M6 Flashcards

1
Q

The motion of a shaft in a circular hole is
an example of ___________ motion.
A. Completely constraint C. Incompletely constraint
B. Free D. Successful constraint

A

C

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2
Q

It is an age hardenable wrought alloy which
has mechanical properties comparable to those of heattreated alloy steel of the same order of hardness and
resistance to corrosion like that of Monel.
A. R Monel C. KR Monel
B. S Monel D. K Monel

A

D

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3
Q

Torsional deflection is a significant
consideration in the design of shaft and the limit should be
in the range of ___ ̲degrees/foot of length.
A. 0.005 to 0.008 C. 0.006 to 0.008
B. 0.08 to 1 D. 0.008 to 1

A

B

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4
Q

For a universal joint shaft angle should be
_______ degrees maximum and much less if in high
rotational speed.
A. 12 C. 15
B. 14 D. 16

A

C

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5
Q

It is of good design practice for steel line
shafting to consider a limit to the linear deflection of ______
inch/foot length maximum.
A. 0.01 C. 0.05
B. 0.02 D. 0.06

A

A

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6
Q

) A property of material which relates the lateral
strains to the longitudinal strain.
A. Deflection C . Poisson’s ratio
B. Elasticity D. Rigidity

A

C

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7
Q

The maximum stress to which a material can
be subjected without a trace of any permanent set
remaining upon a complete withdrawal of the stress.
A. Elastic limit C. Rupture stress
B. Proportional limit D. Ultimate stress

A

A

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8
Q

The ability of material or metal to resist being
crushed.
A. Bending strength C. Fatigue strength
B. Compressive strength D. Torsional strength

A

B

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9
Q

The U.S standard gage for iron and steel was
established in 1893 which is primarily a weight gage; the
basis is the weight of wrought iron which is at _____ lb/ft3
.
A. 480 C. 493
B. 490 D. 488

A

C

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10
Q

The total deformation measured in the
direction of the line of stress.
A. Axial deformation C. Strain
B. Elongation D. Unit stress

A

A

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11
Q

The maximum stress induced in a material
when subjected to alternating or repeated loading without
causing failure.
A. Elastic limit C. Proportional limit
B. Endurance limit D. Rupture strength

A

B

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12
Q

) The total resistance that a material offers to
an applied load.
A. Elasticity C. Rigidity
B. Flexure D. Stress

A

D

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13
Q

The ratio of stress produced by a suddenly
applied load to that produced by the same load gradually
applied.
A. 1 C. 4
B. 2 D. 8

A

B

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14
Q

In case of a circular shaft subjected to torque
alone, the value of shear stress is:
A. Maximum at the axis C. Uniform throughout
B. Maximum at the surface D. Zero at the axis

A

D

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15
Q

The first derivative of kinetic energy with
respect to velocity is:
A. Acceleration C. Power
B. Momentum D. None of these

A

B

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16
Q

Which of the following is the allowable stress
that is generally used in practice for main transmitting
shafts?
A. 8,500 psi C. 5,000 psi
B. 6,000 psi D. 4,000 psi

A

D

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17
Q

A type of shaft driven by a crank mechanism, consisting of a
series of cranks and crankpins to which the connecting rods
of an engine are attached.
A. Crankshaft C. Axle
B. Spindle D. Stub

A

A

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18
Q
  1. A separate shaft without its own bearings and rigidly coupled
    to the shaft of a machine.
    A. Crankshaft C. Axle
    B. Spindle D. Stub shaft
A

D

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19
Q

A rotating shaft with a fixture for holding a tool or a
workpiece.
A. crankshaft C. axle
B. spindle D. stub

A

B

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20
Q

A type of shaft which tapers in a series of steps rather than
one continuous narrowing.
A. Crankshaft C. Stepped shaft
B. Spindle D. Stub

A

C

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21
Q

A power-driven rotating shaft for power transmission.
A. line shaft C. counter shaft
B. intermediate shaft D. overhead

A

A

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22
Q

A shaft that runs parallel to the main shaft in a gearbox and
carries the pinion wheels.
A. line shaft C. counter shaft
B. intermediate shaft D. overhead

A

C

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23
Q

t is a camshaft used to operate inlet and outlet valves in the
combustion chamber of internal combustion engines.
A. line shaft C. counter shaft
B. intermediate shaft D. overhead shaft

A

D

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24
Q

A type of shaft placed in between line shaft and counter
shaft; it is generally used in gearboxes with two or more than
two stages.
A. Counter shaft C. Line shaft
B. Intermediate shaft D. Overhead shaft

