Automobile Engineering Interview Questions – Answers
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Automobile Engineering Interview Questions – Answers
Automobile Engineering Interview Questions answers
1.What is actual power delivered by the engine known as?
Ans- Answer: C
a) Shaft power
b) Horse – power
c) Brake power
d) None of the mentioned
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automobile engineering interview questions and answers 2023
2.If ‘T’ is torque (in Nm) and ‘N’ is speed (in rpm) then the required expression for Brake power ‘B.P’ in kW s is-
Ans- b
a) 2πNT/6000
b) 2πNT/60000
c) πNT/6000
d) πNT/60000
Automobile Engineering Interview Questions – Answers
3. The torque available at the contact between road and driving wheel is called
Ans- c
a) Brake power
b) Friction power
c) Tractive effort
d) Engine torque
4. If ‘V’ is vehicle speed (in metres/min) and ‘R’ is radius of driving wheel (in meters) then the rpm of the driving wheel is given by. you explain
automobile engineering interview questions and answers pdf
Ans- a
a) rpm = V/2πR
b) rpm = 2πV/R
c) rpm = πR/V
d) rpm = πV/R
5. Which of these is not a power loss which takes place between engine and driving wheel
Ans- d
a) Power loss due to friction of piston bearings and gears
b) Power loss from clutch to drive wheel due to friction of various parts
c) Transmission line loss
d) None of the mentioned
automobile engineering interview questions and answers
6.The force that opposes the motion of a vehicle is
Ans- d
a) Rolling resistance
b) Gradient resistance
c) Wind or air resistance
d) All of the mentioned
7. Rolling resistance does not depend on which of the following factors
Ans- b
a) Load on each road wheel
b) Radius of driving wheel
c) Wheel inflation pressure
d) Nature of road surface
8. For an average type of road surface what percentage of vehicle’s weight constitutes rolling resistance
Ans- b
a) 5 to 10%
b) 1 to 2%
c) 2 to 5%
d) 0 to 3%
Automobile Engineering Interview Questions answers
Automobile Engineering Interview Questions answers 2023
9. Wind or air resistance depends on which of the following factors
Ans- d
a) Shape and size of vehicle body
b) Air velocity
c) Speed of vehicle
d) All of the mentioned
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Automobile Engineering Interview Questions answers
10. If ‘k’ is coefficient of air resistance, ‘A’ is frontal area projected by the vehicle in square meters and ‘V’ is vehicle speed (in km/h) then the expression for air resistance ‘A.R’ on the vehicle is
Ans- a
a) A.R = kAV^2
b) A.R = kAV^3
c) A.R = 2kAV
d) A.R = kAV
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11. The value of coefficient of air resistance for average cars is approximately equal to
Ans- c
a) 0.32
b) 0.032
c) 0.0032
d) 1.32
automobile engineering interview questions and answers pdf
12. One Horse -Power (H.P) is approximately equal to _ Watts.
Ans- d
a) 810
b) 545
c) 634
d) 746
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13. Gradient resistance for a vehicle depends on which of the following factors
Ans- a
a) Weight of the vehicle
b) Size of the vehicle
c) Width of tyre
d) Speed of the vehicle
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14. Power to weight ratio for high performance cars can range up-to
Ans- c
a) 150
b) 190
c) 230
d) 280
15. What are the types of frames?
- Ladder type frame
- Perimeter type frame
- X type frame
- Backbone type frame
16. What is meant by self-propelled vehicle?
A self propelled vehicle is known as an “Automobile”
17. List the various manufacturers of automobile products in India.
- Maruti, Hyundai, Nissan, Ford – Passenger Vehicles
- Tata, Ashok Leyland – Heavy Commercial Vehicles
- Bajaj, Hero Honda, TVS Suzuki – Two Wheelers
- Bajaj, Mahindra – Three Wheelers
- State the major types of automobiles according to the fuel used.
- Petrol Engines (SI engine
- Diesel Engines (CI engines
- Gas Engines (either SI or CI mode)
What are the top questions asked in Automobile Engineering interview?
