Question 515General Subjects - Assistant Engineer
70% to passWhat class of screw thread is indicated with a machine screw described as 1/2-13 NC-2?
A1/2
B13
CNC
D2
AI Explanation
The correct answer is D) 2. The nomenclature 1/2-13 NC-2 refers to the following characteristics of the machine screw: 1/2 - The diameter of the screw is 1/2 inch. 13 - The screw has 13 threads per inch. NC - The thread type is National Coarse. 2 - The class of fit for the screw thread is Class 2. The class of fit, indicated by the "2" in this case, specifies the tolerance and allowance between the screw and the mating hole. Class 2 is a common general-purpose fit, suitable for most applications. The other options, A) 1/2, B) 13, and C) NC, describe other components of the screw thread designation, but do not directly indicate the class of fit.
Related Questions
Q327:What type of propeller consists of a flat disc set flush with the under surface ... Q54:Which of the following illustrations represents the proper method of circuit gro... Q151:Which of the following statements is true concerning the application for an isoc... Q96:Small droplets of water entrained in the flashed vapor produced in a flash-type ... Q502:When internal threading for piping where the work permits the tap to be run enti...
Ready to test your knowledge?
Take a General Subjects - Assistant Engineer Practice ExamOfficial Resources