Materials, Manufacturing and Industrial Engineering - Online Test

Q1.
A hole is specified as  The mating shaft has a clearance fit with minimum clearance of 0.01 mm. The tolerance on the shaft is 0.04 mm. The maximum clearance in mm between the hole and the shaft is
Answer : Option C
Explaination / Solution:



Q2. In orthogonal turning of low carbon steel pipe with principal cutting edge angle of 90o, the main cutting force is 1000 N and the feed force is 800 N. The shear angle is 25o and orthogonal rake angle is zero. Employing Merchant’s theory, the ratio of friction force to normal force acting on the cutting tool is
Answer : Option C
Explaination / Solution:



Q3. During normalizing process of steel, the specimen is heated
Answer : Option C
Explaination / Solution:

In normalization process Steel is heated above upper critical temperature and cooled in still air.

Q4. Match the following metal forming processes with their associated stresses in the work-piece.
Metal forming process             Type of stress
1. Coining                                P. Tensile 
2. Wire Drawing                      Q. Shear 
3. Blanking                              R. Tensile and compressive 
4. Deep Drawing                     S. Compressive
Answer : Option A
Explaination / Solution:

Coining → Compressive 
Wire drawing→ Tensile 
Blanking → Shear 
Deep Drawing → Tensile and Compressive

Q5. In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate
Answer : Option D
Explaination / Solution:


Graph of abrasive flow rate v/s tool tip distance metal removal rate is proportional to abrasive flow rate. As the tool tip distance increase, area of contact increases which results in higher metal removal rate. But after a certain distance, the jet looses its velocity, hence metal removal rate decreases.

Q6. A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0, 0) and (100, 100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min. Milling time for the slot (in seconds) is
Answer : Option B
Explaination / Solution:

Given data: width (b) = 10 mm 
 depth (t) = 2 mm 

points (0, 0) & (100, 100) 


Q7. Which one of the following is NOT a decision taken during the aggregate production planning stage?
Answer : Option A
Explaination / Solution:
No Explaination.


Q8. A fillet welded joint is subjected to transverse loading F as shown in the figure. Both legs of the fillets are of 10 mm size and the weld length is 30 mm. If the allowable shear stress of the weld is 94 MPa, considering the minimum throat area of the weld, the maximum allowable transverse load in kN is


Answer : Option C
Explaination / Solution:
No Explaination.


Q9. In a single pass drilling operation, a through hole is 15 mm diameter is to be drilled in a steel plate of 50 mm thickness. Drill spindle speed is 500 rpm, feed is 0.2 mm/rev and drill point angle is 118°. Assuming 2 mm clearance at approach and exit, the total drill time (in seconds) is
Answer : Option A
Explaination / Solution:
No Explaination.


Q10. Details pertaining to an orthogonal metal cutting process are given below.
Chip thickness ratio                                0.4 
Undeformed thickness                            0.6 mm 
Rake angle                                              +10° 
Cutting speed                                          2.5 m/s 
Mean thickness of primary shear zone    25 microns 
The shear strain rate in during the s-1 process is 
Answer : Option C
Explaination / Solution:
No Explaination.