MCQ Questions on Manufacturing Processes
1- In metal cutting operations, discontinuous chips are produced while machining:
(A) Brittle materials
(B) Ductile materials
(C) All of the above
(D) None of the above
2- Centering can be done most accurately on:
(A) Collet
(B) Lathe dog
(C) Three-jaw chuck
(D) Four-jaw chuck
3- An operational NC system consists of:
(A) Program of instruction
(B) Controller unit
(C) Machine tools
(D) All of the above
4- Pouring basin is used in sand castings to
(A) reduce the momentum of the molten metal
(B) remove the slag and dirt present in the molten metal
(C) reduce the mold erosion
(D) all of the above
5- The following type of gate is used for trapping the slag in a sand mold:
(A) Bottom gate
(B) Whirl gate
(C) Parting gate
(D) Step gate
6- Blowholes in sand casting are caused by
(A) poor casting design
(B) lower strength of the solidified metal
(C) higher moisture in the molding sand
(D) faulty molding flask
7- Rat tails and buckles in sand casting are caused by
(A) lower refractoriness of the molding sand
(B) lower strength of the solidified metal
(C) lower strength of the molding sand
(D) lower hardness of the molding sand
8- Drop forging is used to make parts in
(A) open-impression dies that involves only upsetting operation
(B) close-impression dies that involves only upsetting operation
(C) close-impression dies that involves only drawing out operation
(D) open-impression dies that involves only drawing out operation
9- Sheet metal drawing operation is used to make
(A) wire
(B) tube
(C) cup shaped parts
(D) rods
10- Bending produces the following types of forces in the parts
(A) tensile
(B) compressive
(C) tensile and compressive
(D) shear
11- Straight polarity in arc welding is obtained with
(A) alternating current electrode with electrode being positive
(B) direct current electrode with electrode being positive
(C) direct current electrode with electrode being negative
(D) alternating current electrode with electrode being negative
12- Advantage of coated electrode for shielded metal arc welding process
(A) gives off inert gases and protects molten weld pool
(B) provides arc stabilizing compounds
(C) provides flux to remove oxide from the weld joints
(D) all of the above
ANSWERS:
1-(A), 2-(D), 3-(D), 4-(D), 5-(B), 6-(C), 7-(C), 8-(C), 9-(C), 10-(C), 11-(C), 12-(D)