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MD ELEMENTS PER 50 > E3_51-100 > Flashcards

E3_51-100 Flashcards

1
Q
  1. Which of the following will usually happen to the blade of flexible hacksaw applied by too much pressure?

A. Snap easily
B. Buckle or run out of line
C. Cut too fast
D. Cut on a slant

A

B. Buckle or run out of line

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2
Q
  1. Which of the following best defines soldering?

A. It is holding two metals together by heating
B. It is joining two metals by third soft metal that is applied in a molten state
C. It is holding two different kinds of metals together by heating
D. It is joining two metals together by heating

A

B. It is joining two metals by third soft metal that is applied in a molten state

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3
Q
  1. What is the use of flux in soldering?

A. Keep the solder from running off the metal
B. Keep the metal from getting too hot
C. Keep the tip of the soldering iron clean
D. Remove and prevent oxidation of the metals

A

D. Remove and prevent oxidation of the metals

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4
Q
  1. A surface should be prepared for soldering by:

A. Filling the surfaces
B. Acid-cleaning the surface
C. Scraping the surfaces
D. Any of these

A

D. Any of these

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5
Q
  1. What is(are) the hand tool(s) used for cutting threads on round stock?

A. Stock and die
B. Stock
C. Die wrench
D. Stock cutter

A

A. Stock and die

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6
Q
  1. A tapered piece of stock is 2” long, 1-1/8” diameter at one end and ¾” diameter at the other end. The taper per foot is:

A. 2”
B. 2 – ¼”
C. 2 – ½”
D. 2 – 1/16”

A

B. 2 – ¼”

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7
Q
  1. Which of the following best defines sweating?

A. Soldering two different kinds of metal together
B. Separating two pieces two pieces of metal that have been soldered together
C. Thinning two surfaces, applying flux between them, holding the two together and heating
D. None of the above

A

C. Thinning two surfaces, applying flux between them, holding the two together and heating

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8
Q
  1. If muriatic acid is used as a flux, the soldered area must be cleaned thoroughly afterwards to prevent:

A. Anyone touching it from getting burned
B. Remaining acid from eating the metal
C. The acid from evaporating and the solder disintegrating
D. None of these

A

B. Remaining acid from eating the metal

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9
Q
  1. Solder will not unite with a metal; surface that has:

A. Grease on it
B. Oxidation on it
C. Dirt on it
D. Any of these

A

D. Any of these

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10
Q
  1. Prepared soldered paste flux is most popular but if you did not have any, you could use:

A. Hydrochloric acid
B. Nitric acid
C. Sulphuric acid
D. Any of these

A

A. Hydrochloric acid

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11
Q
  1. It serves as an excellent deoxidizing agent and promotes the nitriding of steels

A. Aluminum
B. Boron
C. Copper
D. Brass

A

A. Aluminum

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12
Q
  1. It is used to toughen and strengthen the steel, to reduce the grain size and to act as a cleanser and degasifier.

A. Nickel
B. Boron
C. Vanadium
D. Molybdenum

A

C. Vanadium

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13
Q
  1. Materials having a high percentage of alumina or steatite are known as

A. Titanium
B. Vanadium
C. Refractories
D. Ceramics

A

D. Ceramics

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14
Q
  1. It is a process of hardening the outer portion of the metal by prolonged heating free from contact with air while the metal is packed in carbon in the form of bone
    char, leather scraps, or charcoal.

A. Carburizing
B. Cyaniding
C. Nitriding
D. Aging

A

A. Carburizing

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15
Q
  1. The degree to which a material will deform before ultimate fracture.

A. Brittleness
B. Ductility
C. Malleability
D. Plasticity

A

B. Ductility

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16
Q
  1. The property of a material that indicates its ability to transfer heat.

A. Thermal conductivity
B. Electrical resistivity
C. Thermal expansion
D. Electrical conductivity

A

A. Thermal conductivity

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17
Q
  1. A group of heat treatable cast iron moderate to high strength, high modulus of elasticity, goal machinery and good resistance carbon.

A. Gray iron
B. Malleable iron
C. Ductile
D. White iron

A

B. Malleable iron

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18
Q
  1. Steels may be carburized and nitrided simultaneously by the process known as:

A. Nitrding
B. Carburizing
C. Carbonitriding
D. Cyaniding

A

C. Carbonitriding

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19
Q
  1. It is used in steels as an alloying element to combine hardness obtained.

A. Vanadium
B. Chromium
C. Titanium
D. Molybdenum

A

B. Chromium

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20
Q
  1. The art of making definite impressions in sand by means of a pattern for the purpose of producing a casting

A. Molding
B. Pattern
C. Extrusion
D. Die casting

A

A. Molding

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21
Q
  1. Hard solder is made of which of the following?

