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起止时间:2020-02-18到2020-07-15
更新状态:已完结
第二章 渗透检测 测试
1、 Which of the following is the least sensitive developer?
A:Dry powder
B:Aqueous soluble
C:Aqueous suspendable
D:Non-aqueous wet
答案: Dry powder
2、 Penetrants which have an emulsifier already in them referred to as?
A:Post emulsifiable
B:Solvent removable
C:Water washable
D:Lipophilic penetrant
答案: Water washable
3、 A good penetrant requires a surface tension which is?
A:High
B:Low
C:Fast
D:Slow
答案: Low
4、 Which penetrant method is considered to be the most sensitive?
A:Visible solvent removable
B:Fluorescent water washable
C:Visible post emulsifiable
D:Fluorescent post emulsifiable
答案: Fluorescent post emulsifiable
5、 Which of the following is a method of applying penetrant?
A:Spraying
B:Dipping
C:Brushing
D:All of the above are methods
答案: All of the above are methods
6、 The time which the penetrant is allowed to soak on the surface of a component is commonly referred to as the?
A:Development time
B:Emulsification time
C:Dwell time
D:Inspection time
答案: Dwell time
7、 What is the benefit of using visible dye penetrant over a fluorescent penetrant?
A:Easier to remove the excess background
B:Greater sensitivity is obtained
C:No special lighting is required
D:All the above are benefits
答案: No special lighting is required
8、 Wettability of a liquid penetrant is controlled by which of the following factors?
A:Cosine of the contact angle
B:Viscosity
C:Surface tension
D:Both cosine of the contact angle and surface tension
答案: Both cosine of the contact angle and surface tension
9、 The contact angle for most commercial liquid penetrants has which of the values listed below?
A:Less than 5 degrees
B:Less than 10 degrees
C:Only needs to be less than 89 degrees
D:Only needs to be less than 89 degrees
答案: Less than 5 degrees
第三章 磁粉检测 第三章测试
1、 Magnetic particle inspection is a means for detecting discontinuities at or near the surface in_materials?
A:Metallic
B:Nonconductive
C:Ceramic
D:Ferromagnetic
答案: Ferromagnetic
2、 The magnetic flux lines which flow through a bar magnet form closed loops but can be broken by which of the following?
A:A change in permeability
B:A non metallic inclusion
C:A crack
D:None of the above will cause a break in a flux line
答案: None of the above will cause a break in a flux line
3、 A fault in magnetised material will best be detected when it lies in which of the following directions?
A:Parallel to the magnetic field
B:Perpendicular to the magnetising force
C:Parrallel to the magnetising current
D:Both perpendicular to the magnetic field and parrallel to the magnetising current
答案: Both perpendicular to the magnetic field and parrallel to the magnetising current
4、 Non metallic inclusions can also be found with magnetic particle inspection as well as cracks. This is due to a change in what property of the inclusion in relation to the parent materials?
A:Conductivity
B:Flux leakage
C:Hysteresis
D:Permeability
答案: Permeability
5、 Flow detection is best achieved when the magnetic flux is?
A:Parallel to the flaw major dimension
B:At 30 degrees to the flaw major dimension
C:At 90 degrees to the flaw major dimension
D:At 60 degrees to the flaw major detection
答案: At 90 degrees to the flaw major dimension
6、 Magnetic field strength in a long coil is determined by?
A:Applied current strength
B:Number of turns in the coil
C:Coil diameter
D:Applied current strength and number of turns in the coil
E:All of the above
答案: Applied current strength and number of turns in the coil
7、 How may a ferromagnetic material be demagnetised?
A:Using an AC Coil
B:Heating above the curie temperature
C:Reversing DC Coils
D:All the above
答案: All the above
8、 A residual magnetic field is always?
A:Stronger than the magnetic field producing it
B:Weaker than the magnetisiing field producing it
C:Equal to the magnetising field producing it
D:None of the above
答案: Weaker than the magnetisiing field producing it
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