NABTEB

Write short notes on the following i. Normalizing ii. Annealing iii. Tempering iv. hardening – NABTEB QUESTION

i. NORMALIZING Normalizing is a heat treatment process in which the steel heated to 3°C-500°C above the upper critical point…

4 years ago

What is carburizing? – NABTEB QUESTION

Carburizing is the process of adding carbon to the surface layer of low carbon steel. The Carburize components possess a…

4 years ago

Write briefly on the following forging processes: (i) Upsetting (ii) Drawing down (iii) Twisting (iv) Forming – NABTEB QUESTION

(i) Upsetting This is a foregoing operation in which the material being forged is thickened or bulged and at the…

4 years ago

State TWO purposes of annealing a steel. – NABTEB QUESTION

(i) To relieve internal stresses (ii) To soften the material

4 years ago

Describe the following heat treatment processes: (i) tempering (ii) carburizing – NABTEB QUESTION

(i) Tempering is often called drawing or drawing the temper. It is heat treatment process which relieves internal strain in…

4 years ago

List the tools used to produce both internal and external thread on bench. – NABTEB QUESTION

The tool used to produce both internal and external thread on the bench are: - Tap and die respectively -…

4 years ago

State TWO Safety precautions to be observed when cutting a piece of metal with an hacksaw and when filling a piece of metal with a file. – NABTEB QUESTION

Cutting a piece of metal with a hacksaw (1) The work piece must be squarely fixed to the bench vice.…

4 years ago

Outline any SIX protective wears in the workshop – NABTEB QUESTION

1. Apron 2. Gloves 3. Goggles or shield 4. Helmet 5. Safety boots 6. Overall

4 years ago

What is Forging? – NABTEB QUESTION

Forging is the process of bending, twisting and hammering of any component to desired or required shape.

4 years ago

In the process of heat treatment of steel what do you understand by: 1. Case hardening 2. Tempering 3. Normalizing – NABTEB QUESTION

1. Case Hardening is the process of making the outer part of a component to be hard while leaving the…

4 years ago