SPPU Question Papers
Class: BE Mechanical (2015 Course)
Subject: Industrial Engineering
In-Semester
Examination
Unit 3: Work Measurements
March / April 2016
Q. 4)
a) Explain PMTS & MTM. [6 marks]
Q. 5) b) Following data relates to a work sampling
study of a long cycle non-repetitive operation.
i) Total
time of study = 10 days.
ii) Total
no. of observations = 1200.
iii) Observations
of Production activity = 900.
iv) Manually
controlled elements = 300.
v) M/c
Controlled elements = 300.
vi) Total
units Produce = 4000 pieces.
vii) Rating
index = 110%.
Observations of unavoidable delays =
100.
Calculate the standard time. Assuming
that the study was made for 5 hours per day & the industry is running for
single of 8 hrs. per day. [4 marks]
OR
Q. 6)
a) What is Allowance? Explain any three types of allowances. [6 marks]
Q. 6) b) A work sampling study was conducted for 100 hrs. in the machine shop in order
to estimate the standard time. The total number of observations recorded was
2500. No working activity could be noticed for 400 observations. The ratio
between manual and machine elements was 2:1. Average rating factor was
estimated as 1.15 and the total numbers of articles produced during the study
period were 6000. Rest & personal allowance may be taken as 12% of the
normal time. [4 marks]
March / April 2017
Q. 4)
b) Differentiate between time study and work sampling. [4 marks]
Q. 5)
a) Explain following terms -
predetermined motion time standards. [5 marks]
Q. 5)
b) Following are the element times of a machining operation.
Element
|
Observed
Time (Min)
|
Performance
Rating (%)
|
Relaxation
Allowance (%)
|
1
|
0.15
|
80
|
13
|
2
|
0.05
|
85
|
13
|
3
|
0.55
|
90
|
10
|
4
|
1.00
|
95
|
12
|
5
|
0.1
|
90
|
13
|
The corresponding rating and
relaxation allowances are given in table as below.
Calculate
normal time, standard time for this job assuming contingency allowance of 3% of
normal time. [5 marks]
OR
Q. 6)
a) What is allowance? Explain different
types of allowances with example. [6 marks]
Q. 6)
b) A work-study sample of a manufacturing
activity conducted over a 40-hour period shows that a worker with an 85% rating
produced 12 parts. The worker's idle time was 10% and the allowance factor was
12%. Find the normal and standard time for this activity. [4 marks]
March / April 2018
Q. 3) a) What are various allowances used.
Why allowances are considered in time study? [6 marks]
Q. 3)
b) Define work sampling. Explain in detail work sampling procedure. [4 marks]
Q. 5)
a) Write short notes on: (Any two) [4 marks]
i)
PMTS
iii)
MOST
Q. 5)
b) The work study engineer carried out the work sampling study. The following
observation were for a machine shop. [6 marks]
i)
The time duration of
study = 120 hrs.
ii)
Total no. observation =
7000
iii)
No. of working
activities = 1200
iv)
Ratio between manual to
a machine element 2:1
v)
Average rating factor =
120%
vi)
Total no. of jobs
produced during study = 800 units
vii)
Rest and personal time
for the job.
OR
Q. 6)
a) What is time study? State their limitations. [4 marks]
Q. 6)
b) The following data refers to a sampling study of production of one
component. [6 marks]
i)
Duration of data
collection = 5 days, 8 hrs per day.
ii)
No. of Operators = 10
iii)
Allowances given for
the process = 5%
iv)
Production quantity in
5 days = 6000 components
v)
Sampling data
collected.
Days
|
1
|
2
|
3
|
4
|
5
|
No.
of Observations
|
230
|
240
|
200
|
180
|
225
|
Occurrence
of Activity
|
200
|
190
|
170
|
150
|
210
|
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