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WorksheetsAutomobile Engineering by Prof. Om Prakash Satyam
Total questions: 47
Worksheet time: 24mins
In a four-stroke engine each cylinder has
One valve
Two valves
Three valves
Four valves
The motion of the cam is transferred to the valves through
Pistons
Rocker Arm
Cam shaft Pulley
Valve stems
What type of bearing is used for main bearings and connecting rod bearings?
Ball bearings
Plain bearings
Needle roller bearing
Taper roller bearing
Which of the following energy conversion devices convert heat into work?
Electrical generators
I. C engines
Condensers
All of the above
What is meant by gear ratio?
The ratio of pinion speed and gear speed
The ratio of number of teeth on pinion and number of teeth on gear
Both a. and b
None of the above
Deformation per unit length is called as ________
strain
stress
Modulus of Elasticity
None of the above
Diesel fuel, compared to petrol is
less difficult to ignite
just about the same difficult to ignite
more difficult to ignite
highly ignitable
The- most efficient method of compressing air is to compress it
Isothermally
Adiabatically
Isentropically
Isochronically
Ratio of indicated H.P. and brake H.P. is known as
Mechanical efficiency
Volumetric efficiency
Thermal efficiency
Relative efficiency
The torque available at the contact between driving wheels and road is known as
brake effort
tractive effort
Clutch effort
None of these
Which of the following is not an automobile?
Motor cycle
passenger car
Aeroplane
Truck
The purpose of transmission in an automobile is
to vary the speed of automobile
to vary the torque at the wheels
to vary the power of automobile
None of the above
चित्र मे दिखाये गये गिअर का प्रकार बताईये ?
हेलीकल गिअर
बीवेल गिअर
स्पायरल बीवेल गिअर
उपर मे से कोई भी नही
identify the transmission layout for the vehicle shown in the image
2 wheel drive
four wheel drive
fwd
rwd
Hydraulics uses what as its non-compressible medium
Air
Water
Oil
Grass
Car engines are usually
single cyliner type
twin- cylinder type
4 cylinder in-line type
4 cylinder v type
The power required to propel the vehicle is supplied by -----
engine
shaft
gear
clutch
In a four stroke engine each cylinder has
One valve
Two valves
Three valves
Four valves
If there are 7 clutch plates in a multi-plate clutch, what is the number of pair of contact surfaces?
5
4
6
8
Where is the clutch located?
Between transmission and engine
Between transmission and rear axle
Between transmission and propeller shaft
Between transmission and differential
Which of the following is the need of the gearbox?
a) To vary the speed of the vehicle
b) To vary the torque of the vehicle
c) To vary the power of the vehicle
d) To vary the acceleration of the vehicle
Connecting rod is attached to the piston by the
a) Rod cap
b) Piston pin
c) Cap bolt
d) Lower cap
The material used for cylinder block are
Cast iron and Steel
Cast iron and Aluminium Alloy
Steel and Aluminium Alloy
Brass and Steel
Significance of lubrication
Reduces friction
Increases wear
Increases heat
Stops the moving parts
Intake of air and fuel mixture enters from
Spark plug
Valve
Tube
Wheel
The function of induction system of spark ignition engine is to supply ______ to various cylinders of the engine
Partly vaporized mixture of fuel and air
Fully vaporized mixture of fuel and air
Liquified mixture of fuel and air
All of the above
The following factors affect the process of carburetion
Engine speed
The temperature of the incoming air
The volatility of fuel
All of the above
Which of the following air-fuel ratio is considered as rich mixture in spark ignition engine?
Below 11:1
Below 15:1
Below 20:1
Above 20:1
At high altitudes, the automobile requires
Rich mixture
Lean mixture
Correct mixture
Any of the above
MPFI stands for
Multi-point fuel injection
Multi-port fuel injection
Manifold point fuel injection
Manifold port fuel injection
Which of the following is the part of Electronic Control Unit (ECU)
Injector control
Spark advance control
Idling control
All of the above
In battery-coil ignition system, the correct sequence of flow of current is
Battery – Ammeter – Ignition coil - Distributor – Spark plug
Battery – Ignition coil – Ammeter - Distributor – Spark plug
Battery – Ammeter – Distributor - Ignition coil – Spark plug
Battery – Distributor – Ammeter - Ignition coil – Spark plug
The distributor serves the following purposes in the ignition system
It operates break and make mechanism
It distributes high tension current to spark plug at correct time
Both a and b
None of the above
In magneto ignition system
No battery is required
Engine starting is rather difficult
Used in high speed engines
All of the above
The following is known as ‘Breakerless ignition system’
Battery coil ignition system
Magneto ignition system
Electronic ignition system
Capacitive discharge ignition system
Which of the following is not the function of the fuel injection system?
Time the fuel injection
Filter the fuel
Atomize the fuel to fine particles
Control the engine speed
The requirements met by the injection system are
Proper atomization of fuel into very fine droplets
Proper spray pattern to ensure rapid mixing of fuel and air
Uniform distribution of fuel droplets throughout the combustion chamber
All of the mentioned
Turbochargers are generally
Centrifugal compressors
Reciprocating compressors
Vane blowers
Roots blower
Supercharging
Increases intake pressure
Increases intake temperature
Increases flame speed
All of the mentioned
Which of the following is one of the major exhaust emissions from CI engines compared to SI engines?
Oxides of nitrogen
Particulates
CO and CO2
Unburnt hydrocarbons
A catalytic is a substance that accelerates a chemical reaction by lowering the energy needed for it to proceed
True
False
A three way catalytic convertor
Re-circulates exhaust gases
Burns fuel vapour gases
Reduces N2, H20 and CO2 emission levels
Removes CO, HC and NO2 from the exhaust gases passing through it
A industry which designs, develops, manufactures, markets and sells motor vehicles is called ______________ industry.
cotton
automobile
text tile
automobele
fishing
fluids
liquids
evidence
getting
hurt
