大学MOOC Introduction to Mechanics(Zhejiang University)1458026173 最新慕课完整章节测试答案
The Dream of Flying
文章目录
Quiz 5
1、单选题：
Under certain conditions, two rows of vortices with opposite rotation direction and regular arrangement appear periodically on both sides of the back of the object, this is called .
选项：
A: Kárman vortex street
B: Prandtl vortex street
C: Tsien vortex street
D: Richardson vortex street
答案: 【 Kárman vortex street】
2、单选题：
Internationally, J-20 belongs to the generation warplanes.
选项：
A: 2nd
B: 3rd
C: 4th
D: 5th
答案: 【 5th】
3、单选题：
The fighter that has short and vertical takeoff and landing ability is .
选项：
A: J-20
B: F-35A
C: F-35B
D: F-35C
答案: 【 F-35B】
4、单选题：
The experimental facility Wright brothers used to design their plane was .
选项：
A: wind tunnel
B: water tunnel
C: computer
D: N-S equation
答案: 【 wind tunnel】
5、多选题：
The main forces that work on an aircraft include .
选项：
A: lift
B: gravity
C: thrust
D: resistance
答案: 【 lift;
gravity;
thrust;
resistance】
6、多选题：
The small wings located on the main wing include .
选项：
A: flaps
B: ailerons
C: spoilers
D: winglet
答案: 【 flaps;
ailerons;
spoilers;
winglet】
7、填空题：
A fluid that does not satisfy Newtonian viscosity law is fluid.
答案: 【 non-Newtonian##%_YZPRLFH_%##non-newtonian】
8、填空题：
paradox says that for incompressible and inviscid flows, the drag is zero on a body moving at a constant speed relative to the fluid.
答案: 【 d'Alembert】
9、填空题：
number is the criterion of laminar flow and turbulence.
答案: 【 Reynolds】
10、填空题：
The design of the winglet is to reduce the resistance on the wing.
答案: 【 induced】
The Footsteps of Industrilization
Quiz 6
1、单选题：
The scientist that deduced the formula of stability of rods is .
选项：
A: Euler
B: Newton
C: da Vinci
D: Hooke
答案: 【 Euler】
2、单选题：
Hard materials refer to the materials that have a high value of .
选项：
A: Young's modulus
B: Poisson's ratio
C: yield strength
D: ultimate strength
答案: 【 Young's modulus】
3、单选题：
In 1959, 's lecture of "There is plenty of room at the bottom" represents the beginning of nanotechnology.
选项：
A: Feynman
B: Einstein
C: Prandtl
D: Hsue-shen Tsien
答案: 【 Feynman】
4、单选题：
In strained silicon technology, the deformation type for silicon is .
选项：
A: tension
B: compression
C: bending
D: torsion
答案: 【 tension】
5、单选题：
The present foldable mobile phones usually use as their screen material.
选项：
A: OLED
B: LCD
C: glass
D: silicon
答案: 【 OLED】
6、单选题：
Rubber is a typical material.
选项：
A: soft
B: hard
C: brittle
D: plastic
答案: 【 soft】
7、多选题：
The basic assumptions in mechanics of materials include .
选项：
A: Continuity
B: Isotropy
C: Homogeneity
D: Small deformation and linear elastic range
答案: 【 Continuity;
Isotropy;
Homogeneity;
Small deformation and linear elastic range】
8、多选题：
At present, the companies that can produce large bypass ratio civil aviation engines are .
选项：
A: Rolls-Royce
B: GE
C: P&W
D: Boeing
答案: 【 Rolls-Royce;
GE;
P&W】
9、填空题：
The essence of internal force is the force between atoms.
答案: 【 electromagnetic】
10、填空题：
The two types of stress are normal stress and stress.
答案: 【