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Browse complete papers___________ is used to measure the pressure difference in a Venturi meter.
Pitot tube
Manometer
Bourdon gauge
Rotameter
Correct answer
Pitot tube
Which of the following is a primary application of interferometry in metrology?
Calculating torque in shafts using sensors
Determining chemical composition by spectroscopy
Measuring surface flatness with high precision
Analyzing thermal conductivity of metals
Correct answer
Calculating torque in shafts using sensors
Corrosion resistance of alloy steels can be increased further by:
Increasing the overall carbon content in the alloy
Adding a small percentage of copper to the composition
Improving surface finish through mechanical polishing
Using protective coatings or chemical passivation treatment
Correct answer
Increasing the overall carbon content in the alloy
Which of the following best describes the principle of parkerising?
A phosphate layer forms by chemical reaction
Surface roughness is increased mechanically
A paint coating is applied to the surface
A polymer coating is sprayed on the surface
Correct answer
A phosphate layer forms by chemical reaction
Which two types of thermodynamic processes constitute the Carnot cycle in an ideal heat engine?
Adiabatic and isochoric
Isobaric and isochoric
Isothermal and adiabatic
Isothermal and isochoric
Correct answer
Adiabatic and isochoric
A hollow shaft has an outer diameter twice its inner diameter of a solid shaft, both constructed from the same material, and having identical outer diameters. The ratio of their torsional strength is:
\(\frac{15}{16}\)
\(\frac{5}{9}\)
\(\frac{13}{14}\)
\(\frac{2}{3}\)
Correct answer
\(\frac{15}{16}\)
Determine the gauge pressure given an absolute pressure of 2 atm and atmospheric pressure of 1 atm.
0.5 atm
1 atm
2 atm
3 atm
Correct answer
0.5 atm
A company manufactures a component at a variable cost of ₹40 per unit and incurs a fixed cost of ₹2,00,000 per year. An outside supplier offers the same component at ₹60 per unit. What should the company do if the annual demand is 12,000 units?
Continue manufacturing the component in-house as it is more cost-effective
Split production equally between manufacturing and outsourcing
Outsource production to the supplier as it saves more money
Reduce production and buy the remaining units from the supplier
Correct answer
Continue manufacturing the component in-house as it is more cost-effective
Which type of flux is most suitable for minimizing oxidation in high-temperature aluminum welding applications involving magnesium alloys?
Rosin-based flux
Fluoride-based flux
Zinc chloride-based flux
Borax-based flux
Correct answer
Rosin-based flux
Why is water mixed with oil often preferred as a grinding coolant over plain water?
It provides both cooling and lubrication
It makes coolant less effective
It increases corrosion of metals
It decreases grinding time significantly
Correct answer
It provides both cooling and lubrication