对应课程:点击查看
起止时间:2020-12-09到2021-09-01
更新状态:已完结
01 Introduction 01 Unit Detection of Introduction
1、 In training, the incorrect practice behavior is ( )
A:Do not do anything unrelated to the practice
B:You can go back and do your own thing at any time
C:Obey the arrangements and deployment of the instructor
D:Observe class disciplines, do not arbitrarily leave your post and visit others during work hours
答案: You can go back and do your own thing at any time
2、 When multiple people operate a machine tool, ( )
A:two people can operate the machine at the same time
B:only one person can operate at the same time
C: only one person can operate at the same time, and other students can leave the machine to rest
D: All of the above are correct
答案: only one person can operate at the same time
3、 The accuracy of the vernier calipers of 50 equally divided verniers is ( ) mm.
A: 0.05
B:0.02
C: 0.5
D:0.2
答案: 0.02
4、 The reading of the vernier caliper (there are 50 equal divisions on the vernier) is ( ) mm
A:9.52
B:10.52
C: 9.26
D:10.26
答案: 10.52
5、 Vernier calipers can be used as other tools.
A:正确
B:错误
答案: 错误
02 Casting 02 Unit Detection of Casting
1、 What molding method should be used to cast a single piece? ( )
A:Solid pattern molding
B:Parted pattern molding
C:Three-part molding
D:Loose piece molding
答案: Parted pattern molding
2、 Excessive moisture in the molding sand will bring about ( ) on castings.
A:blow hole
B:shrinkage cavity
C:sand hole
D:crack
答案: blow hole
3、 Pouring temperature is too high will bring about crack on castings.
A:正确
B:错误
答案: 正确
4、 When ramming the sand, in order to improve the efficiency, the molding sand can be added to the sand box at one time.
A:正确
B:错误
答案: 错误
5、 The gating system usually consists of a puring basin, a sprue, a runner and ingate.
A:正确
B:错误
答案: 正确
03 Milling 03 Unit Detection of Milling
1、 What types of fixtures are plane- jaw vise, indexing head, rotary table, and mandrel belong to?( )
A:General
B:Special
C:There are general fixtures and special ones
D:Mixture of general and special
答案: General
2、 When milling a rectangular workpiece, after milling the first side, you should first process ( ) in the usual order
A:vertical planes at both ends
B: corresponding parallel plane
C:vertical faces on both sides
D:one end face and its parallel face
答案: vertical faces on both sides
3、 Which milling machine accessory is needed for milling gears?( )
A:Plane jaw vise
B: Indexing head
C:Rotary table
D:Mandrel
答案: Indexing head
4、 Boring of small and medium-sized workpieces can be processed on both horizontal and vertical milling machines.
A:正确
B:错误
答案: 正确
5、 When milling with an end milling tool, the milling depth refers to the depth that the milling tool cuts into the metal layer perpendicular to the machined surface after each cutting.
A:正确
B:错误
答案: 正确
08 CNC Machining 08 Unit Detection of CNC Machining
1、 The meaning of “CNC” is ( ).
A: Numerical Control
B:Computer Numerical Control
C:Network Control
D:Internet of Things Control
答案: Computer Numerical Control
2、 The core component of CNC machine tools is ( ).
A: CNC system
B:Servo system
C:Auxiliary devices
D:Mechanical systems
答案: CNC system
3、 What is the G01 command? ( )
A:Clockwise arc interpolation
B: Linear interpolation
C:High-speed linear motion
D: Counterclockwise arc interpolation
答案: Linear interpolation
4、 Cutting the first part in programming is to ( )
A: Check the correctness of the part drawing design
B:Check the correctness of the part’s process plan
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