# Materials, Manufacturing and Industrial Engineering - Online Test

Q1. Match the CORRECT pairs.

Explaination / Solution:
No Explaination.

Q2. In simple exponential smoothing forecasting, to give higher weightage to recent demand information, the smoothing constant must be close to
Explaination / Solution:

Value of α close to one have less of a smoothing effect and give greater weight to recent changes in the data.

Q3. The process utilizing mainly thermal energy for removing material is
Explaination / Solution:
No Explaination.

Q4. A minimal spanning tree in network flow models involves
Explaination / Solution:

A path forms a loop or cycle if it connects a node itself. A spanning tree links all the nodes of network with no loops allowed.

Q5. Match the casting defects (Group A) with the probable causes (Group B):
Group A                                         Group B
(p) Hot tears                                  1: Improper fusion of two streams of liquid metal
(q) Shrinkage                                 2: Low permeability of the sand mould
(r) Blow holes                                3: Volumetric contraction both in liquid and solid stage
(s) Cold Shut                                 4: Differential cooling rate
Explaination / Solution:
No Explaination.

Q6. Cutting tool is much harder than the workpiece. Yet the tool wears out during the tool-work interaction, because
Explaination / Solution:
No Explaination.

Q7. The hot tearing in a metal casting is due to
Explaination / Solution:
No Explaination.

Q8. Consider the given project network, where numbers along various activities represent the normal time. The free float on activity 4-6 and the project duration, respectively, are

Explaination / Solution:
No Explaination.

Q9. A cylindrical blind riser with diameter d and height h, is placed on the top of the mold cavity of a closed type sand mold as shown in the figure. If the riser is of constant volume, then the rate of solidification in the riser is the least when the ratio h/d is

Explaination / Solution:

Q10. Which pair of following statements is correct for orthogonal cutting using a single-point cutting tool?
P. Reduction in friction angle increases cutting force Reduction in friction angle decreases cutting force
R. Reduction in friction angle increases chip thickness
S. Reduction in friction angle decreases chip thickness
Explaination / Solution:
No Explaination.