APPSC Automobile Engineering 12 March 2020 Question Paper with Answers Key


APPSC Automobile Engineering 12 March 2020 Question paper with Answers Key- APPSC conducted Lecturers in Government Polytechnic Colleges exam on 12 March 2020 FN from 10.00 AM to 12.30 PM. Here we are providing some of the questions asked in APPSC Automobile Engineering Paper.

A thermodynamic isolated System is one which cannot Interchange?

Mass and Energy

Atmospheric Pressure head is equal to?

10.3 m of water

Impellers of a rotatory pump for high heads usually have?

Low Specific Speed

The fixed guide blades in a Centrifugal pump are used to?

Increase the Pressure energy

The Zeroth Law of Thermodynamics deals with?


Mist Lubrication System is used in a?

Two – Stroke Engine

Entropy of the System………..with the addition of heat?


The Actual Thermal efficiency of a cycle is ……… the air Standard efficiency?

Less than

The Normal range of Compression ratio for diesel cycle is?

16 to 25

Baffels are used in Shell and tube type of heat exchangers to?

Increase the heat transfer Coefficient

APPSC Automobile Engineering 12 March 2020 Paper

Fuel Injection in the CI engine at the end of?
Compression Stroke

Bronze in alloy of Copper and?


A Strain guage is rossete is used when?

Both magnitude and direction of Strains are unknown

Creampic Slip gauges are better than slip gauges due to its ?

Resistance to wear

The diameters of holes are checked for aggregable using a?

Plug Guage

In two wheelers, which Schavenging method is used?

Cross Schavenging

Nipping of leaf springs in a vehicle is to?

Keep Stress uniform in the Springs

Mention one of the type of Part in Chasis?


The Fuel Injection Pressure in a Diesel Engine in the range of?

100 to 170 atm

Cold rolled Carbon sheet Steel contains maximum Carbon of?


Automobile Engineering

APPSC Automobile Engineering 12 March 2020 Questions and answers

Spheroidising Treatment Improves?

Machinability of Mild Steels

The specific area of Solids is?

Surface area per unit mass

Alpha Iron-shows the space lattice of a?

Body – Centred cubic space lattice

Case hardening Process is suitable for?

Low carbon steel

Annealing of White Caste Iron Produces?

Malleable iron

When is a governor Considered as an isochronous?

When the range of speed is zero

What is the Frankel defect in the lattice Crystal?

Defect in which interstitial position is occupied by missing atoms

Austempering heat treatment Process is practiced to improve?


The material used for gas filled cartridge in a car bumper is ?


What is the Pitch Point in the Cams?

It is a point on the pitch Curve having the maximum pressure angle

APPSC Automobile Engineering 12 March 2020 paper with Key

What is a Unit of Force?


In a dynamic imbalance of a machine?

Both Centrifugal and couple need to be balanced

What defines the resonance in the system?

When natural frequency confides with that of the operating frequency of the system

In which applications is leaf springs mostly used?

In four wheelers

Which is not an example of Curved beams?

Cantilever beam with point load

In which part, is a spindle mounted on the spindle lathe?


Thermal Conductivity is the maximum for which Substance?


In general, heat transfer takes place according to the principle of?

Second law of thermodynamics

An example of heat transfer by Conduction, convection and radiation is / are?

Boiler Furnance

In case of fins, the values of the Biot number for effective function fins is?

Less than one

APPSC Automobile Engineering Answers Key 12 March 2020

The Velocity Parameters with in the given fields are the same when?

The Reynolds number are the same

Multistage Centrifugal Pumps with impellers in series are used to?

Increase the head of liquid

In case of completely submerged body, the resultant the pressure of liquid act on a point at?

Centre of Pressure

In reciprocating Pumps, the acdcelaration Pressure head is maximum at the?

Mid of the Stroke

A hydrolic fuse is Incorporated in the system for safety against?

Pressure of fluid

A thin and closed diaphragm element is used as a sensor while measuring?


A wheatstone bridge used for strain measurement using electrical strain gauges is sensitive  to changes in?


Transducers for the measurement of temperature make use of?

Change in resistivity

The guage factor of a semiconductor guage compared to a wire strain guage is?


Temperature Compensation can be achieved in strain guage circuits using?

A pair of strain guages

APPSC Automobile Engineering 12 March 2020 Full Question Paper & Key


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