Elements 20

1. How do you call the time taken by vibrating body to complete one cycle?

A. Period

B. Angular frequency

C. Resonance

D. Damping

2. Past ME Board Question
What is the value of mechanical advantage for a four bar linkage in toggle position ?
A. Infinity
B.
1
C. 0
D. 1/2

3. Past ME Board Question
The flux that should be provided in soldering electrical connection or commutator wires as it tends to corrode the connections.
A. sal ammoniac
B. zinc chloride
C. stearin
D. acid fluxes

4. What is the maximum value of Notch Sensitivity factor?
A. 1
B. 1.2
C. 0.5
D. 0.25

5. Past ME Board Question
Of the following column formulas, which do you think is applicable to cast iron columns?

A. Euler's formula

B. Straight line formula

C. J.B.Johnson's formula

D. Secant formula

6. Which of the following hardness tests that predicts the tensile strength of mild steel specimen?
A. Rockwell
B. Vicker
C. Brinell
D. None of these

7. How do you call the difference between maximum distance of the lowest point of the follower from the axis of rotation of the cam and the least radius?
A. Lift
B. Dwell
C. Descent
D. Ascent

8.
Past ME Board Question
What theory in cyclic and impact loading which states that damage at any stress level is proportional to number of cycles?
A. Miner's Rule
B. Paris Law
C. Goodman Rule
D. Coffin-Manson Law

9. It is the inherent property of a body that offers reluctance to change its state at rest or in uniform motion.
A. Inertia
B. Mass
C. Weight
D. Friction

10. Past ME Board Question
Which of the following is the synergistic collection of machine elements? Synergistic because as a design it represents an idea or concept greater than the sum of the individual parts.
A. Collective science
B. Mechanical system
C. Design system
D. Statistical system

11. Past ME Board Question
Which of the following G code commands is for dwell or rest in CNC programming ?
A. G01
B. G02
C. GO3
D. G04

12. Which of the following is(are) the assumption(s) made in
Euler's column theory?
A. The column material obeys Hooke's law
B. The failure of column occurs due to buckling only
C. The length of the column is extremely bigger as compared to its cross sectional area
D. All of these

13. Past ME Board Question
Which of the following does not belong to the group?

A. Euler's formula

B. J. B. Johnson's equation

C. Lame's equation

D. Secant formula

14. Which column is Euler's formula applicable to?
A. Short columns
B. Strong columns
C. Long columns
D. Both short and long columns

15. Which of the following is CORRECT when a circular shaft is subjected to torsion only?
A. Constant shear stress occurs throughout the shaft.
B. Maximum shear stress occurs at the center of the shaft.
C. Very minimal shear stress is present throughout the shaft
D. Maximum shear stress occurs at the outermost fiber of the shaft.

16. Past ME Board Question
It is the combination of applied normal and shear stresses that produced maximum principal normal stress or minimum principal normal stress with a third principal stress between or equivalent to the extremes.
A. Principal shear stress
B. Maximum shear stress
C. Combined stresses
D. Principal normal stress

17. Past ME Board Question
Bifilar suspension is used to find

A. Moment of inertia of disc

B. Moment of inertia of bar

C. Weight of disc

D. Weight of bar

18. How do you call the CAM by which the follower reciprocates or oscillates in a plane parallel to that of its axis ?

A. Cylindrical cam

B. Reciprocating cam

C. Tangent cam

D. Circular cam

19. Past ME Board Question
How do you call the Grashof four-bar mechanism in which the shortest link is the frame or fixed link and the other two cranks completely rotate with their axes?
A. Drag-link mechanism
B. Crank-rocker mechanism
C. Double-rocker mechanism
D. Triple-rocker mechanism

20. How do you call the speed at which resonance will occur ?
A. Whipping speed
B. Critical speed
c. Whirling speed
D. All of these

21. Trifilar suspension is used to find
A. Moment of inertia of disc
B. Moment of inertia of bar
C. Weight of disc
D. Weight of bar

22. Past ME Board Question
How do you call the smallest circle drawn to the pitch curve from the center of rotation of the cam?
A. Base circle
B. Bottom circle
C. Pitch circle
D. Prime circle

23. Past ME Board Question
What is the other term for the Maximum-Shear-Stress Theory?
A. Von Mises criterion
B. Coulomb-Mohr theory
C. - Modified Mohr theory
D. Tresca yield criterion

24. How do you call the path generated by the trace pom as the follower is rotated about a stationary cam?
A. base circle
B. cam profile
C. pitch circle
D. pitch curve

25. Past ME Board Question
The statistical data used to identify the most likely failure mode is —
A. Finite element analysis
B. Fault tree analysis
C. Failure analysis
D. Stochastic analysis

