1. Which of the following is not expressed by primary design equation?
Answer
Correct Answer:
None of the above
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2. The limit equation st = Sut / Nf is expressed as _________
Answer
Correct Answer:
Rigid limit equation
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3. What does Ψ mean in Lagrange’s equation (LE = U λΨ)?
Answer
Correct Answer:
Functional constraints
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4. In reality, a device will have a ____
Answer
Correct Answer:
MA is less than SR
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5. In an ideal device, the ______________
Answer
Correct Answer:
MA is the same as the SR
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6. A pneumatic system is similar to what body system?
Answer
Correct Answer:
Respiratory
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7. In advantage a hydraulic system has over a system of levers, gears or pulleys is that they
Answer
Correct Answer:
Have fewer moving parts
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8. Gears that increase the speed of rotation in a device are called
Answer
Correct Answer:
Multiplying gears
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9. The function of a linkage in a bike is to
Answer
Correct Answer:
Transfer energy
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10. Hydraulic systems typically use the force of ________________ in a confined space.
Answer
Correct Answer:
Liquids
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11. Why can't machines be 100% efficient?
Answer
Correct Answer:
Friction
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12. What is 250 Pa in kPa
Answer
Correct Answer:
0.25
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13. What is the SR if the input distance is 60 m and the output is 45m
Answer
Correct Answer:
1.33 m
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14. What is the MA if a machine has an output force of 6 N and input of 3
Answer
Correct Answer:
2
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15. What is the efficiency of a machine if the MA is 10 and the SR is 20
Answer
Correct Answer:
50%
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16. T/F 80% efficient means that the machine has done a lot of work
Answer
Correct Answer:
True
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17. A simple machine is called simple because
Answer
Correct Answer:
It is made up of one basic machine
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18. Which of the following is there work done
Answer
Correct Answer:
Timeaka worked hard push a table that moved 3 meters
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19. The gear that has the force applied to it is called the
Answer
Correct Answer:
Driving gear
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20. The main purpose of a wheel and axle is to
Answer
Correct Answer:
Reduces the amount of friction when moving a load
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21. All are complex machines except
Answer
Correct Answer:
Crowbar
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22. In most machines when you decrease force you lose
Answer
Correct Answer:
Distance
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23. A wheel barrow is classified as what class level?
Answer
Correct Answer:
Class 2
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24. A group of parts that work together to perform a function
Answer
Correct Answer:
System
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25. Unit of measurement for pressure
Answer
Correct Answer:
Pascal
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26. Force of the small piston/area of the small piston = Force of the large piston/Area of the large piston
Answer
Correct Answer:
Formula for pressure in hydraulics
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27. Is the work needed to use - or operate the machine
Answer
Correct Answer:
Work input
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28. The relationship between the speed of rotations of a smaller gear and a larger gear - can be calculated by dividing the number of driver gear teeth by the number of follower gear teeth.
Answer
Correct Answer:
Speed ratio
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29. F/A
Answer
Correct Answer:
Formula for pressure
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30. When the driving and the driven gears are the same size
Answer
Correct Answer:
Parallel gear
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31. Is the work done by the machine
Answer
Correct Answer:
Work output
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32. 1st class - 2nd class - 3rd class
Answer
Correct Answer:
3 classes of levers
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33. Several simple machines all working together in a system
Answer
Correct Answer:
Complex machines
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34. Hydraulic system in your body
Answer
Correct Answer:
Circulatory system
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35. Used to apply force to the fluid - which creates pressure in the fluid
Answer
Correct Answer:
Input piston
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36. A pair of wheels that have teeth that interlink. When they rotate together - one gear wheel transfers turning motion and force to the other.
Answer
Correct Answer:
Gears
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37. The combustion occurs inside the engine. The pistons goes through 4 steps: Intake stroke (taking in the fuel) - compression stroke (compressing the fuel- air mixture) - power stroke (the fuel- air mixture is ignited) - exhaust stroke (waste products
Answer
Correct Answer:
Internal combustion engine
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38. Heated water to make steam and then used to move a piston in a circular motion
Answer
Correct Answer:
Steam turbine
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39. A combination of two wheels of different diameters that turn together - a lever that rotates in a circle around a center point or fulcrum.
