Processing
Crushing
Solved Example: 9102-01
On which of the following factors the crushing strength of stone does not depend? (SSC JE CE Mar 2017 Evening)
A. Texture
B. Workability
C. Specific gravity
D. Both the texture and specific gravity
Correct Answer: B
Grinding
Solved Example: 9104-01
Grinding of hard materials requires: (UPPSC AE Mech 2013 Paper I)
A. Fine grit size and hard grades
B. Fine grit size and soft grades
C. Coarse grit size and hard grades
D. Coarse grit size and soft grades
Correct Answer: B
Solved Example: 9104-02
Which factor decides the selection of the grinding wheel? (MPSC AMVI Paper III: Set A/2011)
A. Abrasive
B. Grain size
C. Grade
D. Structure
Correct Answer: B
Solved Example: 9104-03
Grinding is a: (NRL GET Mech Sep 2021 Shift III)
A. Multi-point machining process
B. Non-traditional machining operation
C. Single point machining process
D. None of the given options
Correct Answer: A
Crystallization
Solved Example: 9103-01
The crystallization technique is better than the simple evaporation technique and:
1. Crystallization is a process that separates a pure solid in the form of its crystals from a solution.
2. it is applied for the purification of salt that we get from seawater.
3. it is applied for the separation of crystals of alum from impure samples.
Select the correct answer using the code given below.
(IB ACIO Grade II Feb 2021 Shift II)A. 2 only
B. 1 only
C. 1, 2 and 3
D. 3 only
Correct Answer: C
Solved Example: 9103-02
Crystallisation is an example of? (SSC CGL Aug 2017 Shift I)
A. Physical Change
B. Chemical Change
C. Chemical Reaction
D. Galvanisation
Correct Answer: A
Solved Example: 9103-03
Out of the following, which salt has no water of crystallization? (RSMSSB Forester Nov 2022 Shift I)
A. Gypsum
B. Blue vitriol
C. Washing soda
D. Baking soda
Correct Answer: D