26. Which of the following is the most preferred cam follower for smooth transfer of motion?
A. Flat face follower
B. Knife edge follower
C. Roller follower
D. Any of these

27. Past ME Board Question
A single ply leather belt running at a belt velocity of 300 ft/min is likely to transmit —-
per inch of width.
A. 2.5 Hp
В. 3.0 Нр
C. 4.0 Hp
D. 5.0 Hp

28. Past ME Board Question
What do you call the exact theoretical size to which limits or deviations is assigned and is the same for both members of the fit?
A. Nominal size
B. Basic size
C. Maximum size
D. Minimum size

29. In rotating horizontal shafts, when the shaft is rotating at a speed —-
of critical speed, then large vibrations
will occur,
A. one-half
B. one-third
C. one-fourth
D. three-fourth

30. If the radius of the base circle increases, what will happen to the pressure angle of the cam?
A. Increases
В. Decreases
C. Remains the same
D. None of these

31. Past ME Board Question
Which of the following M code commands is for a tool change in CNC programming,?
A. M04
В. M06
C. M08
D. M07

32. Which of the following is the theory used in the design of the shafts made of brittle materials?

A. Von Mises Theory

B. St. Venant's Theory

C. Rankine's Theory

D. Guest's theory

33. Past ME Board Question
What is the measure of the change of a material that is subjected to a change in temperature?
A. Toughness
B. Coefficient of thermal expansion
C. Thermal conductivity
D. Thermal diffusivity

34. In a 6 x 31 (IRC) wire rope, the number 6 indicates
А. Number of strands in the wire rope
B. Number of wires
C. Diameter of the wire rope in mm
D. Wire gage

35. Past ME Board Question
For a planar four-bar linkage, the sum of the shortest and longest lengths cannot be greater than the sum of the remaining two link lengths if there is to be a continuous relative rotation between two members.
A. Grubler's Law
B. Coriolli's Law
C. Grashof's Law
D. Cosine Law

36. Hooke's joint is used between —-automobiles.
of an
A. gear box and a differential
B. gear box and clutch
C. clutch and flywheel
D. transmission and differential

37. If the pitch of a screw is 2/9 ,what is the thread per inch?
A. 0.34
B. 5.4
C. 4.5
D. 17

38. Past ME Board Question
How do you call the radial distance from the top of a tooth to the bottom of another tooth of a gear?

A. clearance

B. addendum

C. dedendum

D. working depth

39. Past ME Board Question
For split pulley or pulley made of separate section bolted together at the rim, the maximum speed should be limited to about —-
% of the maximum
speed of solid pulley.
A. 65 to 75%
B. 45 to 50%
C. 55 to 60%
D. 80 to 90%

40. Past ME Board Question
In clock mechanism, which of the following is the gear train that is used to connect the minute hand to the hour hand ?
Answer:

A. Simple gear train

B. Differential gear

C. Sun and Planer gear
D. Reverted gear.train

41. Past ME Board Question
Which of the following is the most common work holding device of a shaper machine with the base graduated in degrees that make it possible to swivel any angle?
A. Shaper vise
B. Hold down bars
C. Tool head
D. Ram locking handle

42. Past ME Board Question
The power transmitted by the belt will depend on which of the following ?
A. The tension on the tight side of the belt
B. The radius of the driving pulley
C. The tension in the slack side
D. All of these

43. Past ME Board Question
Which of the following is the computational method used for solving complex shapes, such as those found in machinery replaces the complex shape with a set of simple elements interconnected at a finite set of a specific purpose ?

A.Finite element analysis
B.Numerical method of analysis
C.Fault tree analysis
D.Stochastic analysis

44. Which of the following is used to change the direction of an applied tensile force?
A. Gears
B. Flywheels
C. Pulleys
D. Ropes

45. For an evenly distributed and uniform wear on each meshing gear tooth, the ideal design practice is to consider a —
A. wear resistance alloy addition to tooth gears
B. heat treatment of the gears
C. hardening of each tooth
D. hunting tooth addition

46. How do you call the capacity of material to absorb energy upon loading even up to when it is deformed elastically?
А. Resilience
B. Toughness
C. Rigidity
D. Hardness

47. Which of the following is the drive to be used for a constant velocity ratio, positive drive with large center distance between the driver and the driven?
А. V-belt drive
В. Flat blet drive
C. Gear drive
D. Chain drive

48. It is the distance between similar equally-spaced tooth surfaces in a given direction and along a given line.
А. pitch circle
B. pitch
C. pitch plane
D. pitch diameter

49. The strain energy per unit volume required to stress a material from an unloaded state to the point of yielding is called

