Mechanical Quality Automobile And Production Engineering Questions

Quality Engineering Interview questions

Q. What instrument is used to measure the height of the product?

Ans. Height gauge is used to measure the height manually.

Q. What instrument is preferred to measure the internal diameter of a cylindrical pipe?

Ans. Vernier Caliper is used to measure the internal diameter of the hollow pipe.

Q. What is the difference between digital micrometer and ordinary micrometer?

Ans. Digital micrometer differ then the ordinary micrometer in the sense of accuracy. The accuracy of digital micrometer is 1 micron while the accuracy of ordinary micrometer is 10 micron.

Q. What is the tolerance of the digital micrometer?

Ans. 0.001

Q. What machine is used to measure the exact coordinate of the finished job up to 5 dimensional accuracy?

Ans. Coordinate Measuring Machine (CMM)

Q. What is the necessary process to be done before changing the probe of CMM.

Ans. This process is known as the calibration of the probe. It is done with the help of Master Probe.

Q. What is the basic unit of measurement used in almost all the manufacturing measurement process?

Ans. MM or millimeter

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Automobile Engineering Interview Questions

Q.1 Why exhaust pipe of an automobile is located behind the rear wheel? Can arrangements be made for it to be in the front portion of the automobile.What will be the problem then?

Ans. 1 A better technical application might be that if the exhaust pipe is placed in front then as the car moves forward, there is obstruction in the flow of exhaust gases and due to the back pressure the smoke flows back to the engine chamber, which would affect the mixture strength of the fuel making the air fuel lean mixture, as a result decreasing the performance of the engine.

2 If locate in front many affects are there smoke affect the inlet air,affect the driver.so locate in back it based on newton 3rd also.and prevent the many effects.to get many advantage

3 The silencer show be a lengthy one. If you place in front then there wont be any thermodynamically effect to the engine but there are commercial effects like your bike color will become fade by the carbon content, your respiration will effected and your bike style will look odd.

Q.2 When i take first gear in a bike firstly apply clutch why? And when speed of bike in running position you can't apply clutch why?

Ans. Because the clutch plate must be free from flywheel and power transmission stop so to use gear or changing of gear should be at this position and on running power transmission continuous, so never take clutch without down the accelerator.

Q.3 . What causes white smoke in two stroke locomotive engines?

Ans. That is the engine running too lean (lack of fuel). This condition will lead to overheating and failure of the engine.

Q.4 How does iron ore turn into steel?

Ans To make Steel, Iron Ore is refined into iron and all the carbon is burned away using very high heat (Bessemer). A percentage of Carbon (and other trace elements) are added back to make steel.

Q.5 When Clutch Pedal is pressed the engine rpm is ?

a.reduced

b.increases

c.constant.

Ans. Constant