1.

In a uniformly loaded simple beam, the maximum vertical shearing force

occurs
A. at the center C. at beam bottom fiber
B. at the section of maximum moment D. at either end support

2. The path of contact in involute gears where the force/power is actually

transmitted. It is a straight imaginary line passing through the pitch
point and tangent to the base circle.
A. principal reference plane C. front angle
B. pitch point D. line of action

3. What is the difference between a shaper and a planer?

A. the tool of the shaper moves while on the planer is stationary
B. the shaper can perform slotting operation while the planer cannot
C. the shaper handles large pieces while the planer handle only small
pieces
D. the tool of the shaper moves in reciprocating motion while the tool in
the planer moves in rotary motion

4. Brazing is more superior than soldering in joining metals because:

A. all of these
B. molten metal flaws between joints because of capillary forces
C. it has slight diffusion of metal involved
D. higher melting temperature joining

5. The purpose of______is to prevent gears from jamming together and making
contact on both sides of their teeth simultaneously
A. tooth fillet C. backlash
B. stress relieving D. all of these

6. Any internal/residual stress in a steel work can be remedied by:

A. tempering C. annealing
B. stress relieving D. all of these

7. The use of hardened steel for the mating metal gear appears to give the
best results and longer operational life. The usual hardness is in the
range of-
A. over 600 BHN C. below 350 BHN
B. 300 to 400 BHN D. over 400 BHN

8. _______is the product of the resultant of all forces acting on a body and
the time.
A. linear momentum C. angular momentum
B. linear impulse D. all of these

9. The separate forces which can be so combined are called

A. concurrent forces C. couple
B. non concurrent forces D. component forces
10. Continuous stretching under load even if the stress is less than the
yield point
A. plasticity C. creep
B. elasticity D. ductility

11. The most known lubricants being utilized in whatever category of load
and speed are oil, air, grease and dry lubricants like
A. bronze C. silicon
B. lead D. graphite

12. A coupling that allows axial flexibility/movement in the operation.

Made of alternate bolting of steel, leather, fabric and/or plastic
material into the two flanges
A. Flexible disk coupling C. flexing Oldham coupling
B. Flexible toroidal spring coupling D. Elastic-material bonded coupling

13. It consists of two cranks, a stationary piece called the line of

centers and the connecting rod is a
A. five-bar linkage C. three-crank linkage
B. four-crank braces D. four-bar linkage

14. Used to change rotary motion to reciprocating motion____________

A. rack gears C. Helical gears
B. hypoid gears D. herringbone gears

15. The effective face width of a helical gear divided by gear axial pitch
A. approach ratio C. Arc of recess
B. Arc of action D. Face overlap

16. Pitch diameter less the diameter of the roller chain is equal to:
A. top land C. addendum
B. bottom diameter D. Face overlap

17. Torsional deflection is a significant consideration in the design of

shaft and the limit should be in the range of_____________degree/foot of
length
A. 0.4 to 1 C. 0.08 to 1
B. 0.1 to 1 D. 0.6 to 1

18. The property that characterizes a material’s ability to be drawn into a

wire
A. tensile strength C. endurance limit
B. ductility D. thermal conductivity

19. Which of the phases of steel elements has a face-centered cubic

structure?
A. pyrite C. all of these
B. austenite D. cementite
20. Steel spring material is usually hardened to 400 to 500 BHN and the
carbon content is in the range of____
A. 0.50 to 0.90 % C. 0.45 to 0.48
B. all of these D. 0.96 to 0.97

21. Principal stresses occur on these plane

A. which are subjected to ultimate tension
B. which are subjected to maximum compression
C. The shearing stress is zero
D. which are 45  apart

22. The property of material wherein the content is continuously

distributed through its entire mass
A. plasticity C. homogeneity
B. malleability D. all of these

23. The properties of metal to withstand loads without breaking down is

A. elasticity C. plasticity
B. strength D. strain

24. 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 C. 5
B. 4 D. 51/2

25. Plain carbon steel standard designation SAE________

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

26. The rigidity of polymer can be increased by

A. furnace melting C. crystallization
B. normalizing D. shot opening

27. Recommended design practice for steel lineshafting to limit the linear
deflection to ________inch/foot of length (maximum)
A. 0.020 C. 0.012
B. 0.010 D. 0.15

28. For acceptable ideal range of tightness which may result from the
application of specific combination of allowances and tolerances.
A. allowance limit C. interference
B. tolerance limit D. Fit

29. The recommended center distance of sprockets should not be less than
_________ times the diameter of bigger sprocket
A. 1.75 C. 1 ½
B. 2 D. 2 ¼
30. The absolute viscosity of the fluid divided by its density expressed in
same term of units is also called_________
A. centistokes C. Petroffs equation
B. kinematic viscosity D. light petroleum oil

31. It is required that pipes bigger than ________mm. should not be screwed
but flanged
A. 76.2 C. 2 ¼ inch
B. 63.5 D. 68.5

32. Formed by the intersection of the adjacent flanks of adjacent threads

when extended is called.
A. crest apex C. sharp root
B. all of these D. sharp crest

33. In designing the spoke or wheel arm of a flywheel it is ideal to

consider that the cross-sectional area of the spoke at rim side should not
be less than ________of the cross area at the hub side
A. 80% C. 90%
B. 2/3 D. 3/8

34. The cutting up to 70% is best for drilling extremely hard metals and
for soft materials ______degrees may be applied
A. 60 C. 40
B. 45 D. 48

35. _________is the process necessary to reduce the brittleness in alloy

steel
A. martempering C. normalizing
B. carburizing D. tempering

36. Steel springs are made of high carbon steel heat treated and/or cold
worked to a high elastic limit to get good elastic deflection. In general
the carbon content is at _________.
A. 0.40% or more C. 0.5% or more
B. 0.65% or more D. 0.66% or more

