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Automobile Engineering MCQ - Multiple Choice Question and Answer

Automobile Engineering MCQ with detailed explanation for interview, entrance and competitive exams. Explanation are given for understanding.

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Question No : 1
The self ignition temperature of Diesel as compared to petrol is

Higher
Lower
Same
Depends on fuel quality

Question No : 2
The main characteristics of a maintenance free (MF) battery is that

A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
A maintenance free battery has a relatively short shelf life when compared with standard batteries
Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
Recharging of a maintenance free battery is neither required nor possible

Question No : 3
The positive plates of a lead acid battery has

Lead peroxide (PbO₂)
Spongy lead (Pb)
Lead sulphate (PbSO₄)
Sulphuric acid (H₂SO₄)

Question No : 4
What type of bearing is used for main bearings and connecting rod bearings?

Ball bearings
Plain bearings
Needle roller bearing
Taper roller bearing

Question No : 5
The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as

Honing
Porous plating
Boring
Shot peening

Question No : 6
The torque available at the contact between driving wheels and road is known as

Brake effort
Tractive effort
Clutch effort
None of these

Question No : 7
The valve overlap in four stroke petrol engines is approximately

30°
60°
90°
120°