Answer
Correct Answer:
Wheel and axle
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40. The comparison of the force produced by a machine to the force applied to the machine. (the size of the load vs the size of the force needed to move the load)
Answer
Correct Answer:
Mechanical advantage
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41. Which of the following tools is most suitable for very hard and brittle material?
Answer
Correct Answer:
Carbides
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42. What is the maximum allowed value of VB in mm for the HSS tool used with the cast iron workpiece for rough machining?
Answer
Correct Answer:
2
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43. Angle between side cutting edge and end cutting edge in the top surface plane of the tool.
Answer
Correct Answer:
Side cutting edge angle
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44. Which of the following has a greater impact on the longitudinal strength of reinforced composites?
Answer
Correct Answer:
Fiber strength
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45. In sandwich composites, which of the following material can be used for filling purposes?
Answer
Correct Answer:
All of them
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46. Which of the following is not a laminar composite?
Answer
Correct Answer:
Wood
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47. Which one of the following can act as a modifier in the glass-forming process?
Answer
Correct Answer:
Magnesium oxide
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48. For an M10 grade RCC (Reinforced Cement Concrete), the cement ratio to aggregate to the sand is?
Answer
Correct Answer:
1:3:6
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49. Which of the following is a secondary bond network of thermoplastics?
Answer
Correct Answer:
1-Dimensional
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50. Which of the following statements is/are false if separate cylinder liner is pressed inside the cylinder of large engines?
Answer
Correct Answer:
Cheap grade material cannot be used for jacket
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51. Which type of cylinder liners are used in engines having bore diameter more than 125 mm?
Answer
Correct Answer:
Wet liners
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52. Which of the following materials are used for cylinder liners?
Answer
Correct Answer:
Both a. and b.
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53. Thermal stress in cylinder liners can be reduced by _______
Answer
Correct Answer:
Increasing velocity of flowing water through jacket
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54. Which stress is induced in cylinder wall due to side thrust of the piston?
Answer
Correct Answer:
Bending stress
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55. Assignable causes are caused due to changes in _________
Answer
Correct Answer:
All of the above
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56. What is the relation between standard deviation(σ) and arithmetic mean (μ) to determine coefficient of variation (C)?
Answer
Correct Answer:
C = σ / μ
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57. Which of the following curves have the mean value equal to zero in the graph of frequency vs random variable?
Answer
Correct Answer:
Standard normal distribution curve
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58. What is the standard deviation of clearance population for the diameter of shaft and hole assembly specified below?
Answer
Correct Answer:
0.097 mm
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59. What is meant by hazard rate?
Answer
Correct Answer:
Both a. and b.
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60. What is the maximum percentage loss of economic cutting speed if geometric progression ratio = 1.06 ?
Answer
Correct Answer:
2.9 %
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61. What is the geometric progression ratio if maximum and minimum spindle speeds are 500 r.p.m and 300 r.p.m respectively? (Number of speed steps = 7)
Answer
Correct Answer:
1.08
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62. Economic cutting speed is minimum if geometric ratio is _________
Answer
Correct Answer:
Minimum
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63. Maximum and minimum diameter of a shaft to be machined is 100 mm and 80 mm respectively. What is the maximum spindle speed if cutting velocity is 40 m/min?
Answer
Correct Answer:
160 r.p.m.
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64. A machine tool has minimum speed of 100 r.p.m. How many speed steps are required by it to achieve speed of 200 rpm? (Geometric progression ratio = 1.06)
Answer
Correct Answer:
12
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65. An inclined belt conveyor is used for loading goods. If speed of the belt having 1500 mm width is 3 m/s then what is the volumetric capacity of the conveyor?
