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Midterm Scams
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Preguntas del test (17)
1The R chart is used for which one of the following product or part characteristics:
- A(a) number of rejects in the sample
- B(b) number of reworked parts in a sample
- C(c) radius of a cylindrical part
- D(d) range of sample values?
2[Midterm]The ability of a positioning system to return to a previously defined location is measured by which one of the following terms:
- A(a) accuracy
- B(b) control resolution
- C(c) repeatability
3 What is the typical length to diameter ratio for end mills?
- A(a) 6:1
- B, (b) 3:1
- C(c) 2:1
- D(d) 1:1.
4Which cutting speed is always lower for a given machining operation: or
- A(a) cutting speed for maximum production rate
- B(b) cutting speed for minimum cost
5[Midterm] A roughing operation generally involves which one of the following combinations of cutting conditions?
(where v = cutting speed, f = feed, and d = depth of cut)- A(a) high v, f, and d
- B(b) high v, low f and d
- C(c) low v, high f and d
- D(d) low v, f, and d
6Which one of the four types of chip would be expected in a turning operation conducted at low cutting speed on a brittle work material:
- A(a) continuous
- B(b) continuous with built up edge
- C(c) discontinuous
- D(d) serrated?
7 Which one of the following cutting tools cannot be used on a turret lathe:
- A(a) broach
- B(b) cutoff tool
- C(c) drill bit,
- D(d) single-point turning tool
- E(e) threading tool?
8Which of the following are the three most important properties of a tool material that are suggested by the three modes of tool failure (three best answers)?
- A(a) ductility
- B(b) hot hardness
- C(c) impact resistance
- D(d) tensile strength
- E(e) toughness
- F(f) wear resistance
9 Which of the following are the two main functions of a cutting fluid in machining (two best answers)
- A(a) improve surface finish on the workpiece,
- B(b) reduce forces and power
- C(c) reduce friction at the tool chip interface,
- D(d) remove heat from the process
- E(e) wash away chips
10An open-loop system is a control system in which the output process variable of interest is compared with the corresponding input process parameter, and any difference between them is used to drive the input value into agreement with the output:
- AVerdadero
- BFalso
11Surface roughness in machining is determined by which of the following factors
- A(a) the use of coolant
- B(b) geometric factors of the operation
- C(c) workpiece material
- D(d) vibration and machine tool factor
12 In a turning operation, the change in diameter of the workpart is equal to which one of the following:
- A(a) 1 x depth of cut
- B(b) 2 x depth of cut,
- C(c) 1 x feed
- D(d) 2 x feed
13 Which one of the following is not one of the five basic parameters of a grinding wheel
- A(a) abrasive material
- B(b) bonding material
- C(c) grain hardness
- D(d) grain size,
- E(e) wheel grade
- F(f) wheel structure
14Friability refers to the capacity of the abrasive material to retain its sharpness during the grinding operation
- AVerdadero
- BFalso
15Smaller grain size in a grinding wheel tends to (a) degrade surface finish, (b) have no effect on surface finish, or (c) improve surface finish?
- A(a) degrade surface finish
- B(b) have no effect on surface finish
- C(c) improve surface finish?
16Which of the following would tend to give higher material removal rates:
- A(a) larger grain size
- B(b) smaller grain size?
17Which of the following will help to reduce the incidence of heat damage to the work surface in grinding (three correct answers): and
- A(a) frequent dressing or truing of the wheel
- B(b) higher feeds
- C(c) higher wheel speeds
- D(d) higher work speeds
- E(e) lower feeds
- F(f) lower wheel speeds
- G(g) lower work speeds
Información
- Descripción
- Manufacturing Test sobre Midterm Scams, creado por C Roy el 21/04/2017.
- Autor
- C Roy
- Idioma
- English
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- 0
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