MD 2 Flashcards
A correct cutting angle on a drill for ordinary work is:
a. 45⁰ b. 59⁰ c. 64⁰ d. 70⁰
59⁰
When using a drill press, the work should be hold with:
a. glove hand b. the hand c. a vise and a clamp d. pliers
a vise and a clamp
A machining operation whereby the tool reciprocates and the feed is stationary.
a. reaming b. shaping c. planning d. turning
shaping
A machining operation whereby the tool rotates and the feed is stationary.
a. shaping b. milling c. turning d. reaming
milling
A machine used in shaping metal by means of abrasive wheel or removal of metals with abrasive.
a. shaper b. planer c. grinder d. power saw
grinder
To prevent leakage in dynamic seals, it is recommended to used
a. gaskets b. seals c. packings d. felts
packings
The process of checking or producing checkers on the surface of the piece by rolling checkered depressions in the surface.
a. indexing b. soldering c. knurling d. quenching
knurling
Tooth width measured along the chord at the pitch circle.
a. chord space b. chordal thickness c. chord clearance d. chord length
chordal thickness
It is recommended for high speed application that the maximum number of teeth in small sprocket should be:
a. 10 to 20 b. 16 to 32 c. 14 to 28 d. 18 to 24
18 to 24
Cast iron flywheels are commonly designated with a factor of safety of:
a 8 to 10 b. 10 to 13 c. 5 to 6 d. 18 to 20
10 to 13
An agency handling assistance to all foundry, machine shop and metallurgical plant operation.
a. DOST b. BOI c. MIRDC d. UNICEF
MIRDC
A metal characteristic that absorbs extreme deformation without rupture is called:
a. hardness b. ductility c. plasticity d. toughness
plasticity
The size of all the pipes from 1/16 inches to 12 inches is defined by _____ size.
a. design b. external diameter c. inside diameter d. tubular
inside diameter
Cutting lubricants used in drilling, reaming and lapping of cast iron parts.
a. soda water b. kerosene c. soluble oil d. dry
dry
The angle developed between tooth profile and radial line at its pitch point is referred as:
a. approach angle b. pressure angle c. recess angle d. base helix angle
pressure angle
The purpose of annealing is to make a metal:
a. harder b. medium hard c. softer d. shiny
softer
AISI numbering for silicon steel.
a. 85XX b. 92XX c. 93XX d. 87XX
92XX
Specific weight of steel in lbs/inches3
a. 0.832 b. 0.328 c. 0.283 d. 0.823
0.283
Ratio of coil to wire diameter, a measure of coil curvature.
a. spring rate
b. spring index
c. Wahl’s factor
d. spring scale
spring index
When hole is smaller than the shaft, it will take pressure to pull the parts together, and the allowance is negative and is termed as:
a. negative fits b. negative allowance c. interference of metals d. negative allowance
interference of metals
A kind of thread that is generally used.
a. UNF b. UNEF c. UNC d. 8-Thread series
UNC
A machine tool used principally to machine flat or plane surfaces with a single point cutting tool.
a. shaper b. planer c. milling d. lathe
shaper
The ratio of relative viscosities colliding bodies after impact to their velocity before impact.
a. coefficient of friction b. coefficient of velocity c. coefficient of restitution d. coefficient of fluctuation
coefficient of restitution
In machine shop forging operation of lengthening a piece of stock while reducing the cross sectional area of work is called:
a. reducing b. upsetting c. upgrading d. de-sizing
upsetting
It is the radial distance between the top of the tooth and the bottoms of the mating tooth space.
a. clearance b. tolerance c. lead d. crest
clearance
An arc of the pitch circle through which a tooth travels from its contact to a mating tooth at the pitch point to the point where contact ceases.
a. arc of action b. arc of recess c. arc of approach d. backlash
arc of recess
The distance a helical gear would thread along its axis one revolution of it were free to move axially.
