What is portable electric drill? – NABTEB QUESTION
Portable electric drill is a hand drilling machine which uses electricity to generates the motion required in the drilling. It can be carried from work to work hence the name portable electric drill.
Explain the following terms: a. Tolerance b. Actual size c. Upper limit d. Lower limit e. Unilateral dimension f. Force fit – NABTEB QUESTION
1. Tolerance: This is the difference between the upper and lower limit of any dimension. It is the amount allowed for imperfection. e.g. Upper limit – lower = Tolerance 2. Actual Size: This is the real dimension given to any component outside the limits. I.e (20+...
Distinguished between ferrous and non-ferrous metals – NABTEB QUESTION
Ferrous Metal Non-Ferrous Metals Cast iron Aluminium Wrought iron Copper Steel Brass
Explain the term “Sensitive” as referred to the drilling machine. – NABTEB QUESTION
The term sensitive as referred to the drilling machine simply implies that one can feel all the stains on the drill in the feed handle of the drilling machine.Products
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