Technical Interview
questions:
Q What happens if gasoline is used in a Diesel engine?Diesel engine will work ?
No, It will not work,as the Compression ratio of Petrol engine is 6 to 10 & that of Diesel engine is 15 to 22. Thus on such high compression, gasoline gets highly compressed & it may blast.
Q Which Mechanism is used in Automobile gearing system?
Differential mechanism
Q Why different types of sound are produced in different bikes though they say run on SI engine
Engine specifications are different in different manufactures like as Bore Diameter(CC), Ignition timing.Also the exhaust passage take more responsible for sound.
Q Why entropy decreases with the increase in temperature?
ds=dQ/TEntropy is inversely proportional to the temperature so.as temp. increases,entropy decreases.
Q 1 hp how much watt?
746.2Watt
Q How to calculate bearing number to diameter of the inner and outer?
Divide the shaft diameter size by 5, it will give last two digitof the bearing no. and according to type of load we have tochose the type of bearing and that will give prior no. ofthe bearing.
Q Explain Bicycle rear wheel Sprocket working?
Rear wheel sprocket works under the principle of ratchet and pawl.
Q What happens if gasoline is used in a Diesel engine?Diesel engine will work ?
No, It will not work,as the Compression ratio of Petrol engine is 6 to 10 & that of Diesel engine is 15 to 22. Thus on such high compression, gasoline gets highly compressed & it may blast.
Q Which Mechanism is used in Automobile gearing system?
Differential mechanism
Q Why different types of sound are produced in different bikes though they say run on SI engine
Engine specifications are different in different manufactures like as Bore Diameter(CC), Ignition timing.Also the exhaust passage take more responsible for sound.
Q Why entropy decreases with the increase in temperature?
ds=dQ/TEntropy is inversely proportional to the temperature so.as temp. increases,entropy decreases.
Q 1 hp how much watt?
746.2Watt
Q How to calculate bearing number to diameter of the inner and outer?
Divide the shaft diameter size by 5, it will give last two digitof the bearing no. and according to type of load we have tochose the type of bearing and that will give prior no. ofthe bearing.
Q Explain Bicycle rear wheel Sprocket working?
Rear wheel sprocket works under the principle of ratchet and pawl.
Comparison between AC and
DC welding:-
AC WELDING:-
1. Equipment is cheaper and simpler.
2. In AC transformer there is no moving part, therefore it is easy to maintain.
3. It can be operated at large distances from power sources as the voltage drop is negligible.
4. Only coated electrodes can be used in AC welding.
5. Less problem of arc blow.
6. It cam not be used for welding non-ferrous metals.
7. It can be used only when AC current is available.
DC WELDING:-
1. Equipment is costlier and complicated.
2. DC generator set has many parts moving and its maintenance cost is higher than AC transformers.
3. In DC the voltage drop is very high. Therefore shorter cables are used.
4. Both coated and bare electrods can be used.
5. More problem of arc blow.
6. Almost all the metals can be welded.
7. An engine generator can be used in case of non-availability of AC power.
AC WELDING:-
1. Equipment is cheaper and simpler.
2. In AC transformer there is no moving part, therefore it is easy to maintain.
3. It can be operated at large distances from power sources as the voltage drop is negligible.
4. Only coated electrodes can be used in AC welding.
5. Less problem of arc blow.
6. It cam not be used for welding non-ferrous metals.
7. It can be used only when AC current is available.
DC WELDING:-
1. Equipment is costlier and complicated.
2. DC generator set has many parts moving and its maintenance cost is higher than AC transformers.
3. In DC the voltage drop is very high. Therefore shorter cables are used.
4. Both coated and bare electrods can be used.
5. More problem of arc blow.
6. Almost all the metals can be welded.
7. An engine generator can be used in case of non-availability of AC power.
testing interview questions
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