manufacturing analysis
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MechanicalTRANSCRIPT
Manufacturing analysis:
1. Process capability is defined as – 6 σ.
2. Process capability of the design depends upon – Resilience.
3. Which one is most desirable – Process spread < Upper specification –
Lower specification.
4. A process is said to be under control if there are – only chance causes.
5. The minimum tolerance to which machine can possibly be expected to
work and produce no defectives under the specified conditions, of a
manufacturing process or a machine is called its – process capability
study and machine accuracy study.
6. Tolerances are specified – because it is not possible to manufacture a
size exactly.
7. The most flexite criterion for analysis an economic investment is –
Present value method.
8. Salvaging means – disposing of property which is no longer useful in
present situation.
9. Merit rating is the method of determining the – relative values of a job.
10. Job evaluation is the method of determining the – Relative values of a
job.
11. A compact estimate about the amount of materials handling between
various work stations, is obtained from – Travel chart.
12. By routing the engineer decides in advance – Flow of material in the
plant.
13. The unit cost in case of batch production as compared to jobbing
production is – Low.
14. In Mass production – The unit cost is low, the operations are capital-
intensive.
15. A continuous production of products of the same design on a line of
machines arranged according to the required sequence of operations, is
known as –
16. Direct cost of a project constitutes – Cost of materials, wages of labour.
17. Indirect expenses include – Factory expenses, selling expenses, and
administrative expenses.
18. Items which can be analyzed by value analysis technique are – Simple
items, complicated items, cash programme items, cost consciousness
items.
19. Standard time as compared to normal time is – Greater.
20. Work cost is equal to – Factory cost +Primary cost.
21. Which one of the following is the correct statement about time wage
system – The workers are paid out hourly, daily, weekly or monthly rate.
22. Time standards are used for –
23. The process, which prescribes the sequence of operation to be followed is
known as –
24. In Breakeven analysis, the total cost consists of – Fixed cost + Variable
cost.
25. At Breakeven point – Sales revenue and total cost are equal.
26. If the sales revenue is more than total cost, then breakeven analysis shows
– Profit.
27. Standard time is equal to – Normal time +Allowances.
28. Depreciation of machines is categorized under the – Indirect expenses
head.
29. All financial decisions on any project appraisal are based on the – Present
value of money.
30. The capital and running costs of similar machines having unequal service
life can be compared by – Equivalent annual cost method.
31. Capital expenditure means – Expenditure on procurement of fixed assets.
32. Which of the following depreciations system ensures that the interest be
charged on the cost of machine asset every year on the book value, but
the rate of depreciation every year remains constant – Annuity charging
method.
33. An optimum project schedule implies – Lowest possible cost and shortest
possible time.
34. Routing is essential in - ?
35. Current assets include – Inventory.
36. Which one of the following in favourable – Reject limits lie outside
control limit.
37. When there are a large number of points near or outside the control limits
which of the following pattern may arise – Universe??
38. Tool or die wear may lead to which of the following pattern on control
chart – Trend.
39. The statistical approach - Allows wider tolerances compared to complete
interchangeability approach, bases the permissible tolerance on the
normal distribution curve, and Permits cheaper production methods.
40. Those causes of variations which are larger in magnitude and can be
easily identified are – Assignable causes.
41. If the variations due to certain causes are within tolerable value, the
causes are said to be – Chance causes.
42. The standard tolerance unit I in the case of limits and fits for sizes above
500mm and upto 3150 mm is .004D + 2.1 ( D is in mm)
43. Gnatt Chart indicates – Comparison of actual progress with the scheduled
progress.
44. Bar charts are suitable for – Minor projects.
45. On a bar chart the various activities of a project are shown by –
Horizontal line.
46. Jobs going ahead of schedule are conveniently shown on – Gantt chart.
47. PERT technique of network analysis is useful for – Research and
development project. It is based on Optimistic time, Pessimistic time, and
most likely time. In PERT analysis the actual performance of task is
known as – Activity. The estimated time required to complete an activity
is termed as -
48.
49. String Diagram:
50. Bin Chart:
51. A milestone chart – Shows the events in chronological, but not in a
logical sequence.
52. The interrelationship between the functional elements of a programme is
achieved through - Work break down structure.
53. Pi chart
Production planning and control:
1. Production planning consists of – Preplanning and routing.
2. Forecasting provides guide lines on – How many of the products
produced are likely to be demanded by the customer, amount of business,
the firm can expect during the planning period, materials requirement
schedules.
3. Forecasting which assumes a static environment in the future is –Passive
forecasting.
4. The function which authorizes production as well as control is –
Scheduling.
5. The quality model of forecasting based on the consensus opinion of a
panel of experts is called – Delphi Method.
6. Chart which is useful for scheduling and control is – Gantt chart.
7. The monitoring and follow up function intended for completion of job
within the due date is called – Expediting.
8. The production planning function refers to the determination of the
sequence of operation to be performed for the job and allocation of
facilities where these operations are to be performed is called as –
Routing.
