English
19
To measure the hourly rate of operation
Use the stopwatch to measure
the time required to complete 1
job.
1
Tachymeter scale indicated by
Second hand gives the average
number of jobs accomplished per
hour.
2
“180” (tachymeter scale figure) x 1 job
= 180 jobs/hour
Ex. 1
Ex. 1
Ex. 2: If 15 jobs are completed in 20 seconds:
“180” (tachymeter scale figure) x 15 jobs = 2700 jobs/hour
Second hand:
20 seconds
Tachymeter scale:
“180”