- Classify automobiles with respect to the drive of the vehicle.
- Front wheel drive
- Rear wheel drive
- All four wheel drive
- Left hand drive
- Right hand drive
- What is meant by the term Chassis?
A complete vehicle without a body structure is known as Chassis. It comprises of basic structure, power unit, transmission system, controls and auxiliaries.
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- What is the function of piston, connecting rod, crank shaft and cylinder head?
- Piston – The piston assembly transfers the force from the power stroke to the crankshaft
- Connecting rod – converts reciprocating motion of piston into rotary motion of crankshaft
- Cylinder head – it acts as a top cover to the cylinder block. The valves are placed in the cylinder head in an overhead valve engine.
- What is the purpose of cooling system?
The purpose of cooling system is to cool the engine components in order to keep their temperature below certain limit and thereby avoiding excessive thermal stress in those components.
How should I prepare for a car interview?
- What is spark plug ?
Answer :- A spark plug is a device used in an internal
combustion engine that is, an engine that derives its power via
exploding gases inside a combustion chamber to ignite the airfuel mixture.Cars typically have four-stroke gasoline engines,
which means there are four strokes, or movements, to the
moving parts inside the engine per rotation. Inside each cylinder
is a piston, which moves up and down within the cylinder to
compress the gas for combustion, and pushes the exhaust gases
out after combustion.
The piston is operated by an arm that attaches to the crankshaft,
a shaft that extends through the bottom of the engine. The piston
goes up and down twice during each rotation, hence the four
strokes — up, down, up, down.
The spark plug is positioned at the top of the cylinder, where the
air-fuel ratio is compressed. The tip of the plug sits inside the
engine, recessed into the side of the cylinder wall. The other end
remains outside the engine and is attached to a wire that is also
attached to the distributor
Automobile Engineering Interview Questions – Answers
- What is Wankel engine ?
Answer : The Wankel engine is a type of internal combustion
engine using an eccentric rotary design to convert pressure into a
rotating motion instead of using reciprocating pistons . Its four-
stroke cycle takes place in a space between the inside of an oval-
like epitrochoid shaped housing and a rotor that is similar in
shape to Reuleaux triangle but with sides that are somewhat
flatter. The very compact Wankel engine delivers smooth high-
rpm power. It is commonly called a rotary engine , though this
name applies also to other completely different designs.
Automobile Engineering Interview Questions – Answers
- What Is Otto Cycle?
Answer : An Otto cycle is an idealized thermodynamic cycle
which describes the functioning of a typical spark ignition
reciprocating piston engine, the thermodynamic cycle most
commonly found in automobile engines.
The processes are described byProcess 1-2 is an isentropic
compression of the air as the piston moves from bottom dead
centre (BDC) to top dead center (TDC).
Process 2-3 is a constant-volume heat transfer to the air from an
external source while the piston is at top dead center. This
process is intended to represent the ignition of the fuel-air
mixture and the subsequent rapid burning.
Process 3-4 is an isentropic expansion (power stroke).
Process 4-1 completes the cycle by a constant-volume process in
which heat is rejected from the air while the piston is a bottom
dead center.
Automobile Engineering Interview
Automobile Engineering Interview Questions – Answers
- What is Governing Of I.C Engines?
Answer :- The process of providing any arrangement, which
will keep the engine speed constant (according to the changing
load conditions) is know as Governing of I.C Engines. There are
many types of methods for Governing of I.C Engines, yet few
are important types:
a. Hit and miss Governing.
b. Qualitative Governing.
c. Quantitative Governing.
d. Combination system of Governing.
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- During The Drive Torque, What Will Be The Weight
Shift?
Answer : In case of cars the torque is applied to the rear
wheels, thus limiting accelerator due to front wheel drive due to
weight transfer. This drive is bolted to the chassis of the car.
Modern manufacturers therefore design rear wheel drive to have
similar handling to front wheel drive wherever possible via
suspension tuning.
Automobile Engineering Interview Questions – Answers 2023
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