37. In a chain drive design for large speed reduction it is preferable to

use a double reduction or compound type of transmission instead of single
two sprockets transmission. Drives should type be so designed that the
angle between two tight chain strand does not exceed_____degrees.
A. 45 C. 55
B. 60 D.90

38. The welded joints permit placing the added metal exactly where needed
and produce an integral structure which can develop_____% efficiency on
any thickness of section specially for mild steel materials
A. 95% C. 100%
B. 85% D. 90%

39. Forces not on the same plane are called

A. Component C. Non-coplanar
B. Resolution D. Composition of forces
40. The distance between the center of oscillation and the point of
suspension is called____
A. center of percussion C. radius of oscillation
B. center of gravity D. Fix axis

41. If the velocity is variable and regularly/constantly increasing the

rate of change is called____
A. Moment C. Constant work
B. Motion D. Acceleration

42. ______is a kinematic chain in which one link is considered fixed for
the purpose of analysis but motion is possible in other links
A. Sprocket chain C. Mechanism
B. Belting D. Frame

43. __________is one of the rigid members/bodies joined together to form a

kinematic chain
A. All of these C. Frame
B. Link D. Coplanar

44. The resultant of a pair of equal forces but opposite in direction is

called______
A. Non-concurrent C. Resultant
B. Concurrent D. Couple

45. The helical and herringbone gear teeth cut after heat treatment should
have a hardness in the range of 210/300 BHN. The pinion gear teeth
hardness, on the other hand ideally/normally should be at______BHN
A. 250/320 C. 400
B. 350/380 D. 340/350

46. As a rule the center to center distance between sprocket should not be
less than____ times the diameter of the bigger sprocket and not less than
30 times the pitch nor more than about 50 times to pitch
A. 2.5 C. 3
B. 2 D. 1.5

47. A single forces which produces the same effect upon a mass as two or
several forces acting together is called______
A. components C. composition of forces
B. resultant D. resolution of forces

48. A low coefficient of expansion, corrosion resistant weak in strength

and used for non-ferrous application as an alloying element
A. Aluminum C. copper
B. copper oxide D. aluminum oxide

49. For better mounting of bearing it is preferred to heat the inner ring
the range of 200  F and___ but never more than______  F as overheating might
reduce the ring hardness
A. 280 C. 300
B. 250 D. 320
50. For large speed ratio and large sprocket utilized it is recommended
cast_______ material since the large sprocket teeth are having fewer
engagement.
A. alloyed steel C. malleable iron
B. iron D. heat treated steel

51. Roller bearing is utilized on_______ carrying capacity and is

better than ball bearing in this condition
A. high temperature load C. low load
B. heavy load D. reversing load

52. To enhance mechanical properties, fabrication characteristic or any

other attributes of steel, some elements are added in melting in specific
ranges or minimum aside from carbon and generally termed____
A. Bessemer steel C. AISI steel
B. Alloy steel D. SAE steel

53. Materials having thermal expansion of about 10 times higher than those
of metals and has more heat generated during machining is____?
A. Aluminum C. Asbestos
B. Plastic D. PVC

54. To hold to minimum the axial direction of deflection/movement, a

separate thrust bearing or pre-loaded bearing capable of absorbing
considerable load is required. The type of bearing to use is a_____bearing
A. Double row angular contact C. Tapered roller bearing
B. Wide type self-aligning D. Deep groove ball

55. Pulley made of ______ordinarily is 45 to 55% less in weight and 2.35 to

2.70% less slippage compared with______pulley
A. wood/iron C. steel/iron
B. iron/steel D. wood/steel

56. To avoid scoring in the bearing surface and the shaft due to
contamination/absorption of the fine dirt in the bearing during
operation/lubrication, the bearing material to apply should have good
_____properties
A. corrosion resistance confermability C. embeddability
B. corrosion resistance D. anti-scoring

57. What do impact tests measure?

A. plasticity C. ductility
B. toughness D. compactness

58. The material that can cut/wear hardest substance subjected to:
A. carbide C. tungsten
B. abrasive D. vanadium

59. A ridge of uniform section in the form of a helix cut around the
circumference of a cylinder and advancing along the axis
A. thread roots C. screw threads
B. helix thread D. chamfers

60. Cast iron flywheels are commonly designed with factor of safety of
A. 10 to 13 C. 10 to 14
B. 10 to 12 D. 8 to 13
61. Class of material exhibiting decreased electrical conductivity with
increasing temperature
A. aluminum C. metals
B. p-type semiconductors D. n-type semiconductors

62. The welding made along the edges of two parallel plates is called
______
A. groove joint C. edge joint
B. fillet joint D. corner joint

63. Not part and in fact should not be used in the steel melting process
A. coke C. zinc
B. silicon D. aluminum

64. Length of contact between two mating parts in a screw and nut threads
measured axially is termed______.
A. Length of Engagement C. Arc of contacts
B. Axis of contact D. Depth of Engagement

65. The sum of their addendums and dedendums

A. whole depth C. width of space
B. full depth D. working depth

66. Method of finishing/shaping a machine part of exceptionally high carbon

or high chromium steel parts (orveryhard material)
A. using oxygen lanching C. using abrasive grinding
B. machining using carbine insert D. machining using high speed tool
steel

67. Alloy steel used in manufacturing bolts studs tubings subjected to

torsional stresses
A. AISI 3141 C. AISI4830
B. AISI 2330 D. AISI 4310

68. Which of the following is not a viscoelastic material?

A. Teflon C. all of these
B. plastic D. metal