a. crest b. lead c. module d. clearance
lead
Ability of a material to absorb energy when deformed elastically and return to it when unloaded is:
a. toughness b. creep c. resilience d. plasticity
resilience
A weld made to hold the parts of a weldment in proper alignment until final welds are made.
a. fusion weld b. tack weld c. electric weld d. oxy-acetylene weld
tack weld
It is a machine used for testing of very thin steel or surface layers.
a. Charpy test b. Izod test c. Description test d. Rockwell test
Rockwell test
A machine tool in which an abrasive wheel is used as a cutting tool to obtain a very smooth finish.
a. Broaching machine b. Planer c. Tool grinder d. Lathe machine
Tool grinder
A machine tool used to produce a variety of surfaces by using a circular type cutter with multiple teeth
a. lathe machine b. milling machine c. broaching machine d. grinding machine
milling machine
A cutting tool used to finish internal and external surfaces by the use of a cutter called a broach, which has a series of cutting edges of teeth.
a. lathe machine b. broaching machine c. planer d. shaper
broaching machine
A kind of chuck, which should not be used where accuracy is required called
a. collet chuck b. magnetic chuck c. four jaw chuck d. universal chuck
universal chuck
A tool when pressed into a finished hole in a piece of work, provides center on which the place may be turned otherwise machined called
a. mesh b. butt c. mandrel d. wobble
mandrel
A machine tool which is very similar to a shaper except that the ram reciprocates vertically rather than horizontally.
a. lathe b. grinder c. planer d. slotter
slotter
A cylindrical bar of steel with threads formed around it and grooves or flutes running lengthwise in it, intersecting with threads to form cutting edges. It is used to cut internal threads.
a. Groove b. Lap c. Tap d. Flute
Tap
The operation of making a cone-shaped enlargement of the end of a hole, as for a recess for a flat head screw.
a. Counter sinking b. Knurling c. Squaring d. Performing
Counter sinking
It is an operation of sizing and finishing a hole by means of a cutting tool having several cutting edges.
a. Notching b. Piercing c. Turning d. Reaming
Reaming
The hop term used to include the marking or inscribing of center points circle area of straight lines upon metal surface either curve or flat, for the guidance of the worker called:
a. Shaping b. Hobbing c. Laying out d. Shaping
Laying out
It is used to true and align machine tools fixtures and works to test and inspect size trueness of finished work and compare measurements either heights or depths or many other measurements.
a. dial gage b. dial indicator c. tachometer d. speedometer
dial indicator
The process of forming metals by the use of dies after the metal is heated to its plastic range.
a. Rolling b. Forging c. Turning d. Casting
Rolling
A machine tool used to cut metals a lift, medium and large section using a reciprocating hacksaw blade.
a. Tool grinder b. Shaper c. Planer d. Power saw
Power saw
The usual value of helix angle of a drill is:
a. 30⁰ b. 60⁰ c. 110⁰ d. 120⁰
30⁰
Wiping is the process of:
a. applying flux during welding process b. cleaning the welded surface after the welding operation is over c. connecting load pipes by soldering alloy d. low temperature welding
connecting load pipes by soldering alloy
In Carthias process
a. molten metal is fed into the cavity in metallic mould by gravity
b. metal is poured into die cavity and after a predetermined time
the mould is inverted to permit a part of main steel in molten
state to flow out of cavity
c. cavity is filled with a precalculated quantity of metal and a
core or plunger is inserted to force the metal into cavity
d. metal is forced into mould under high pressure
cavity is filled with a precalculated quantity of metal and a core or plunger is inserted to force the metal into cavity
What is the purpose of riser?
a. Feed the casting at a rate consistent with the rate of solidification b. Act as a reservoir for molten metal c. Help feed the casting until oil solidification takes place d. Feed molten metal from pouring basin to gas
Help feed the casting until oil solidification takes place
The mould for casting ferrous materials
a. Copper b. High carbon steel c. Low carbon steel d. Medium carbon steel
Copper
A plug gage is used to measure
a. cylindrical bores b. screw thread c. spherical holes d. taper bores
cylindrical bores
When large number of components are turned and parted off a bar the chuck generally used is the _____.
