MCQ on Manufacturing managementMCQ on Manufacturing processes

GATE – Multiple Choice Questions –Production and Industrial Engineering

GATE – 2012 – Production and Industrial Engineering

 

For a long slender column of uniform cross section, the ratio of critical buckling load for the case with both ends clamped to the case with both ends hinged is

(A) 1

(B) 2

(C) 4

(D) 8

(Ans: C)

 

A thin walled spherical shell is subjected to an internal pressure. If the radius of the shell is increased by 1% and the thickness is reduced by 1%, with the internal pressure remaining the same, the percentage change in the circumferential (hoop) stress is

(A) 0

(B) 1

(C) 1.08

(D) 2.02

(Ans: D)

 

A cantilever beam of length L is subjected to a moment M at the free end. The moment of inertia of the beam cross section about the neutral axis is I and the Young’s modulus is E. The magnitude of the maximum deflection is

(A) ML2 / 2EI

(B) ML2 / EI

(C) 2ML2 / EI

(D) 4ML2 / EI

(Ans: A)

 

A circular solid disc of uniform thickness 20 mm, radius 200 mm and mass 20 kg, is used as a flywheel. If it rotates at 600 rpm, the kinetic energy of the flywheel, in Joules is

(A) 395

(B) 790

(C) 1580

(D) 3160

(Ans: B)

 

Steam enters an adiabatic turbine operating at steady state with an enthalpy of 3251.0 kJ/kg and leaves as a saturated mixture at 15 kPa with quality (dryness fraction) 0.9. The enthalpies of the saturated liquid and vapor at 15 kPa are hf = 225.94 kJ/kg and hg = 2598.3kJ/kg respectively. The mass flow rate of steam is 10 kg/s. Kinetic and potential energy changes are negligible. The power output of the turbine in MW is

(A) 6.5

(B) 8.9

(C) 9.1

(D) 27.0

(Ans: B)

 

An ideal gas of mass m and temperature T1 undergoes a reversible isothermal process from an initial pressure P1 to final pressure P2. The heat loss during the process is Q. The entropy change ΔS of the gas is

(A) mRln(P2/P1)

(B) mRln(P1/P2)

(C) mRln(P2/P1) – Q/T1

(D) Zero

(Ans: B)

 

For an opaque surface, the absorptivity (α), transmissivity (τ) and reflectivity (ρ) are related by the equation:

(A) α + ρ = τ

(B) α + ρ + τ = 0

(C) α + ρ = 1

(D) α + ρ = 0

 (Ans: C)

 

Which one of the following configurations has the highest fin effectiveness?

(A) Thin, closely spaced fins

(B) Thin, widely spaced fins

(C) Thick, widely spaced fins

(D) Thick, closely spaced fins

(Ans: A)

 

Oil flows through a 200 mm diameter horizontal cast iron pipe (friction factor, f = 0.0225) of length 500 m. The volumetric flow rate is 0.2m3/s. The head loss (in m) due to friction is (assume g = 9.81 m/s2)

(A) 116.18

(B) 0.116

(C) 18.22

(D) 232.36

(Ans: A)

 

Match the following metal forming processes with their associated stresses in the workpiece.

Metal forming process Type of stress
1. Coining P. Tensile
2. Wire Drawing Q. Shear
3. Blanking R. Tensile and compressive
4. Deep Drawing S. Compressive

(A) 1-S, 2-P, 3-Q, 4-R

(B) 1-S, 2-P, 3-R, 4-Q

(C) 1-P, 2-Q, 3-S, 4-R

(D) 1-P, 2-R, 3-Q, 4-S

(Ans: A)

 

During normalizing process of steel, the specimen is heated

(A) between the upper and lower critical temperature and cooled in still air.

(B) above the upper critical temperature and cooled in furnace.

(C) above the upper critical temperature and cooled in still air.

(D) between the upper and lower critical temperature and cooled in furnace.

(Ans: C)

 

In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate

(A) increases continuously.

(B) decreases continuously.

(C) decreases, becomes stable and then increases.

(D) increases, becomes stable and then decreases.

(Ans: D)

 

Which one of the following is NOT a decision taken during the aggregate production planning stage?

(A) Scheduling of machines

(B) Amount of labour to be committed

(C) Rate at which production should happen

(D) Inventory to be carried forward

(Ans: A)

 

Which one of the following is NOT associated with the process of new product development?

(A) QFD

(B) FEMA

(C) KANBAN

(D) DFMA

 

A process needs to be standardized for method and time. Which one of the following represents the sequence of work study experiments?

(A) Time study followed by method study

(B) Only time study

(C) Time study and method study simultaneously

(D) Method study followed by time study

(Ans: D)

 

Reduction in the variability of manufactured product characteristics will definitely result in observations close to

(A) the upper control limit in X bar chart.

(B) the lower control limit in X bar chart.

(C) the lower control limit in R chart.

(D) the center line in R chart.

(Ans: C)