9. The prime input for aggregate planning is - demand forecasting.
10. Qualitative models for forecasting are based on subjective opinion and
judgment.
11. Sequencing is a subject of - Scheduling.
12. Long range of forecasting is – More than 3 years.
13. Advantages of Delphi method is that it – Provides intuitive base for
forecasting, is useful for long range planning, is helpful for development
of new products.
14. Degree of relationship between two or more variables is expressed by –
Correlation.
15. * * * *The regression equation indicating the demand for a consumer
durable item and agricultural per capita income has been developed as Y
= .81 +.395 X. for the 8 sets the data collected ΣX= 184, Σ XY=2146, Σ
XY2 =5006, ΣY2=950. The standard deviation of the regression is ---2.2.
16. The preplanning or productions, work force and inventory at the broadest
level is – Aggregate planning.
17. Cost computations for the strategies depends upon the – strategy applied,
data available, common logic used in computation.
18. In linear programming approach, the demand for a particular period can
be fulfilled by – Regular time production, over time production, sub
contract.
19. Regression method of forecasting is applicable mainly for – Casual
models.
20. The master schedule – Is the outcome of the aggregate planning, drives
the entire production system, is a high level schedule that specifies what
end products or product modules are to be produced and the time period
during which they are to be made.
21. Master schedule –determines the overall production plan for the near
future, provides rough time schedule for production of final products,
refer to the end items or final product.
22. Master scheduling considers – Demand forecast and pending orders,
resource availabilities and capacities, stock status and inventory
information, feedback information on actual shop loads.
23. Determination of the sequence of operations to be performed and the
allocation of facilities where these operations are to be performed is –
Routing.
24. Routing procedure depends upon – Type of manufacturing – Job, Batch,
Mass/ Flow production, Nature of processes involved, availability of
plant, Machineries and facilities, Characteristics of the plant, machineries
and facilities.
25. A route sheet may be designed to combine activities such as authority to –
production, material requirements, and tool orders and move orders.
26. A decision making process to determine when a job is to be started in a
machine and when it is to be completed, is – Scheduling.
27. The order in which different jobs are being taken up in a machine or
process is called – Sequencing.
28. In sequencing – the various tasks belong to the various jobs; the tasks are
performed on the same facility, acts as an aid to determine the scheduling,
emphasis is on the economic order.
29. In routing – the various tasks belong to the same job, tasks are performed
in various facilities, acts as a constraint for scheduling, emphasis is on the
technological order.
30. The main difference between flow shop and job shop models in
scheduling is that – in the flow shop the routing for all jobs through the
machines is unidirectional where as in the job shop the routing may
follow any path.
31. Objectives of scheduling problem is – Efficient utilization of the
resources, Rapid respond to demands, conformance to the prescribed dead
lines, completion of job at the minimum total time.
32. The amount of time measured from the zeroth time, at which the job is
due to be completed is – due date.
33. The time at which the processing of the job in the machine is completed,
is –completion time.
34. Tine taken for the job from its arrival to the system until its departure, is –
flow time.
35. The algebraic difference between the flow time and due date is – Jobs.
36. The lateness of the jobs, failing to meet the due date is called – Job
tardiness.
37. The mean number of jobs in the processing system at a time, is called –
inprocess inventory.
38. Maximum flow time – is the maximum time at which any job stays in the
system.
39. Shortest processing time sequencing minimizes the – mean flow time,
inprocess inventory, mean lateness, mean waiting time.
40. SPT sequencing of jobs in a single facility would – Shortest the mean
lateness.
41. The sequencing of jobs in the ascending order of their processing time, is
known as – Shortest processing time.
42. Sequencing of jobs in a single facility, would – minimize the maximum
lateness, be independent of processing times of the job, and minimize the
maximum tardiness.
43. Most work Remaining priority rule in the job shop dynamic system would
most often give satisfactory performance for minimizing –Make span.
44. Whenever some jobs are found waiting for the operation equal to or
greater than maximum allowable waiting time, over-riding priority is
given and are dispatched as per – First come First served.
45. Flow control is adopted for control of – production of large volumes of
single or a few types of products.
46. Order control refers to the individual control exercised over the –
materials, quantity and quality, processing details, progress of work on
each job or lot.
47. in flow control system – the rate of flow of raw materials to the finished
products are controlled in such a manner to ensure smooth flow, all units
are routed along a fixed path, high volume, line assembled products are
controlled.
48. Kanban is Japanese term indicating – information for production and
withdrawal of items.
49. The ultimate aim in Just-In-Time production system leads to Batch size
one, Zero inventory, 100%.
50. Principle or philosophy of JIT is – set up cost should be reduced, the goal
should be zero inventor, productivity and quality inseparable.
51. Kanban is an information carrying the expression of needs, is a simple
way of controlling production, is a request for production or withdrawal
of parts.
52. Modi method is used for checking optimality of – transportation model.
53. Time series model – is based on past data as well as its behavior, with
respect to time, is a set observations of some variable over time, is
tabulated or indicated in a graph.
54. component of a time serial model is – trend, cyclic variation and seasonal
variation, random variation.
