• 2022-06-07
    The pitch angle is 2.0°, the angle of attack is 5.0°, the descent gradient is about %.
    A: -8.75
    B: -5.2
    C: -3.5
    D: -12.3
  • B

    内容

    • 0

      The sum of rake Angle, clearance angle and wedge Angle is ( ).The sum of the major cutting edge angle, minor cutting edge angle, and tool included angle. is ( ) A: 90 ° , 180 ° B: 90 ° , 90 ° C: 180 ° , 180 ° D: 180 ° , 90 °

    • 1

      Measured<br/>in main section, the angle between the rake surface and the reference<br/>plane is (). A: rake γo B: clearance angle αo C: Cutting edge angle κr D: Inclination angle λs

    • 2

      Along an involute gear profile, the pressure angle on ___ equals to zero. A: Base circle B: Pitch circle C: Reference circle D: Dedendum circle

    • 3

      按Angle 分类法以下何为正确 A: AngleⅠ类是正常咬合 B: AngleⅡ类多为反合 C: AngleⅢ类多为深覆盖 D: Angle Ⅲ 类的下颌为远中咬合关系 E: 右侧为AngleⅢ类关系,左侧为Ⅰ类关系时也属Angle Ⅲ 类错合

    • 4

      The index to measure the wettability of powder is A: Angle of repose B: contact angle C: CRH D: Porosity