A. Copper and zinc
B. Tin and copper
C. Tin and zinc
D. Tin and lead

A

A. Copper and zinc

22
Q
  1. Which of the following is the flux usually used for hard solder?

A. Rosin
B. Barium
C. Borax
D. Alum

A

C. Borax

23
Q
  1. In which of the following where straight muriatic acid is often used as a flux?

A. Galvanized iron
B. Sheet metal
C. Cast iron
D. Any of these

A

D. Any of these

24
Q
  1. For aluminum, special solders are being used and will usually require which of the following?

A. More heat
B. The same heat as copper wire
C. Less heat
D. The same heat as sheet metal

A

A. More heat

25
Q
  1. Copper is annealed by heating to a cherry red color and ______.

A. Dousing in cold water
B. Dousing in oil
C. Cooling slowly in air
D. Dousing in hot water

A

C. Cooling slowly in air

26
Q
  1. Soft solder is made of which of the following?

A. Copper and zinc
B. Tin and copper
C. Tin and lead
D. Tin and zinc

A

C. Tin and lead

27
Q
  1. A piece of mild steel held against an emery wheel will give off _____.

A. Bright shiny sparks
B. No sparks
C. Light straw-colored sparks
D. Green sparks

A

C. Light straw-colored sparks

28
Q
  1. A gear wheel making 156 RPM has 56 teeth. It drives another gear at 91 RPM. The number of teeth on the second gear is:

A. 65
B. 50
C. 90
D. 96

A

D. 96

29
Q
  1. Tool steel can be hardened by which of the following?

A. Heating red hot and plunging into water
B. Heating red hot and cooling in a blast of dry air
C. Heating red hot and plunging into linseed or cottonseed oil
D. Any of these, depending on type and use

A

D. Any of these, depending on type and use

30
Q
  1. At what temperature where soft solder approximately melts?

A. 250 deg.
B. 450 deg.
C. 350 deg.
D. 550 deg.

A

C. 350 deg.

31
Q
  1. Products that have cross sections of less than 6 inches and that are not in the finished forms

A. Slabs
B. Gangue
C. Blooms
D. Billets

A

D. Billets

32
Q
  1. It is the process of forging by which the metal in the plastic state is made to flow within a die by the application of plunger pressure.

A. Extrusion forging
B. Smith forging
C. Drop forging
D. Press forging

A

A. Extrusion forging

33
Q
  1. It is a squeezing process used to finish sheet or bar stock for special purpose

A. Cold forging
B. Sizing
C. Cold rolling
D. Coining

A

C. Cold rolling

34
Q
  1. The term used for most press operations.

A. Glazing
B. Stamping
C. Coning
D. Swaging

A

B. Stamping

35
Q
  1. It is a process of shearing in which sheet or plate is cut out to a definite outline in a press.

A. Blanking
B. Stamping
C. Spinning
D. Trimming

A

A. Blanking

36
Q
  1. It is a special case of drawing in which the work is rotated and formed by means of a tool

A. Spinning
B. Embossing
C. Bulging
D. Stretching – forming

A

A. Spinning

37
Q
  1. It’s a squeezing operation used for flattening or surfacing various parts where a very small amount of flow of the material is involved.

A. Hobbing
B. Stamping
C. Coining
D. Sizing

A

D. Sizing

38
Q
  1. It is a process by which a hot plastic metal is made to flow into dies by the application of sudden blows to the material.

A. Drop forging
B. Press forging
C. Extrusion
D. Machine forging

A

A. Drop forging

39
Q
  1. It is a measure of stiffness.

A. Modulus of rigidity
B. Modulus of resilience
C. Modulus of elasticity
D. Modulus of toughness

A

C. Modulus of elasticity

40
Q
  1. It is a measure of the total energy-absorbed capacity of the material and includes the energy of both the elastic and plastic deformation.

A. Modulus of toughness
B. Modulus of resilience
C. Modulus of elasticity
D. Modulus of rigidity

A

A. Modulus of toughness

41
Q
  1. What material where a scriber made from?

A. Carbon steel
B. Tool steel
C. Cold-rolled steel
D. Hot-rolled steel

A

B. Tool steel

42
Q
  1. What should be done first before applying layout blue on a piece of metal?

A. Roughened
B. Clean
C. Hot
D. Cold

A

B. Clean

43
Q
  1. How many flutes does a drill bit have?

A. 4 flutes
B. 2 flutes
C. 3 flutes
D. No flutes

A

B. 2 flutes

44
Q
  1. Where is the correction position of the tool bit when facing off a piece of material in the lathe chuck?

A. Above center
B. Below center
C. At the center
D. Off center

A

C. At the center

45
Q
  1. Standard vise has _____ jaws?

A. Soft
B. Hard
C. Semi-hard
D. Semi-soft

A

B. Hard

46
Q
  1. In machining, which of the following could be the reason if tool bit burns?
    A. Speed is too slow
    B. Materials is too hard
    C. Speed is too fast
    D. Material cannot be cut
A

C. Speed is too fast

47
Q
  1. For which of the following where the lathe compound is used?

A. Angle cutting
B. Facing
C. Grooving
D. Any of these

A

D. Any of these

48
Q
  1. When the dial on the cross-feed is turned 0.010”, how much is removed from the diameter of the stock being cut?

A. 0.010”
B. 0.005”
C. 0.020”
D. 0.015”

A

A. 0.010”

49
Q
  1. Which of the following describes a flexible back hacksaw blade?

A. Only the teeth hardened
B. A movable back
C. Flexible ends
D. Only the back hardened

A

A. Only the teeth hardened

50
Q
  1. The flexible type hacksaw blade is best suited for which of the following materials?

A. Channel iron
B. Aluminum
C. Tubing
D. Any of these

A

D. Any of these

MD ELEMENTS PER 50 (10 decks)

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