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
Q525:A horizontal electro-mechanical anchor windlass is equipped with two warping hea... Q670:The operation of the device shown in the illustration is dependent upon ________... Q596:In accordance with federal regulations under 33 CFR Subchapter O, for U.S non- o... Q252:As it pertains to safety valves, what is the definition of blow down? Q390:A recirculating, or bleed-off line is installed on a centrifugal pump in order t...
Ready to test your knowledge?
Take a General Subjects - Assistant Engineer Practice ExamOfficial Resources