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UPSC Civil Service Exam Questions - Engineering

Q1:

When power shovels are operated under different site conditions (in terms of material handled), what is the correct sequence in the increasing order of the ouput for the following materials ?
1. Well - blasted rock
2. Hard and tough clay
3. Poorly blasted rock
4. Moist loam or sand
Select the correct answer using the code given below :

A 1 - 2 - 3 - 4

B 1 - 4 - 3 - 2

C 4 - 2 - 3 - 1

D 4 - 3 - 1 - 2

ANS:C - 4 - 2 - 3 - 1

For moist loam materials, the output of power shovels for a fixed shovel size will be maximum.