A

B

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25
Q

A high carbon high copper chrome silicon cast steel is used
for making this type of machine element.
A. Camshaft C. Cylinder body
B. Cylinder head D. Piston

A

C

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26
Q

A stationary shaft carrying rotating wheels, pulleys, etc.
A. Axle C. Stepped shaft
B. Crank shaft D. Stub shaft

A

A

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27
Q

A central shaft for a rotating wheel or gear.
A. Crankshaft C. Axle
B. Spindle D. Stub

A

C

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28
Q

Which of the following is not included in transmission
shafting?
A. Axle C. Line shaft
B. Counter shaft D. Overhead shaft

A

A

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29
Q

Crankshafts are usually constructed by this method.
A.Casting C. Drop forging
B.Drawing D. Extrusion

A

C

30
Q

A crankshaft is a type of this shaft.
A. Machine C. Transmission
B. Machine frame D. None of these

A

A

31
Q

The crankshaft rotates the camshaft using this type of drive.
A. Belt drive C. Gear drive
B. Chain drive D. Motor drive

A

B

32
Q

A propeller shaft is a type of this shaft.
A. transmission C. machine
B. machine frame D. None of these

A

A

33
Q

. It is an unalloyed steel like AISI 1040 with good tensile
strength suitable for shafts, stressed pins, studs, keys etc.
A. Alloy steel C. Medium carbon steel
B. HSLA steel D. Tool steel

A

C

34
Q

The gears on camshaft and crankshaft are known by this
term.
A. Lining gears C. Aligning gears
B. Timing gears D. Tuning gears

A

B

35
Q

Stock lengths of transmission shafting include these EXCEPT:
A. 16 ft C. 24 ft
B. 20 ft D. 30 ft

A

D

36
Q

Stock lengths of transmission shafting include these EXCEPT:
A. 4 m C. 6 m
B. 5 m D. 7 m

A

A

37
Q

A steel specification used in automobile axles.
A. SAE 4130 C. SAE 4640
B. SAE 4340 D. SAE 8640

A

A

38
Q

A steel specification used in splined shafts.
A. SAE 4130 C. SAE 4640
B. SAE 4340 D. SAE 8640

A

C

39
Q

A steel specification used in crankshafts.
A. SAE 4130 C. SAE 4640
B. SAE 4340 D. SAE 8640

A

B

40
Q

A steel specification used in propeller axles.
A. SAE 2340 C. SAE 4340
B. SAE 3140 D. SAE 8640

A

D

41
Q

The most common grade of structural steel in U.S.A.
A. ASTM A36 C. ASTM A572
B. ASTM A656 D. CSA G40.21

A

A

42
Q

Shafts with keyways be designed on the basis of a solid
circular shaft using not more than ____ of the working stress
recommended for the solid shaft.
A. 65% C. 75%
B. 70% D. 80%

A

C

43
Q

A theory of failure generally accepted for the design of shafts
made from brittle materials.
A. Maximum-Normal-Stress Theory (Coulomb)
B. Maximum Distortion Energy Theory (Von Mises)
C. Maximum principal stress theory (Rankine)
D. Maximum Shear Stress Theory (Guest)

A

A

44
Q

It is a theory of failure generally accepted for the design of
shafts made from ductile materials.
A. Maximum Principal Strain Theory (St. Venant’s)
B. Maximum Distortion Energy Theory (Von Mises)
C. Maximum Principal Stress Theory (Rankine)
D. Maximum Shear Stress Theory (Guest/Tresca)

A

D

45
Q

. Distortion-energy theory (Von Mises Yield Criterion) states
that the yield strength in shear is ________.
A. 0.433 times the maximum shear stress
B. 0.5 times the maximum shear stress
C. 0.577 times the yield strength in tension
D. 0.6 times the yield strength in tension

A

C

46
Q

. Flexible shafts have _______ rigidity in torsion making them
flexible.
A. High C. Low
B. Infinitely small D. Very high

A

A

47
Q

Flexible shafts have ______ rigidity in bending moment.
A. High C. Low
B. Infinitely small D. Very high

A

A

48
Q

Shaft diameters designed based on torsional rigidity of shaft
deflection in ____ per foot of length.
A. 0.08° C. 0.18°
B. 0.12° D. 0.22°

A

A

49
Q

What is the unit of impact strength?
A. N/m C. kW
B. MPa D. N-m

A

B

50
Q

Shaft diameters designed based on torsional rigidity
_________ of shaft deflection.
A. 1 deg per 20D C. 3 deg per 20D
B. 2 deg per 20D D. 4 deg per 20D