A. Bulk modulus
B. Modulus of elasticity
C. Modulus of rigidity
D. Modulus of resilience

50. Which of the following is the governor used to drive a gramophone?

A. Hartnell governor
B. Inertia governor
C. Watt governor
D. Pickering governor

51. Past ME Board Question
Which of the following is the mechanism the will produce intermittent rotary motion from continuous rotary motion?
A. Scotch yoke mechanism
B. Geneva mechanism
C. Elliptical mechanism
D. Whitworth mechanism

52. Past ME Board Question
The load that is applied transversely to longitudinal axis of member is called the
A. Live load
B. Concentrated load
C. Bending load
D. Distributed load

53. Past ME Board Question
Accident prevention is
A. an association of employers, organization & individuals
B. the foreman's responsibility just as much as production
C. the responsibility of top management
D. a job of a safety director

54. Which of the following affects most of the electrical and thermal properties of materials?
A. the atomic weight expressed in grams per gram-atom
B. the electrons, particularly the outermost ones
C. the magnitude of electrical charge of the protons
D. the weight of the atoms

55. Past ME Board Question
In the color coding of pipe, the color for a pipeline of air is —

A. light blue

B. light orange

C. white

D. green

56. Past ME Board Question
The set of specification for parts, materials, or processes intended to achieve uniformity, efficiency, and a specified quality is called

A. Code

B. Standard

C. Labelling

D. Marginalizing

57. Past ME Board Question
In the color coding of pipe, the color for a pipeline of water is
A. light blue
B. green
C. brown
D. silver grey

58. Past ME Board Question
In the color coding of pipe, the color for pipeline of steam is
A. light orange
B. white
C. silver grey
D. light blue

59. Past ME Board Question
It is also known as the study of lubrication, friction, and wear of moving or stationary parts?
A. Fluidity
B. Tribology
C. Hydrodynamics
D. Hydrology

60. Past ME Board Question
The color for a pipeline of electricity in the color coding of pipe is
A. light orange
B. white
C. silver grey
D. light blue

61. Past ME Board Question
What is the efficiency of self-locking machine?
A. more than 50%
B. less than 50%
C. equal to 50%
D. approaching 100%

62. Past ME Board Question
How do you call the phenomenon such that when a hot part is cooled suddenly by quenching, there is momentarily a high temperature gradient that induces a stress gradient and some metal parts under certain conditions crack as a result?
A. Thermal-shock failure
B. Thermal fatigue
C. Tempering
D. Quenching

63. What is the efficiency of reversible machine?
A. more than 50%
B. less than 50%
C. equal to 50%
D. approaching 100%

64. Past ME Board Question
What is the maximum efficiency of self-locking screw.
А. 75%
B. 45 %
C. 50%
D. 95%

65. Which of the following BEST describes a slider crank chain as a four bar linkage?
A. Two sliding pairs and two rotating pairs
B. Two sliding pairs and two turning pairs
C. One sliding pair and three turning pairs
D. One turning pair and three sliding

66. Past ME Board Question
In the color coding of pipe, the color for pipeline of communication is
A. light blue
B. white
C. brown
D. light orange

67. Past ME Board Question
Which of the following G-codes refers to rapid traverse in CNC machining?
A. GOO
B. G01
C. G02
D. G03

68. Corresponding piping color coding for alkaline is
A. Blue
B. Green
C. Red
D. Violet

69. Past ME Board Question
The color of pipe carrying fuel oil is
A. Light blue
B. Brown
C. White
D. Light orange

70. Past ME Board Question
If Vis the volume of metal in casting and A is its surface area, then the time of solidification will be proportional to
B. VNAA
C. V, 1/A?
D. V2, 1/AZ

71. Past ME Board Question
The set of specifications for the analysis, design, manufacture, and construction of something purpose of which is to achieve a specified degree of safety, efficiency, and performance or quality called
A. Code
B. Standard
C. Law
D. Theorem

72. Which of the following is an example of a higher pair?
A. Cam and follower
B. Ball bearings
C. Belt and Rope drives
D. All of these

73. Past ME Board Question
A cone formed by elements which are perpendicular to the elements of the pitch cone at the large end.
A. cone distance
B. back cone
C. root cone
D. cone center

74. Past ME Board Question
The principal raw materials used in steelmaking are iron ore, coal, and

A. Coke
B. Limestone
C. Slag
D. Phosphate

75. Past ME Board Question
An oil storage tank roof formed to approximately a spherical surface, supported only at its periphery.
A. self-supporting umbrella roof
B. self-supporting cone roof
C. self-supporting
D. supported cone roof

76. Past ME Board Question
Clearance to a new boiler installation to the existing or old plant building should follow a minimum clearance of —- between top of the boiler proper and the ceiling as stated in the Philippine Mechanical Code.
A. 2000 mm (max)
B. 1000 mm (max)
C. 2130 mm (max)
D. 2150 mm (Max)

77.Past ME Board Question
A petroleum by-product used as an electrodes in an electric arc furnace melting operation.
A. anthracite coke
B. foundry coke
C. graphite electrodes
D. bituminous coke

78. Past ME Board Question
A theory which states that a part subjected to any combination of loads will fail (by yielding or fracturing) whenever the maximum shear stress exceeds a critical value.