a. collet chuck b. four jaw chuck c. magnetic chuck d. two jaw chuck
magnetic chuck
Which of the following is the cutting speed m of brass? a. 30m/min b. 40m/min c. 50m/min d. 60m/min
40m/min
Quick return mechanism is used in a
a. drilling machine b. grinder c. lathe d. shaper
shaper
Mandrel used to hold
a. cutting tool b. drill bits c. face plate d. hollow work pieces
hollow work pieces
In up cut milling, the work piece is fed
a. against the milling cutter b. at an angle of 60⁰ at the center c. at the right angle of the cutter d. the direction of the cutter
against the milling cutter
Sprue is passage provide for the
a. out flow b. in flow c. smooth flow d. solidification of molten material
in flow
Feed in the lathe machine is expressed in
a. mm b. mm per degree c. mm per revolution d. rpm
mm per revolution
Rapping allowance is provided on a pattern take care of
a. shrinkage b. machining c. distortion d. easy withdrawal
easy withdrawal
Chuck use in turret lathe is
a. collet chuck b. four jaw self centering chuck c. magnetic chuck d. three jaw chuck
three jaw chuck
Cape in foundry practice refers to
a. bottom half of molding box b. coating on the mold face c. middle portion of the mold d. top half molding box
top half molding box
A vent wire is use in
a. foundry b. hot forging c. cold forging d. fitting
hot forging
Angle plate is used for
a. cutting tapers in a lathe b. cutting gears in a shaper c. cutting gears in a milling d. fixing job out angle in a grinder
cutting gears in a shaper
Permeability, in relation to molding sands, is high for
a. coarse grain b. fine grains c. medium grains d. round grains
coarse grain
The purpose of tumbler gears in lathe is to
a. cut gears b. cut thread c. give desired direction of the movement to the lathe carriage d. reduce spindle speed
give desired direction of the movement to the lathe carriage
A sine bar cannot be used without a/an
a. angle gage b. micrometer c. slip gage d. vernier caliper
angle gage
The operation of finishing drilled hole to the correct size is known as
a. counter boring b. counter sinking c. reaming d. spot facing
reaming
When the outer corners of the cutting edges of a drill wear away to rapidly, it is an indication of?
a. not enough speed b. too much rake angle c. too much high speed d. B or C
too much rake angle or too much high speed
Carbon steel should be operated at
a. speed greater than that when using a high speed drill b. speed less than that when using a high speed drill c. the same speed as that using a high speed steel d. none of the above
speed less than that when using a high speed drill
Knurling is done to_____.
a. boring b. chamfering c. planning d. turning
chamfering
When material in a lathe, the harder the material being cut, the tool bit should have
a. less side rake b. more side rake c. more top rake d. no side rake
less side rake
After grinding the tool bit; the cutting edge should be
a. case hardened b. rubbed with emery cloth c. rubbed with crocus cloth d. stoned with oil stone
stoned with oil stone
hen cutting material in a lathe, the softer the material being cut, the tool bit should have
a. any of these b. double top rake c. less top rake d. more top rake
less top rake
A piece of cast iron hold against an emery wheel will give off
a. bright shiny sparks b. dull yellow sparks c. red sparks d. no sparks
dull yellow sparks
The alignment of coupling faces can checked by
a. inserting a feeler gage between coupling faces at various points around the circumference b. inserting thermometer c. rotating and measuring to nearest permanent fitting d. using an inside micrometer
inserting a feeler gage between coupling faces at various points around the circumference
A drill bit has
a. 1 flute b. 2 flutes c. 3 flutes d. 4 flutes
2 flutes
When using a drill press, the work should be held with
a. a pair of pulley b. a vise or clamp c. gloves on d. the hand
a vise or clamp
When a lathe is put into back gear, it will go
a. at a slower speed backwards b. at the same speed backward c. faster d. slower
slower
On a lathe, the dead center is used after
a. boring b. center-drilling c. drilling c. reaming
