- A. Deliver molten metal into the mould cavity
- B. Act as a reservoir for the molten metal
- C. Feed the molten metal to the casting in order to compensate for the shrinkage
- D. Deliver the molten metal from pouring basin to gate
Workshop Technology
-
The purpose of a riser is to_____.
-
When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by_____.
- A. Washing it with water
- B. Rubbing on wood
- C. Washing it with dilute acid
- D. Using file card
-
Extrusion_____.
- A. Is extensively used for making bolts and nuts
- B. Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work
- C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface
- D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part
-
Which of the following welding method uses a pool of molten metal?
- A. Carbon arc welding
- B. Submerged arc welding
- C. TIG arc welding
- D. MIG arc welding
-
the most preferred process for casting gas turbine blades is_____.
- A. Die casting
- B. Shell moulding
- C. Investment moulding
- D. Sand casting
-
Cold working of metal increases_____.
- A. Tensile strength
- B. Yield strength
- C. Hardness
- D. All of these
-
A casting defect which occurs due to improper venting of sand is known as_____.
- A. Cold shuts
- B. Blow holes
- C. Shift
- D. Swell
-
The chisel used for cutting key ways is_____.
- A. Flat chisel
- B. Cape chisel
- C. Round nose chisel
- D. Diamond pointed chisel
-
The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as_____.
- A. Hot piercing
- B. Extrusion
- C. Cold peening
- D. Cold heading
-
In a _____, both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram.
- A. Simple die
- B. Progressive die
- C. Combination die
- D. Compound die
- 1
- 2