# Industrial Engineering Questions and Answers – Time Study – Set 4

This set of Industrial Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Time Study – Set 4”.

1. Which of the following can be used to hold the stopwatch during time study?
a) Time study form
b) Steel rule
c) Micrometer
d) Time study board

Explanation: Time study board is used to hold the stopwatch and time study form while making time study using the stopwatch method. A stopwatch measure the time and the measured time is noted in the time form.

2. Which scale is also called as the percentage scale?
a) 100 scale
b) 75 scale
c) 60 scale
d) 25 scale

Explanation: Rating scale is used for rating performance. There are several rating scales. Of them, 100 Scale is most widely used. The normal rate of doing work is represented by 100 and the average incentive percentage is 133. 100 Scale is also known as the percentage scale.

3. Which scale is also known as the point scale?
a) 100 scale
b) 75 scale
c) 60 scale
d) 25 scale

Explanation: Rating scale is used for rating performance. There are several rating scales. 60 scale is also known as the point scale. The normal rate of doing work is represented by 60 and the average incentive percentage is 80.

4. Which of the following is not a work factor in work factor system?
a) Direction control
b) Care
c) Definite stop
d) Definite control

Explanation: Work factor is an element of difficulty in performing an operation/activity. There are generally four work factors in the system. They are
i) Directional control (Steer) – S (Symbol)
ii) Care (Precaution) – P
iii) Change direction – U
iv) Definite stop – D

5. Which of the following time study method requires more time to perform time study?
a) Stopwatch method
b) PMTS
c) Synthesis technique
d) Analytical estimating

Explanation: Stopwatch method requires more time to perform time study as it requires the involvement of more and more manpower. On contrary to it, PMTS, Synthesis technique and analytical estimating use standard data and previous records of the time study of the elements to calculate the standard time.

6. What is the maximum eye travel time (in TMU) in M-T-M technique of PMTS?
a) 20
b) 22
c) 12
d) 02

Explanation: Eye travel time is the time taken by the eyes to travel from one point to another point. Maximum eye travel time is 20 TMU.

7. Which of the following formula is correct to calculate eye travel time (ET) in the M-T-M system?
a) Eye travel time = $$\frac {15.2 \times Distance \, travelled \, by \, eye}{The \, perpendicular \, distance \, from \, eye \, to \, the \, line \, of \, travel}$$
b)Eye travel time = $$\frac {15.2 + Distance \, travelled \, by \, eye}{The \, perpendicular \, distance \, from \, eye \, to \, the \, line \, of \, travel}$$
c) Eye travel time = $$\frac {15.2 – Distance \, travelled \, by \, eye}{The \, perpendicular \, distance \, from \, eye \, to \, the \, line \, of \, travel}$$
d) Eye travel time = $$\frac {5.2 \times Distance \, travelled \, by \, eye}{The \, perpendicular \, distance \, from \, eye \, to \, the \, line \, of \, travel}$$

Eye travel time is the time taken by the eyes to travel from one point to another point. Maximum eye travel time is 20 TMU. Mathematically, eye travel time can be calculated using the below formula-
Eye travel time (ET) = $$\frac {15.2 \times Distance \, travelled \, by \, eye}{The \, perpendicular \, distance \, from \, eye \, to \, the \, line \, of \, travel}$$

8. Eye travel time varies directly with the distance of points from and to which the eye travels and indirectly with the perpendicular distance from the eye to the line of travel.
a) True
b) False

Explanation: Eye travel time varies directly with the distance of points from and to which the eye travels and indirectly with the perpendicular distance from the eye to the line of travel. It can also be proved from the below mathematical formula:
Eye travel time (ET) = $$\frac {15.2 \times Distance \, travelled \, by \, eye}{The \, perpendicular \, distance \, from \, eye \, to \, the \, line \, of \, travel}$$

9. How many work factors are there in work factor system?
a) Three
b) Four
c) Seven
d) Five

Explanation: Work factor is an element of difficulty in performing an operation/activity. There are generally four work factors in the system. They are
i) Directional control (Steer) – S (Symbol)
ii) Care (Precaution) – P
iii) Change direction – U
iv) Definite stop – D

10. Which of the following is not a variable that affects the time required to perform a task in the work factor system?
a) Body members
b) Distance moved
c) Weight
d) Servicing

Explanation: Four major variables affect the time required to perform a task in the work factor system. They are as follows:
i) Body members like arms, fingers, hand, trunk, foot, leg
ii) Distance moved in inches or centimeters
iii) Manual controls in work factors
iv) Weight or resistance

11. Time unit in work factor system is not smaller than the M-T-M system.
a) True
b) False

Explanation: Time unit in work factor system is smaller than the M-T-M system. M-T-M system has time units measured in TMU (time measurement unit) which is equal to 0.0006 minutes. In the work factor system, onetime unit is 0.0001 minute.

12. Which of the following time study technique is an application in the electronic industry?
a) Work factor system (WF)
b) M-T-M system
c) Dimensional motion times (DMT)
d) Motion time analysis (MTA)

Explanation: Work factor system is a time study technique used in the electronic industry to calculate the standard time in manufacturing and assembly related activities. It is also used in industries making small, light hand assemblies.

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