than
more than
approximately the same
As one example, the ASME Code for riveted joints permits the design surface compressive stress to be about _____ higher than the design tensile stress.
50%
40%
60%
70%
In a pressure vessel, the ratio of minimum strength of joint to the strength of solid joint is known as
efficiency
Performance factor
joint efficiency
relative strength
In a pressure vessel, the usual factor of safety may be taken as
2
4
3
5
Is the permissible variation of the size of a dimension
tolerance
fits
limits
none of these
If there is no fit, a liberal tolerance of the order of _____ in machining work could be permitted.
±0.020
±0.010
±0.09
±0.05