A

A

51
Q

The maximum distance in feet between bearings, for average
conditions, in order to avoid excessive linear deflection, with
shafting subjected to no bending action of pulleys except its
own weight and the diameter is given in inches is ________.
A. 𝐿 = 3.95∛(D^2 )
C. 𝐿 = 8.95∛(D^2 )
B. 𝐿 = 4.95∛(D^2 )
D. 𝐿 = 9.95∛(D^2 )

A

C

52
Q

For uniformly distributed weight and round steel shafts, the
critical speed in rpm is ̲______ ̲̲̲ ̲ with D as diameter of
shaft in inches and L as the effective length of shaft in inches.
A. 𝑁 = 1,270,000𝐷/𝐿^2
C. 𝑁 = 6,270,000𝐷/𝐿^2
B. 𝑁 = 4,270,000𝐷/𝐿^2
D. 𝑁 = 9,270,000𝐷/𝐿^2

A

B

53
Q

What is the primary consideration for the determination of
the diameter of shaft?
A. Modulus of elasticity C. Stiffness
B. Toughness D. Rigidity

A

C

54
Q

The effect of the keyway cut into the shaft.
A. Reduces strength C. Reduces rigidity
B. Increases stress raiser D. All of these

A

D

55
Q

The angle of twist for a transmission shaft is inversely
proportional to the:
A. Diameter C. Square of the diameter
B. Cube of the diameter D. Fourth of the diameter

A

D

56
Q

Splined shafts are commonly used in ________.
A. Automobile gear box C. Hoist & crane gear box
B. Bicycle D. Machine tool gear box

A

A

57
Q

A metalworking process that occurs above the
recrystallization temperature of the material.
A. Cold drawing C. Hot rolling
B. Grinding D. Turning

A

C

58
Q

A metalworking process in which the material is drawn at
room temperature.
A. Cold drawing C. Hot rolling
B. Grinding D. Turning

A

A

59
Q

A machining process in which a cutting tool, typically a nonrotary tool bit, describes a helix toolpath by moving more or
less linearly while the workpiece rotates.
A. Cold drawing C. Hot rolling
B. Grinding D. Turning

A

D

60
Q

A type of abrasive machining process which uses a grinding
wheel as cutting tool.
A. Cold drawing C. Hot rolling
B. Grinding D. Turning

A

B

61
Q

In mill practice, the angle of twist is limited to 1 degree in a
length equal to _______ the shaft diameter.
A. 20 times C. 30 times
B. 25 times D. 40 times

A

A

62
Q

Which of the following lines is the most economical?
A. Gerber parabola C. Lagrange line
B. Goodman line D. Soderberg line

A

A

63
Q

Where is a splined shaft used?
A. When the power to be transmitted is high
B. When the speed is high
C. When the torque to be transmitted is high
D. When there is relative motion between shaft and hub

A

D

64
Q

According to the ASME code, maximum allowable shear
stress is taken as X% of yield strength or Y% of ultimate
strength.
A. X = 30 & Y = 18
C. X = 30 & Y = 30
B. X = 18 & Y = 18
D. X = 18 & Y = 30

A

A

65
Q

Flexible shafts have _______ rigidity in torsion making them
flexible.
A. High C. Low
B. Infinitely small D. Very high

A

A

66
Q

When two dissimilar shafts are connected together, then the
shaft is:
A. Combined shafts C. Differential shafts
B. Composite shafts D. Integrated shafts

A

B

67
Q

The tendency of brittle fracture increases with:
A. Decrease in strain rate C. Increase in strain rate
B. Decreasing temperature D. Increasing temperature

A

B

68
Q

Flexible shafts have ______ rigidity in bending moment.
A. Extremely low C. Low
B. High D. Very high

A

C

69
Q

For Diesel engine crankshafts, ______ is about the maximum
allowable vibratory stress (for continuous running).
A. 4,000 psi C. 5,000 psi
B. 4,500 psi D. 5,500 psi

A

B

70
Q

A fastener used to enable the transmission of torque from
the shaft to the shaft-supported element.
A. Keys C. Retainer rings
B. Pins D. None of these

A

A

71
Q

Which of the theory is related to brittle fracture?
A. Dirac hole theory C. Landau theory
B. Griffith’s theory D. Valence bond theory

A

B

72
Q

The graph for Griffith’s crack is:
A. A circle C. A straight line
B. A hyperbola D. An ellipse

A

D