Inspector of Factories • Paper-III
In a transportation problem North-West corner rule would yield
A)
An optimum solution
B)
An initial feasible solution
C)
A Vogel’s approximate solution
D)
A minimum cost solution
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'A Vogel’s approximate solution' (Option C).
Inspector of Factories • Paper-III
Which of the following statement is true about brittle fracture?
A)
High temperature and low strain rates favour brittle fracture
B)
Many metal with HCP crystal structure commonly show brittle fracture
C)
Brittle fracture is always preceded by noise
D)
Cup and cone formation is characteristic for brittle materials
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'High temperature and low strain rates favour brittle fracture' (Option A).
Inspector of Factories • Paper-III
In which of the following phases of steel cementite is in particle form?
A)
Martensite
B)
Ferrite
C)
Pearlite
D)
Bainite
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Martensite' (Option A).
Inspector of Factories • Paper-III
When FCC iron and BCC iron coexist in equilibrium, the degrees of freedom are -
A)
1
B)
2
C)
3
D)
0
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '0' (Option D).
Inspector of Factories • Paper-III
Which of the following is a single point cutting tool?
A)
Hacksaw blade
B)
Milling cutter
C)
Grinding wheel
D)
Parting tool
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Grinding wheel' (Option C).
Inspector of Factories • Paper-III
A built-up-edge is formed while machining -
A)
ductile materials at high speed
B)
ductile materials at low speed
C)
brittle materials at high speed
D)
brittle materials at low speed
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'brittle materials at low speed' (Option D).
Inspector of Factories • Paper-III
Sharing of electrons between neighbouring atoms results in -
A)
metallic bond
B)
ionic bond
C)
covalent bond
D)
none of these
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'metallic bond' (Option A).
Inspector of Factories • Paper-III
The material property which depends only on the basic crystal structure is -
A)
Fatigue strength
B)
Work hardening
C)
Fracture strength
D)
Elastic constant
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Fatigue strength' (Option A).
Inspector of Factories • Paper-III
18/8 steel contains____________.
A)
18%Ni, 8%Cr
B)
18% Cr, 8% Ni
C)
18%Ni, 18%Cr
D)
None
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '18%Ni, 8%Cr' (Option A).
Inspector of Factories • Paper-III
There are two products P and Q with the following characteristics:
Product P: Demand 100, Order Cost 50, Holding Cost 4
Product Q: Demand 400, Order Cost 50, Holding Cost 1
The economic order quantity (EOQ) of products P and Q will be in the ratio -
A)
1: 1
B)
1: 2
C)
1: 4
D)
1: 8
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '1: 2' (Option B).
Inspector of Factories • Paper-III
A production line is said to be balanced when
A)
There are equal number of machines at each work station
B)
There are equal number of operators at each work station
C)
The waiting time for service at each station is the same
D)
The operation time at each station is the same
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'There are equal number of operators at each work station' (Option B).
Inspector of Factories • Paper-III
For sales forecasting, pooling of expert opinions is made use of in -
A)
Statistical correlation
B)
Delphi technique
C)
Moving average method
D)
Exponential smoothing
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Delphi technique' (Option B).
Inspector of Factories • Paper-III
Match the items in Column I and Column II.
Column I: P. Charpy test, Q. Knoop test, R. Spiral test, S. Cupping test
Column II: 1. Fluidity, 2. Micro hardness, 3. Formability, 4. Toughness, 5. Permeability
A)
P - 4, Q - 5, R - 3, S – 2
B)
P - 3, Q - 5, R - 1, S - 4
C)
P - 2, Q - 4, R - 3, S – 5
D)
P- 4, Q - 2, R - 1, S – 3
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'P - 4, Q - 5, R - 3, S – 2' (Option A).
Inspector of Factories • Paper-III
Crater wear on tools always starts at some distance from the tool tip because at that point -
A)
cutting fluid does not penetrate
B)
normal stress on rake face is maximum
C)
temperature is maximum
D)
tool strength is minimum
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'normal stress on rake face is maximum' (Option B).
Inspector of Factories • Paper-III
Which one of the following processes does not cause tool wear?
A)
Ultrasonic machining
B)
Electrochemical machining
C)
Electric discharge machining
D)
Anode mechanical machining
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Electric discharge machining' (Option C).
Inspector of Factories • Paper-III
The melting point of wrought iron is about____________.
A)
1530°C
B)
530°C
C)
1539°C
D)
None
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'nan' (Option D).
Inspector of Factories • Paper-III
In PERT analysis a critical activity has -
A)
Maximum Float
B)
Zero Float
C)
Maximum Cost
D)
Minimum Cost
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Maximum Cost' (Option C).
Inspector of Factories • Paper-III
If the number of arrivals in a queue follows the Poisson distribution, then the inner arrival time obeys which one of the following distributions?
A)
Poisson’s distribution
B)
Negative exponential law
C)
Normal distribution
D)
Binomial
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Normal distribution' (Option C).
Inspector of Factories • Paper-III
Which one of the following is the process to refine the grains of metal after it has been distorted by hammering or cold working?
A)
Annealing
B)
Softening
C)
Re-crystallizing
D)
Normalizing
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Softening' (Option B).
Inspector of Factories • Paper-III
Flank wear occurs mainly on which of the following?
A)
Nose part and top face
B)
Cutting edge only
C)
Nose part, front relief face, and side relief face of the cutting tool
D)
Face of the cutting tool at a short distance from the cutting edge
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Face of the cutting tool at a short distance from the cutting edge' (Option D).
Inspector of Factories • Paper-III
Which one of the following sets of constituents is expected in equilibrium cooling of a hypereutectoid steel from austenitic state?
A)
Ferrite and pearlite
B)
Cementite and pearlite
C)
Ferrite and bainite
D)
Cementite and martensite
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Cementite and martensite' (Option D).
Inspector of Factories • Paper-III
In metals subjected to cold working, strain hardening effect is due to -
A)
slip mechanism
B)
twining mechanism
C)
dislocation mechanism
D)
fracture mechanism
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'slip mechanism' (Option A).
Inspector of Factories • Paper-III
Which one of the following is the correct ascending order of packing density for the given crystal structures of metals?
A)
Simple cubic – Face centred cubic – Body centred cubic
B)
Body centred cubic - Simple cubic - Face centred cubic
C)
Simple cubic - Body centred cubic - Face centred cubic
D)
Body centred cubic - Face centred cubic - Simple cubic
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Simple cubic – Face centred cubic – Body centred cubic' (Option A).
Inspector of Factories • Paper-III
Match List-I (Crystal Structure) with List-II (Example) and select the correct answer using the codes given below the Lists:
List-I: A. Simple Cubic, B. Body-centered Cubic, C. Face-centered Cubic, D. Hexagonal Close Packed
List-II: 1. Zinc, 2. Copper, 3. Alpha iron at room temperature, 4. Manganese
A)
4 3 1 2
B)
4 3 2 1
C)
3 4 2 1
D)
3 4 1 2
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '4 3 1 2' (Option A).
Inspector of Factories • Paper-III
A measure of Rockwell hardness is the -
A)
Depth of penetration of indenter
B)
Surface area of indentation
C)
Projected area of indentation
D)
Height of rebound
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Height of rebound' (Option D).
