MCQ on Manufacturing managementMCQ on Manufacturing processes

GATE – Multiple Choice Questions –Production and Industrial Engineering

GATE – 2011 – Production and Industrial Engineering

 

A circular steel shaft is under elastic deformation due to torsion. The relationship between modulus of elasticity (E) and shear modulus of elasticity (G), taking v as Poisson’s ratio, is

(A) G = 2 E (1 + v)

(B) E = 2G (1 + v)

(C) G = 2E / (1 + v)

(D) E = 2G / (1 + v)

(Ans: B)

 

An ideal air standard Diesel cycle does NOT contain the following process:

(A) constant volume heat addition

(B) constant volume heat rejection

(C) isentropic compression

(D) isentropic expansion

(Ans: A)

 

Which of the following is a surface (two-dimensional) imperfection in the crystal structure of common metals?

(A) Vacancy

(B) Dislocation

(C) Grain boundary

(D) Inclusion

(Ans: C)

 

In sand casting, fluidity of the molten metal increases with

(A) increase in degree of superheat

(B) decrease in pouring rate

(C) increase in thermal conductivity of the mould

(D) increase in sand grain size

(Ans: A)

 

Which of the following casting processes uses expendable pattern and expendable mould?

(A) Shell mould casting

(B) Investment casting

(C) Pressure die casting

(D) Centrifugal casting

(Ans: B)

 

Which of the following welding processes results in the smallest heat affected zone?

(A) Shielded metal arc welding

(B) Gas welding

(C) Laser beam welding

(D) Thermit welding

(Ans: C)

 

In resistance seam welding, the electrode is in the form of a

(A) cylinder

(B) flat plate

(C) coil of wire

(D) circular disc

(Ans: D)

 

Which of the following powder production methods produces spongy and porous particles?

(A) Atomization

(B) Reduction of metal oxides

(C) Electrolytic deposition

(D) Pulverization

(Ans: B)

 

The binding material used in cemented carbide cutting tools is

(A) graphite

(B) tungsten

(C) nickel

(D) cobalt

(Ans: D)

 

Grinding ratio is defined as

(A) volume of wheel wear / volume of work material removed

(B) volume of work material removed / volume of wheel wear

(C) cutting Speed / feed

(D) longitudinal feed / transverse feed

 

The best wire size (in mm) for measuring effective diameter of a metric thread (included angle is 60°) of 20 mm diameter and 2.5 mm pitch using two wire method is

(A) 1.443

(B) 0.723

(C) 2.886

(D) 2.086

(Ans: A)

 

The number of defectives produced by a six sigma process (in parts per million) is

(A) 5.2

(B) 4.2

(C) 3.2

(D) 2.2

(Ans: C)

 

A manufacturing cell has 5 machines A, B, C, D and E. The average cycle time (in minutes) for a job on each of the machines is given in the following table:

Machine A B C D E
Average cycle time 5 6 5.5 4 4.5

There are three operators in the cell. First operator operates machines A and B. The second operator operates machine C and the third operator operates machines D and E. All the jobs have to move in the following sequence:

A → B → C → D → E

Assuming the job transfer time between two machines to be negligible, the average cycle time (in minutes) for the manufacturing cell is

(A) 5.0

(B) 11.0

(C) 11.5

(D) 4.0

 

For a simple moving average forecasting method, as the length of averaging period increases, the forecast sensitivity

(A) increases

(B) decreases

(C) remains constant

(D) cannot be predicted

(Ans: B)

 

A dedicated machine receives jobs at a rate of 20 per hour and the processing rate of the machine is 30 jobs per hour. Assume the following:

(i) inter-arrival time and processing time for jobs follow exponential distributions

(ii) queue discipline is first-come-first-served (FCFS)

(iii) queue capacity and job population are infinite

For how much time (in minutes), on an average, does a job have to wait before it gets loaded on to the machine?

(A) 4

(B) 3

(C) 5

(D) 6

(Ans: A)

 

A system that acquires knowledge, creates a knowledge base and applies a large but standard set of probability based rules to make a decision in a specific problem setting, is termed as

(A) an expert system

(B) a management information system

(C) a database management system

(D) a probabilistic assessment system

(Ans: A)

 

Which one of the following is NOT a method of calculating depreciation?

(A) Straight line method

(B) Sum of year digits (SYD) method

(C) Declining balance method

(D) Net present value method

(Ans: D)

 

In a value analysis exercise, the cost of a product has come down by 20 % without any change in its quality. The product value has improved by

(A) 15 %

(B) 20 %

(C) 25 %

(D) 30 %

(Ans: C)

 

It is proposed to conduct a work sampling study of workers in a machine shop. Which of the following information would be necessary to determine the number of observations?

(A) Confidence level only

(B) Accuracy only

(C) Both confidence level and accuracy

(D) Rating factor

(Ans: C)