A. Distortion-energy theory

B. Maximum-shear-stress theory

C. Von Mises theory

D. Modified Mohr theory

79. Past ME Board Question
As a rule of thumb the depth of foundation could be about 3.2 to
times the engine stroke.
A. 4.20
В. 4.0
C. 3.40
D. 3.80

80. Past ME Board Question
Which of the following structural members are designed to support loads perpendicular to its longitudinal axis?
A. Girder
B. Beam
C. Truss
D. Column

81. Past ME Board Question
Avoidance of vibration in equipment. of machinery foundations, a mass of weight equal to the forces are needed.
times
A. 10 to 20
B. 8 to 15
C. 15 to 20
D. 8 to 10

82. Past ME Board Question
How do you call a design approach where no catastrophic loss can occur as a result of a component failure?
A. Fail-safe design approach
B. Fault-free analysis approach
C. Design-fault tolerance approach
D. Reliability approach

83. Past ME Board Question
The riveted joints in ASME Code has as design surface compressive stress —-
higher than the design
tensile stress.
A. 70 %
B. 60 %
C. 35 %
D. 50%

84. Past ME Board Question
What is the minimum length of contact in a tapped hole
for cast iron ?
A. 1.7. D
B. 1.5 D
C. 1.2 D
D. 2.1 D

85. Which of the following gasket material should avoid hot liquid/steam applications?

А. Asbestos fiber
B. Nylon fiber
C. Rubberized
D. Wool

86. A swinging support constructed as part of the vessel and that supports the manway cover when it is unbolted and moved aside.

A. Nozzles

B. Handholes

C. Davit

D. Orifice

87. Past ME Board Question
What do you call the level of stress that the part will be permitted to see under operating conditions?
A. Yield stress
B. Residual stress
C. Design stress
D. Ultimate stress

88. The relative strength of a butt welding could be safety
assumed as —
% efficiency.
A. 95
B. 90
C. 98
D. 92

89. Rule of thumb in calculating the equipment foundation. mass should be —-
times the weight of the machinery
it is supposed to support.
А. 3-5
В. 3-9
C. 3-6
D. 2-4

90. For stable equipment foundation the total combined engine driven equipment and foundation center of gravity must be kept below the foundation's too that
times the usual total combined
usually about —-
weight of the machinery it is supposed to support.
A. 3 to 4
B. 2 to 4
C. 3 to 7
D. 3 to 5

91. For non-metallic gaskets, it has been found that they should have a certain minimum amount of compression as —-
for a certain cork gasket.
А. 62%
B. 86 %
C. 68 %
D. 76%

92. What is the ratio of longitudinal stress to hoop stress for thin walled cylinders?
A. 1
B. 2
C. 1/2
D. 1/4

93. How do you call materials with the same elastic properties in all directions?
A. Isotropic materials
B. Ideal materials
C. Actual materials
D. Polytropic materials

94. Which of the following forms of rivet head is generally used for boiler plate riveting ?
A. countersunk
В. snap
C. conical
D. flat

95. What is the shear force diagram and the bending moment diagram for a cantilever beam having a concentrated load at the free end?

A. Triangle and parabola
B. Rectangle and triangle
C. Rectangle and parabola
D. Triangle and 3rd degree curve

96. Steering gear of an automobile is an example of
A. sliding pair
B. lower pair
C. higher pair
D. turning pair

97. A pressure vessel is considered to be thin, if the ratio of thickness to inside diameter is
A. less than or equal to 0.05
B. less than or equal to 0.025
C. less than or equal to 0.02
D. less than or equal to 0.01

98. Which of the following conditions for column where buckling load is maximum ?
A. Both ends of the column are fixed
B. One end of the column is fixed and the other is free
C. Both ends of the column are pinned
D. One end of the column is pinned and the other end is free.

99. How do you call a material that is capable of absorbing large amount of energy?
A. strong
B. tough
С. shock proof
D. ductile

100. Which of the following is the representation on the Mohr's circle for two mutually perpendicular principal stresses that are unequal but alike?
A. It is the diameter of Mohr's circle.
B. Itis one-third of the diameter of Mohr's circle.
C. It is one-fourth of the diameter of Mohr's circle.
D. It is the radius of the Mohr's circle.