Railways NTPC (Technical Ability) Metrology and Inspection Question Bank Metrology and Inspection

For a manual operation observed time data are given below:

Recorded time                : 15 minute

Rating of the worker           : 80%

Personal allowance            : 0.6 minute

Basic fatigue allowance        : 0.8 minute

Contingency work allowance    : 12 minute

Unavoidable delay allowance   : 11 minute

What is the standard time for the operation?

A) 16.4 minute

B) 175 minute

C) 185 minute

D) none of the above

Correct Answer: D

Solution :

Standard time \[=15\left[ 0.8\left\{ 1+\frac{0.6+0.8+1.2+1.1}{15} \right\} \right]\] \[=1.5\,[0.8(1+0.2467)]=14.96\,min\]

Recorded time	:	15 minute
Rating of the worker	:	80%
Personal allowance	:	0.6 minute
Basic fatigue allowance	:	0.8 minute
Contingency work allowance	:	12 minute
Unavoidable delay allowance	:	11 minute