第六章测试1.
What does LH mean in thread marks?
A:the length of thread B:left hand thread C:uncertain D:right hand thread
答案:B
2.
what does M, Tr, R mean respectively in thread marks?
A:metric thread, trapezoidal thread, sealing pipe thread B:metric thread, trapezodial thread, sealing pipe thread C:trapezoidal thread, ,metric thread,sealing pipe thread D: trapezoidal thread, sealing pipe thread,metric thread 3.
what does the 6 mean in symbol of washer GB/T 97.1-2002 6
A:major diameter of the washer B:nominal diameter of the washer C:minor diameter of the washer D:the length of the washer 4.
What is the diameter relationship between hole and bolt?
A:the hole diameter should be equal to bolt diameter B:the hole diameter should be larger than bolt diameter C:the hole diameter should be 1.1times of bolt diameter D:the hole diameter should be less than bolt diameter 5.
Whe two adjacent part are cut, the hatching direction shall be reverese.
A:对 B:错 6.
In screw joint, the end line should be drawn at the position of
A:same level with contacting surface B:any position C:under contacting surface D:above the contacting surface 7.
In stud joint, the length ,Bm of metal end depends on material connected.
A:Bm=d, for steel B:Bm=1.25d or 1.5d for cast iron C:Bm=0.5d for steel D:Bm=2d for aluminum 8.
The addendum circle is larger than pitch circle, and the dedendum circle is the smallest one
A:对 B:错 9.
Keyway inside a wheel is normally through
A:对 B:错 10.
In the symbol of key 16X100 GB/T 1096-2003, what does 100 mean?
A:length of the key B:width of the key C:height of the key D:number of the key 11.
Select the correct thread connection drawing method
A:d B:b C:c D:a 12.
When draw internal thread, major diameter is drawn as thin line , minor one is drawn as thick line in non circular view.
A:对 B:错 13.
In circular view, the notch of screw head should be drawn with an inclind angle of ( )
A:45° B:60° C:120° D:90°
