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Automobile Engineering MCQ Questions & Answers | Mechanical Engineering

Learn Automobile Engineering MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Automobile Engineering MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-3 section-1

Each section contains 100 MCQs on Automobile Engineering .
21
In Diesel engines, during suction stroke, _________ is drawn in the cylinder.
Discuss
Answer & Solution
Answer: Option C
Solution:
In Diesel engines, during suction stroke only air is drawn in the cylinder.
22
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is
Discuss
Answer & Solution
Answer: Option C
Solution:
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is Lubrication performance
23
Damper is also known as
Discuss
Answer & Solution
Answer: Option A
Solution:
A damper is a device that deadens, restrains, or depresses. Damper may refer to Dashpot which is a type of hydraulic or mechanical damper, Shock absorber .
It is a mechanical device designed to dissipate kinetic energy.
24
The valve overlap in four stroke petrol engines is approximately
Discuss
Answer & Solution
Answer: Option A
Solution:
The valve overlap in four stroke petrol engines is approximately at 30°
25
The coefficient of friction for the clutch facing is approximately
Discuss
Answer & Solution
Answer: Option B
Solution:
The coefficient of friction for the clutch facing is approximately 0.4
26
The oil pump is driven by the
Discuss
Answer & Solution
Answer: Option D
Solution:
In most engines the oil pump is driven by a gear attached to the crankshaft.
This is no always a direct drive, sometimes on older engines, the pump was driven by the camshaft gears or even the idler gear.
27
Which of the following oil is more viscous?
Discuss
Answer & Solution
Answer: Option D
Solution:
SAE stands for Society of Automobile Engineers and they standardise a lot of components that are used to build an automobile.
From Pipes to electronics to oils.
As for SAE 80 is more viscous
28
Which of the following indicates multi-grade oil?
Discuss
Answer & Solution
Answer: Option C
Solution:
SAE20 W50 indicates multi-grade oil
29
One effect of detonation is
Discuss
Answer & Solution
Answer: Option B
Solution:
When detonation occurs, the fuel charge ignites quickly in an uncontrolled explosion, causing a pounding or hammering force on the piston rather than a steady push.
Moderate to severe detonation could be noticed as engine roughness, vibration or loss of power and eventually engine damage.
30
The main cause for the change in engine oil viscosity is
Discuss
Answer & Solution
Answer: Option B
Solution:
The high temperatures can sheer/crack the oil molecules into smaller molecules, which causes a decrease in viscosity.