BSIE Work Study & Methods Engineering 1 — Questions and Answers
Question 1: Which technique is used in work study to record all activities performed by an operator or machine on a single chart?
- Man-machine chart (Correct answer)
- Flow process chart
- Operation process chart
- String diagram
Correct answer: Man-machine chart
A man-machine chart records the simultaneous activities of an operator and machine on a time-scaled chart to identify idle periods.
Question 2: In time study, the rating factor is used to:
- Measure the actual time taken by a worker
- Convert observed time to normal time (Correct answer)
- Add allowances to normal time
- Calculate the standard deviation of cycle times
Correct answer: Convert observed time to normal time
The rating factor adjusts observed time to normal time by accounting for the pace of the worker relative to a standard pace.
Question 3: Which of the following is the correct formula for Standard Time?
- Normal Time + Observed Time
- Observed Time × Rating Factor + Allowances
- Normal Time × (1 + Allowance Fraction) (Correct answer)
- Observed Time / Rating Factor
Correct answer: Normal Time × (1 + Allowance Fraction)
Standard Time = Normal Time × (1 + Allowance Fraction), where Normal Time = Observed Time × Rating Factor.
Question 4: A work sampling study is best suited for:
- Measuring the exact time of short, repetitive tasks
- Estimating the percentage of time spent on various activities (Correct answer)
- Determining machine cycle times
- Calculating the number of motions in a task
Correct answer: Estimating the percentage of time spent on various activities
Work sampling uses random observations over a period to estimate the proportion of time spent on different activities without continuous observation.
Question 5: In a Methods-Time Measurement (MTM) system, which basic motion has the shortest normal time?
- Reach
- Grasp (Correct answer)
- Apply pressure
- Eye travel
Correct answer: Grasp
Grasp is generally the shortest basic motion in MTM, as it involves simply closing fingers on an object already in position.
Question 6: The purpose of a SIMO (Simultaneous Motion) chart is to:
- Plan factory layouts
- Record left-hand and right-hand motions simultaneously at a micro-motion level (Correct answer)
- Schedule production activities
- Analyze material flow in a plant
Correct answer: Record left-hand and right-hand motions simultaneously at a micro-motion level
A SIMO chart records the micro-motions of both hands simultaneously using therblig symbols to identify inefficiencies in hand motions.
Question 7: Which allowance in work study accounts for fatigue, personal needs, and unavoidable delays?
- Machine allowance
- Process allowance
- PFD allowance (Correct answer)
- Interference allowance
Correct answer: PFD allowance
PFD (Personal, Fatigue, and Delay) allowance is added to normal time to account for worker fatigue, personal time, and unavoidable delays.
BSIE Work Study & Methods Engineering 1
Which technique is used in work study to record all activities performed by an operator or machine on a single chart?