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MD ELEMENTS PER 50 v2 > E7_1 > Flashcards

E7_1 Flashcards

1
Q
  1. Hardening the surface of iron – based alloys by heating then below the melting point in contact with a carbonaceous substance.

A. Carburizing
B. Normalizing
C. Mar tempering
D. Hardening

A

A. Carburizing

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2
Q
  1. A special metal formed when two or more metals are melted together.

A. Monel
B. Alloy
C. Solder
D. Hastalloy

A

B. Alloy

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3
Q
  1. The softening of metal by heat treatment and most commonly consist of heating the metal up to near motion state and then cooling it very slowly.

A. Annealing
B. Indexing
C. Knurling
D. Soldering

A

A. Annealing

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4
Q
  1. Substances having sufficient carbon and/or hydrogen for chemical oxidation to produce exothermally, worthwhile quantities of heat.

A. Lubrication
B. Graphite
C. Grease
D. Fuels

A

D. Fuels

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5
Q
  1. The principal material used in high production metal working tools.

A. Hyper – Eutectoid
B. High speed steel
C. Lead
D. High speed carbon

A

B. High speed steel

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6
Q
  1. Subjecting a substance to a high temperature below the fusion point usually to make it friable.

A. Calcination
B. Fusion
C. Boiling
D. Super heating

A

A. Calcination

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7
Q
  1. The operation of cooling a heated peace of work rapidly by dipping it n water, brine or oil.

A. Quenching
B. Annealing
C. Tempering
D. Normalizing

A

A. Quenching

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8
Q
  1. A metallic elements and only metal that is liquid at ordinary temperature.

A. Aluminum
B. Mercury
C. Zirconium
D. Zinc

A

B. Mercury

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9
Q
  1. A metallic element of copper – tin alloy.

A. Aluminum
B. Brass
C. Bronze
D. Chromium

A

C. Bronze

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10
Q
  1. An alloy of copper and zinc.

A. Aluminum
B. Brass
C. Bronze
D. Chromium

A

B. Brass

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11
Q
  1. Which of the following is the allowable tensile strength of the steel plates?

A. 396.41 N/m2
B. 379.31 N/m2
C. 296.12 N/m2
D. 310.11 N/m2

A

A. 396.41 N/m2

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12
Q
  1. Which of the following standard SAE designation of manganese steel?

A. 13xx
B. 11xx
C. 10xx
D. 8xx

A

A. 13xx

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13
Q
  1. Compute the torque received by the motor shaft running at 4250 rpm. Transmitting 11 Hp, through a 10 in diameter 200 involute gear. The shaft is supported by ball bearings at both ends and the gear is fixed at the middle of 8” shaft length.

A. 163 in. lb
B. 132 in. lb
C. 167 in. lb
D. 138 in. lb

A

A. 163 in. lb

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14
Q
  1. The SAE 2340 shafting contains how many percent nickel?

A. 3.85 Ni
B. 3.25 to 3.75% Ni
C. 4% Ni
D. 3.84% Ni

A

B. 3.25 to 3.75% Ni

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15
Q
  1. Which of the following standard SAE designation for chromium steel?

A. 92xx
B. 3xxx
C. 5xxx
D. 11xx

A

C. 5xxx

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16
Q
  1. In general, alloys with high nickel content retain toughness to quiet low temperatures up to how many degrees Fahrenheit?

A. – 380
B. – 260
C. – 400
D. – 320

A

D. – 320

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17
Q
  1. The length of the hub should not be made lesser than the face width of the gear. Hub lengths usually vary from 1.25D to 2D where D is the shaft diameter. What should be the reasonable diameter of steel hub?

A. 2D
B. 1.55D
C. 1.8D
D. 1.20D

A

C. 1.8D

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18
Q
  1. Torsional deflection is a significant consideration in the design of shaft and the limit should be in the range of how many degree/foot of length?

A. 0.4 to 1
B. 0.08 to 1
C. 0.01 to 1
D. 0.6 to 1

A

B. 0.08 to 1

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19
Q
  1. If the pitch of a screw is 2/9 find the thread per inch.

A. 0.34
B. 5.4
C. 4.5
D. 17

A

C. 4.5

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20
Q
  1. Steel spring material is usually hardened from 400 to 500 BHN and the carbon content is in the range of how many percent?

A. 0.50 to 0.90%
B. 0.45 to 0.48
C. 0.96 to 0.97
D. All of these

A

A. 0.50 to 0.90%

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21
Q
  1. Which of the following is not a classification of iron ore?