center-drilling
The best file to use when finishing sharp corner or a lots of grooves is the
a. jewelry file b. knife file c. mill file d. square file
knife file
Never use a file
a. that is dirty b. with a tang c. without a handle d. without oiling
with a tang
Which of the following information is necessary when ordering a file
a. size b. shape c. type of teeth d. all the above*
size, shape, type of teeth
When filling a piece of metal in a lathe if short quick strokes are used the finished piece will probably
a. be out of round b. be perfect c. have small flat areas on the surfaces d. A and C
be out of round, have small flat areas on the surfaces
The best procedure when filling a piece of metal in a lathe is to take ______
a. long fast stroke b. long slow stroke c. short even stroke d. short fast stroke
long slow stroke
Small piece of metal clogged between the teeth on a file are called
a. bumps b. clogs c. flats d. pins
pins
Finishing off a piece of metal with a real smooth finish can be done by
a. draw-filling
b. flat-filing
c. milling-filing
d. slide-filing
draw-filling
For finishing a piece of work to size the file to use is the
a. crossing file b. double-cut fine-tooth file c. mill file d. single-cut fine-tooth file
single-cut fine-tooth file
For filling lead or babbit, use a
a. lead float file b. mile file c. vixen file d. A and C*
lead float file, vixen file
A hacksaw blade with 32 TPI is best suited for cutting
a. small tubing b. conduit c. sheet metal under 18 gage d. any of the above
small tubing, conduit, sheet metal under 18 gage
A coolant is used when cutting a material in a power hacksaw to
a. absorb heat of friction b. prevent the blade from overheating c. prevent the blade from loose temper d. all of the above
absorb heat of friction, prevent the blade from overheating, prevent the blade from loose temper
A hacksaw blade with 10 teeth per inch is best suited for cutting
a. aluminum b. cast iron c. solid iron d. any of the above
aluminum, cast iron, solid iron
When cutting a long thin piece of metal
a. set the blade in the frame with the teeth facing toward you b. turn the blade at right angles to the frame c. turn the blade upside down in the frame d. use a blade with fewer teeth per inch
turn the blade at right angles to the frame
The hacksaw blade should be placed in the frame with
a. one end looser than the other end b. the teeth facing in any direction c. the teeth pointing backward d. the teeth facing forward
the teeth facing forward
A hacksaw blade with 34 teeth per inch should be used for cutting
a. brass b. cast iron c. heavy d. thin wall tubing
thin wall tubing
All hard hacksaw blade is best suited for work on
a. brass b. cast iron c. tool steel d. any of the above
brass, cast iron, tool steel
A hacksaw blade with 14 TPI is best suited for cutting
a. cold rolled steel b. hot rolled steel c. structural steel d. any of the above
cold rolled steel, hot rolled steel, structural steel
Files are divided into two general classes, namely
a. flat shapes and round shapes b. large and small c. rough and smooth d. single-cut and double-cut
single-cut and double-cut
hacksaw blade can be placed in a frame in
a. one position b. two positions c. three positions d. four positions
four positions
A hard hacksaw blade is one that
a. has a hard back and flexible teeth b. has a flexible back and hared teeth c. has the entire blade hardened d. will only fit a solid frame hacksaw
has the entire blade hardened
Hacksaw blade with 24 TPI is best suited for cutting
a. brass and copper b. sheet metal over 18 gages c. tubing d. any of the above
brass and copper, sheet metal over 18 gages, tubing
Hacksaw blades are made of
a. high speed b. tool steel c. tungsten alloy steel d. any of the above
high speed, tool steel, tungsten alloy steel
A flexible hacksaw blade is one that has
a. a movable blade b. flexible ends c. only the back hardened d. only the teeth hardened
only the teeth hardened
When lathe tool bit burns, it means that the
a. speed is too low b. speed is too fast c. material is too hard d. material cannot be done
speed is too fast