Answer
Correct Answer:
1.19 x 10-3 m3/s
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66. What is the mass capacity of flat belt conveyor if volumetric capacity 0.55 m3/hr? (ρ = 1500 kg/m3)
Answer
Correct Answer:
825 kg/hr
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67. Mass capacity of a conveyor is 200 ton/hr, if speed of the belt is 4 m/s then what is the width of horizontal flat belt conveyor carrying the load? (Surcharge factor = 0.075 & ρ = 1000 kg/m3)
Answer
Correct Answer:
533.7 mm
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68. Which discharge method provides only intermediate discharge for low speed flat belt conveyor?
Answer
Correct Answer:
Plow discharge
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69. Which of the following belt conveyors have low volume carrying capacity?
Answer
Correct Answer:
Flat belts
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70. A teetor- totter is an example of what class lever?
Answer
Correct Answer:
Class 1
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71. Simple machines were invented . . .
Answer
Correct Answer:
To make things easier
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72. Find the efficiency if a machine has an output force of 350N, input force of 130N, input distance 30 m, and output distance of 6 m.
Answer
Correct Answer:
58.4%
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73. Find the area of a piston if it has a diameter of 9.2 cm
Answer
Correct Answer:
66.44 cm2
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74. Find the force if a device has a pressure of 1400 Pa and an area of 3.5m2
Answer
Correct Answer:
4900 N
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75. Find the pressure in kPa if area is 0.0052m2 and a force of 85N
Answer
Correct Answer:
16.35 kPa
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76. What is the pressure if an input piston has an area of 20cm2 and a force of 85 N
Answer
Correct Answer:
4.25 N/cm2
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77. What is the mechanical advantage if a machine has an input force of 64N and an output force of 320N
Answer
Correct Answer:
5
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78. What is the speed ratio if machine has an output distance of 25 and an input distance of 40
Answer
Correct Answer:
1.6
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79. What is the efficiency of the machine if the input is 263 J and the output is 142 J?
Answer
Correct Answer:
54%
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80. What is the efficiency of a machine if 55.3 J of work are done on the machine, but only 14.3 J is produced by the 1machine?
Answer
Correct Answer:
26%
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81. Where is the fulcrum in a 3rd class lever
Answer
Correct Answer:
On the left side
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82. Where is the fulcrum in a 2nd class lever
Answer
Correct Answer:
On the right side
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83. He units for MA are called
Answer
Correct Answer:
MA is a ratio so it does not have units
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84. Name the class of lever.
Answer
Correct Answer:
Class 1
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85. What is the primary mechanical advantage of using the simple machine seen in the image?
Answer
Correct Answer:
You can apply a small force to penetrate something that normally requires a large force.
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86. How does a single fixed puled, like the one seen here, help you do work?
Answer
Correct Answer:
Changes the direction of the force
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87. Using a lever, Joe is able to lift a 10,000 N car off of the ground with a force of 1000 N. What is the mechanical advantage of the lever?
Answer
Correct Answer:
10
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88. A fishing pole is an example of a compound machine. What simple machines are used to make up this compound machine?
Answer
Correct Answer:
Lever, wheel and axle, pulley
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89. A lever is designed to:
Answer
Correct Answer:
Reduce the amount of force required to do work
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90. Are used to overcome the frictional force of the machine
Answer
Correct Answer:
Lubricants
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91. Act like levers
Answer
Correct Answer:
Bones
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92. Mass of the object lifted by the lever
Answer
Correct Answer:
Load
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93. F x d is ?
Answer
Correct Answer:
Formula for work
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94. To increase the force on the output piston - the input piston must move through a greater distance
Answer
Correct Answer:
Cost of MA
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95. Energy of motion
Answer
Correct Answer:
Kinetic energy
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96. Pneumatic system in your body
Answer
Correct Answer:
Respiratory system
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97. A measure of the amount of force applied to a given area
Answer
Correct Answer:
Pressure
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98. A very complex combination of pulleys - including fixed and movable is called
Answer
Correct Answer:
Block and tackle
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99. Reason that machines are never 100% efficient
Answer
Correct Answer:
Friction
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100. Work unit
Answer
Correct Answer:
Joule
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