A. Hematite
B. Magnetite
C. Sulfurite
D. Siderite

A

C. Sulfurite

22
Q
  1. A soft yellow metal, known since ancient times as a precious metal which all materials values.

A. Solid’s
B. Bronze
C. Gold
D. Austenite

A

C. Gold

23
Q
  1. An amorphous solid may be fusing silica with a basic oxide.

A. Pearlite
B. Rock
C. Silicon
D. Glass

A

D. Glass

24
Q
  1. A fine grained salty silica rock used for sharpening edge tools

A. Eutectoid
B. Austenite
C. Oilstone
D. Pearlite

A

C. Oilstone

25
Q
  1. A highly transparent and exceedingly hard crystalline stone of almost pure carbon is called

A. Gold
B. Diamond
C. Bronze
D. Crystalline

A

B. Diamond

26
Q
  1. The common deoxidizer and cleanser of steel forming oxides and sulfates that are carried off in the slag.

A. Manganese
B. Carbon
C. Tungsten
D. Sulfur

A

A. Manganese

27
Q
  1. An alloy of copper, tin and small amount of phosphorous.

A. Chromium
B. Bronze
C. Brass
D. Aluminum

A

B. Bronze

28
Q
  1. The material used in high speed processes.

A. High speed
B. Chromium
C. Cast iron
D. Carbon steel

A

A. High speed

29
Q
  1. A material that can wear away a substance softer than itself is called.

A. Abrasive
B. Corrosive
C. Tungsten
D. Alloy

A

A. Abrasive

30
Q
  1. The process of heating a piece of steel to a temperature within or above critical range and cooling rapidly.

A. Normalizing
B. Hardening
C. Annealing
D. Tempering

A

B. Hardening

31
Q
  1. Shafts readily available in the market are made in many ways and wide variety of material composition. It is likely be cold drawn carbon steel in size smaller than _____ inches diameter.

A. 3.75
B. 5
C. 4
D. 51/2

A

A. 3.75

32
Q
  1. Plain carbon steel standard designation SAE _____.

A. 6xxx
B. 10xx
C. 13xx
D. 2xxx

A

B. 10xx

33
Q
  1. If the inertia is 90 lb. ft2 and the speed of the driven shaft is to be increased from 0 to 2500 rpm in 5 seconds, shaft material is of SAE 4140 with yield strength of 110000 lbs./in.2, find the clutch starting torque in in. – lb ft.

A. 159
B. 146
C. 128
D. 191

A

B. 146

34
Q
  1. Which of the following cannot be used in drilling machine?

A. Reaming
B. Lapping
C. Spot facing
D. Broaching

A

C. Spot facing

35
Q
  1. A kilowatt is equal to:

A. 8851.2 in. – lb/sec
B. 57 BTU/min.
C. 1140 joule/sec.
D. 44.200 ft. – lb./min.

A

B. 57 BTU/min.

36
Q
  1. Molybdenum-chromium-nickel steel designation.

A. SAE 48xx
B. SAE 56xx
C. SAE 43xx
D. SAE 46xx

A

C. SAE 43xx

37
Q
  1. Single forces which produces the same effect upon a mass replacing two or more forces acting together is called:

A. Vector
B. Component of forces
C. Resultant
D. Resolution

A

C. Resultant

38
Q
  1. Permissible variation of the manufactured/machined dimension is called:

A. Intolerance fits
B. Allowance
C. Deviation
D. Tolerance

A

D. Tolerance

39
Q
  1. Peculiar strength of the metal to resist being crushed.

A. Shear strength
B. Compressive strength
C. Ultimate strength
D. Elastic limit

A

B. Compressive strength

40
Q
  1. The process of checking or producing checkers on the surface of a piece by rolling checkered depression into the surface is called.

A. Knurling
B. Hemming
C. Breading
D. Embossing

A

A. Knurling

41
Q
  1. A material used in softening a piece of metal that is too hard to machine and is done by heating steel slowly above the usual hardening temperature keeping it at the heat for ½ to 2 hours then cooling slowly, preferably in a furnace.

A. Broaching
B. Quenching
C. Normalizing
D. Annealing

A

D. Annealing

42
Q
  1. A manganese steel containing approximately 0.20% carbon.

A. SAE 1320
B. SAE 1230
C. SAE 2340
D. SAE 4230

A

A. SAE 1320

43
Q
  1. How many 5/16 inch holes can be punch in one motion in a steel plate made of SAE 1010 steel 7/16 inch thick using a force of 55 tons. The ultimate strength for shear is 50 ksi and use 2 factor of safety.

A. 5.8
B. 5
C. 3.7
D. 6.5

A

B. 5

44
Q
  1. Heating to some 1000F above the transformation range with subsequent cooling to below that range in still air at room temperature to produce uniform structure of
    metal is termed as.

A. Annealing
B. Hardening
C. Normalizing
D. Tempering

A

C. Normalizing

45
Q
  1. Heating to a sub-critical temperature about 1,100oF to 1300oF and holding at that temperature for a suitable time for the purpose of reducing internal residual stresses is called

A. Annealing
B. Hardening
C. Tempering
D. Stress relieving

A

D. Stress relieving

46
Q
  1. Reheating to a temperature below the transformation range, followed by any desired rate of cooling to attain the desired properties of the metal.

A. Annealing
B. Hardening
C. Tempering
D. Stress relieving

A

C. Tempering

47
Q
  1. The effect of alloying zinc to copper is

A. To increase hardness
B. To increase strength and ductility if added up to 10 – 30%
C. To impart free-machining properties
D. To improve hardness and strength

A

B. To increase strength and ductility if added up to 10 – 30%

48
Q
  1. Polyesters belong to the group of:

A. Phenolics
B. Thermoplastic plastics
C. Thermo setting plastics
D. All of these

A

C. Thermo setting plastics

49
Q
  1. The imperfection in the crystal structure of metal is known as:

A. Dislocation
B. Fracture
C. Impurity
D. Slip

A

A. Dislocation

50
Q
  1. The most important element that controls the physical properties of steel is:

A. Carbon
B. Chromium
C. Silicon
D. Tungsten

A

A. Carbon

MD ELEMENTS PER 50 v2 (10 decks)

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