The factors influencing the output of a machine in construction are 1. physical site conditions 2. condition of the machine 3. method of operation 4. type of soil Which of the above factors are correct?
- A1, 2 and 3 only
- B1, 2 and 4 only
- C2, 3 and 4 only
- D1, 2, 3 and 4Correct
Solution
Concept
Output of construction machinery
Step-by-step solution
1. Site conditions (access, grade, weather). 2. Condition and age of the machine (maintenance). 3. Method of operation and operator skill. 4. Type of soil (digging resistance, swell, compaction).
Explanation
Machine output depends on the machine, the work and the operator. All four listed factors influence it.
Why the other options are wrong
Each of the other options leaves out one valid factor.
Shortcut
Output ∝ machine, method, site and material.
Common mistake
Dropping the soil type.
Correct answer: D) 1, 2, 3 and 4