大学MOOC 无损检测技术(英)（范文茹）(中国民航大学)1450428214 最新慕课完整章节测试答案
第二章 渗透检测
测试
1、单选题：
Which of the following is the least sensitive developer?
选项：
A: Dry powder
B: Aqueous soluble
C: Aqueous suspendable
D: Non-aqueous wet
答案: 【 Dry powder】
2、单选题：
Penetrants which have an emulsifier already in them referred to as?
选项：
A: Post emulsifiable
B: Solvent removable
C: Water washable
D: Lipophilic penetrant
答案: 【 Water washable】
3、单选题：
A good penetrant requires a surface tension which is?
选项：
A: High
B: Low
C: Fast
D: Slow
答案: 【 Low】
4、单选题：
Which penetrant method is considered to be the most sensitive?
选项：
A: Visible solvent removable
B: Fluorescent water washable
C: Visible post emulsifiable
D: Fluorescent post emulsifiable
答案: 【 Fluorescent post emulsifiable】
5、单选题：
Which of the following is a method of applying penetrant?
选项：
A: Spraying
B: Dipping
C: Brushing
D: All of the above are methods
答案: 【 All of the above are methods】
6、单选题：
The time which the penetrant is allowed to soak on the surface of a component is commonly referred to as the?
选项：
A: Development time
B: Emulsification time
C: Dwell time
D: Inspection time
答案: 【 Dwell time】
7、单选题：
What is the benefit of using visible dye penetrant over a fluorescent penetrant?
选项：
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、单选题：
Wettability of a liquid penetrant is controlled by which of the following factors?
选项：
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、单选题：
The contact angle for most commercial liquid penetrants has which of the values listed below?
选项：
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、单选题：
Magnetic particle inspection is a means for detecting discontinuities at or near the surface in_______materials?
选项：
A: Metallic
B: Nonconductive
C: Ceramic
D: Ferromagnetic
答案: 【 Ferromagnetic】
2、单选题：
The magnetic flux lines which flow through a bar magnet form clos