55. the ratio which relates a recurring seasonal variation to the corresponding
trend value at the given period is – Seasonal index.
56. For exponential smoothing method Tt = β [Ft - F t-1] + [1- β] T t-1. where is
the smoothing constant for trend.
Work study:
1. SIMO charts are used in – micro motion study.
2. A SIMO chart is – graphic representation of the separable steps of each
pertinent body member of the individual.
3. Micromotion study is the – Subdivision of an operation into therbligs and
their analysis.
4. string diagram is used when –
5. Gantt charts are used for – production scheduling. This chart gives
simultaneous information about the progress of work and machine
loading.
6. A chart used to review the overall sequence of an operation by focusing
either the movement of operators or materials is called – Flow process
chart.
7. Stop watch is the basic tool in work study.
8. Bar charts are suitable for minor works.
9. Time study is done by means of – stop watch and time study sheet.
10. Average time recorded by work study man for an operation is known as –
representative time.
11. Standard time is equal to normal time + allowances.
12. Allowances added to normal time of a given work element to get
elemental standard time is – relaxation allowance, tool allowance, reject
allowance.
13. Normal time is –
14. Time study is - the appraisal, in terms of time of the value of work
involving human effort.
15. Time study is carried out by – breaking up each operation into small
elements, which can be measured accurately.
16. Time study is used to – provide a basis for setting piece price or incentive
wages, determine standard costs, determine the number of machines a
person may run, compare alternative method.
17. The standard of an operation is defined as the time taken by a – trained
worker to perform that operation while working at a steady space.
18. Time standards are used for – cost estimating, performance evaluation of
individual worker, incentive payments.
19. Work study is used in- industries, hospitals, transport, design.
20. Chart used in work study are – man machine chart, flow process chart,
operation process chart.
21. Time study is carried out to determine the time required to complete job
by – average worker.
22. Time standards developed by time study can be used for – plant layout,
budgetary control, equipment selection, wages and incentives.
23. study used to find a simpler, easier and better way of performing a job, is
known as – motion study .motion study is used for –improving a work
method by locating deficiencies, improving a work method by assisting in
adjusting the pattern of inter relationships. Designing a work method by
logical analysis and synthesis.
24. Motion study is used for – improving a work method by locating
deficiencies, improving a work method by assisting in adjusting the
pattern of inter relationships. Designing a work method by logical
analysis and synthesis.
25. Analysis of man work method by using a motion picture camera with a
timing device in the field of view, is known as – micromotion study.
26. Study used to determine the most economical and effective method of
performing a job and also time required by trained employees working at
a normal pace to perform the job is known as – Motion and time study.
27. Micromotion study is used to – Help in ending out the most efficient way
of doing work, help in collecting the motion time data for synthetic time
standards, train the individual operator regarding the motion economy
principles.
28. Study of the systematic investigation of the existing methodof doing a job
in order to develop and install an easy, rapid, efficient and effective
procedure for doing the same job and at low costs, is known as – Method
study.
29. Objectives of work measurement are to –Plan and schedule the
production, formulate a proper incentive scheme, and estimate the selling
price and delivery date.
30. Motion study involves analysis of – actions of operator, layout of work
place, tooling and equipment.
31. Expediting function consists in keeping a watch on – flow of material and
in case of trouble locate source of trouble.
32. Object of time study is to determine the time taken by – Average worker.
33. The purpose of micromotion study is to – Assist in finding out the most
efficient way of doing work, train the individual operator regarding the
motion economy principles, help in collecting the motion time data for
synthetic time standards.
34. PMTS (Predetermined Motion Time Systems) include MTM (Method
Time Measurement), WFS (Work Factor Systems) and BMTS (Basic
Motion Time Study).
35. MTM is used to – develop effective methods in advance of the beginning
of production, improve existing methods, estimate cost, establish time
standards.
36. Job evaluation is the method of determining the – Relative values of a
job.
37. The primary object of Method study – is to develop the most practical,
economical and effective method of work.
38. A Process Chart is a representation of – The most important stage in the
production process, the finished product contrasted with the raw material,
the sequence of event of the work.
39. The arrangement in the sequence of operation in simplification in a
motion study (method study) are – Assembling, inspection, storage,
dispatching.
40. The time taken by a normal worker for a specific task or job working
under moderate condition and including other allowances such as fatigue,
setting of tool and job, repairing of tool and checking job etc is known as
– Standard time.
41. The path and movements followed by men, material and equipments in
executing the activities are indicated by – Flow diagram.
42. The principle in which men and materials have to move the minimum
required distance between operations is called – Principle of minimum
distance.
Mathematical problems:
Operation Research:
1. The mathematical technique for finding the best use of limited resources
in an optimal manner is known as – Operation Research.
2. In order that linear programming techniques provide valid results –
relation between factors must be linear (positive) and (negative).
3. The linear programming techniques can be applied successfully to
industries like – iron and steel, food processing, oil and chemical,
banking.
4. The simplex method is the basic method for – Linear Programming.
5. Graphical method, simplex method, transportation method are connected
with – Linear Programming.
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