Inspector of Factories • Paper-III
TTT diagram indicates time and temperature transformation of -
A)
Cementite
B)
Pearlite
C)
Ferrite
D)
Austenite
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Ferrite' (Option C).
Inspector of Factories • Paper-III
Routing in production planning and control refers to the
A)
Balancing of load on machines
B)
Authorization of work to be performed
C)
Progress of work performed
D)
Sequence of operations to be performed
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Balancing of load on machines' (Option A).
Inspector of Factories • Paper-III
Decreasing grain size in a polycrystalline material -
A)
Increases yield strength and corrosion resistance
B)
Decreases yield strength and corrosion resistance
C)
Decreases yield strength but increases corrosion resistance
D)
Increases yield strength but decreases corrosion resistance
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Decreases yield strength and corrosion resistance' (Option B).
Inspector of Factories • Paper-III
When the temperature of a solid metal increases,
A)
Strength of the metal decreases but ductility increases
B)
Both strength and ductility of the metal decrease
C)
Both strength and ductility of the metal increase
D)
Strength of the metal increases but ductility decreases
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Strength of the metal decreases but ductility increases' (Option A).
Inspector of Factories • Paper-III
The atomic number of an atom is equal to -
A)
atomic weight
B)
atomic mass
C)
number of protons
D)
mass number
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'number of protons' (Option C).
Inspector of Factories • Paper-III
Thrust force will increase with the increase in -
A)
side cutting edge angle
B)
tool nose radius
C)
rake angle
D)
end cutting edge angle
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'tool nose radius' (Option B).
Inspector of Factories • Paper-III
Last year, a manufacturer produced 15000 products which were sold for Rs. 300 each. At that volume, the fixed costs were Rs. 15.2 lacs and total variable costs were Rs. 21 lacs. The break even quantity of product would be:
A)
4000
B)
7800
C)
8400
D)
9500
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '8400' (Option C).
Inspector of Factories • Paper-III
The coordination number for FCC crystal structure is -
A)
4
B)
8
C)
12
D)
16
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '12' (Option C).
Inspector of Factories • Paper-III
The complete phase recrystallization and fine grain structure is obtained in casting, forging and rolled parts by:
A)
Recrystallization annealing
B)
Normalizing
C)
Spheroidizing
D)
Austenising
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Spheroidizing' (Option C).
Inspector of Factories • Paper-III
The iron-carbon diagram and the TTT curves are determined under -
A)
Equilibrium and non-equilibrium conditions respectively
B)
Non-equilibrium and equilibrium conditions respectively
C)
Equilibrium conditions for both
D)
Non-equilibrium conditions for both
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Non-equilibrium and equilibrium conditions respectively' (Option B).
Inspector of Factories • Paper-III
Cold working of steel is defined as working -
A)
at its recrystallisation temperature
B)
above its recrystallisation temperature
C)
below its recrystallisation temperature
D)
at two thirds of the melting temperature of the metal
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'above its recrystallisation temperature' (Option B).
Inspector of Factories • Paper-III
In orthogonal cutting, shear angle is the angle between -
A)
shear plane and the cutting velocity
B)
shear plane and the rake plane
C)
shear plane and the vertical direction
D)
shear plane and the direction of elongation of crystals in the chip
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'shear plane and the rake plane' (Option B).
Inspector of Factories • Paper-III
Which one of the following methods can be used for forecasting the sales potential of a new product?
A)
Time series analysis
B)
Jury of executive opinion method
C)
Sales force composite method
D)
Direct survey method
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Time series analysis' (Option A).
Inspector of Factories • Paper-III
Which one of the following statements is not correct for the exponential smoothing method of demand forecasting?
A)
Demand for the most recent data is given more weightage
B)
This method requires only the current demand and forecast demand
C)
This method assigns weight to all the previous data
D)
This method gives equal weightage to all the periods
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Demand for the most recent data is given more weightage' (Option A).
Inspector of Factories • Paper-III
Earliest finish time can be regarded as -
A)
EST + duration of activity
B)
EST – duration of activity
C)
LFT + duration of activity
D)
LFT – duration of activity
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'EST – duration of activity' (Option B).
Inspector of Factories • Paper-III
The straight grades of cemented carbide cutting tool materials contain -
A)
Tungsten carbide only
B)
Tungsten carbide and titanium carbide
C)
Tungsten carbide and cobalt
D)
Tungsten carbide and cobalt carbide
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Tungsten carbide only' (Option A).
Inspector of Factories • Paper-III
With the increase of percentage of carbon in the steel, which one of the following properties does increase?
A)
Modulus of elasticity
B)
Ductility
C)
Toughness
D)
Hardness
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Modulus of elasticity' (Option A).
Inspector of Factories • Paper-III
The project activities, precedence relationships and durations are described in the table. The critical path of the project is:
Activity P: Precedence -, Duration 3
Activity Q: Precedence -, Duration 4
Activity R: Precedence P, Duration 5
Activity S: Precedence Q, Duration 5
Activity T: Precedence R, S, Duration 7
Activity U: Precedence R, S, Duration 5
Activity V: Precedence T, Duration 2
Activity W: Precedence U, Duration 10
A)
P-R-T-V
B)
Q-S-T-V
C)
P-R-U-W
D)
Q-S-U-W
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'P-R-U-W' (Option C).
Inspector of Factories • Paper-III
As the cutting speed increases -
A)
more heat is transmitted to the workpiece and less heat is transmitted to the tool
B)
more heat is carried away by the chip and less heat is transmitted to the tool
C)
more heat is transmitted to both the chip and the tool
D)
more heat is transmitted to both the workpiece and the tool
Based on established principles in the relevant subject area, the correct and most appropriate choice is 'more heat is transmitted to the workpiece and less heat is transmitted to the tool' (Option A).
Inspector of Factories • Paper-III
If orders are placed once a month to meet an annual demand of 6,000 units, then the average inventory would be:
A)
200
B)
250
C)
300
D)
500
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '500' (Option D).
Inspector of Factories • Paper-III
Which of the following is the measure of forecast error?
A)
Mean absolute deviation
B)
Trend value
C)
Moving average
D)
Price fluctuation
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Mean absolute deviation' (Option A).
Inspector of Factories • Paper-III
The blank diameter used in thread rolling will be -
A)
equal to minor diameter of the thread
B)
equal to pitch diameter of the thread
C)
a little large than the minor diameter of the thread
D)
a little larger than the pitch diameter of the thread
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'a little larger than the pitch diameter of the thread' (Option D).
Inspector of Factories • Paper-III
In ASA System, if the tool nomenclature is 8-6-5-5-10-15-2-mm, then the side rake angle will be -
A)
5°
B)
6°
C)
8°
D)
10°
Based on established principles in the relevant subject area, the correct and most appropriate choice is '6°' (Option B).
Inspector of Factories • Paper-III
Eutectic reaction for iron-carbon system occurs at -
A)
600°C
B)
723°C
C)
1147°C
D)
1493°C
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '600°C' (Option A).
Inspector of Factories • Paper-III
Magnesium is extruded and not rolled because -
A)
It has a low melting point
B)
It has a low density
C)
Its reactivity with roll material is high
D)
It has a dose-packed hexagonal structure
Based on established principles in Mechanical Engineering, the correct and most appropriate choice is 'Its reactivity with roll material is high' (Option C).
