Arulmigu Meenakshi Amman College of Engineering
Vadamavandal-604410.
CH3311- Basic Mechanical Engineering
Laboratory
V.
U
m
Prepared by
ap
at
V.Umapathy,
hy
,
Prof. /Mech.
Pr
of
./
EC
N
ot
es
, Arulmigu Meenakshi Amman College of Engineering
Vadamavandal-604410.
Record Note Book
1 Name
2 Register No.
3 Year and Semester II & III
4 Branch and Section Chemical & A
5 Course code and Title CH3311-Basic Mechanical Engineering
Laboratory
6 Academic year 2025-2026
7 Date of Examination
Signature of the Staff Signature of the HOD
V.
U
m
ap
at
hy
,
Pr
of
Internal Examiner External Examiner
./
EC
N
ot
es
, CH3311- Basic Mechanical Engineering Laboratory
Content
Ex.No. Name Date Page Signature
No
1 Port timing diagram
2 Valve timing diagram
3 Study of Two stroke I C Engines
4 Study of Four stroke I C Engines
5 Load test on 4-stroke petrol engine
6 Performance test on 4-stroke single
cylinder diesel engine
7 Performance test on 4-stroke twin
cylinder diesel engine
8 Heat balance test on diesel engines
9 Tension test
10 Compression test
11 Deflection test
12 Hardness test (Rockwell and Brinell)
V.
U
m
13 Spring test
ap
at
14 Torsion test
hy
,Pr
15 Impact test
of
./
EC
N
ot
es
, S.No. Experiments
1 Port timing diagram
Aim:
The aim of the port timing diagram experiment is to draw the port timing diagram of a
given two-stroke cycle petrol engine. This involves identifying the opening and closing
positions of the inlet, transfer, and exhaust ports in relation to the piston's top dead center
(TDC) and bottom dead center (BDC) positions, and plotting these events on a diagram to
visualize the engine's operation.
Apparatus Required:
1. Two-stroke cycle petrol engine: The engine to be tested, which should be a two-stroke
engine with accessible ports.
2. Measuring instruments:
- Protractor or degree wheel
- Pointer or indicator to mark piston positions
3. Graph paper or plotting tools: For drawing the port timing diagrams.
Engine Details:
Circumference of the flywheel (ЛD) = 52 cm.
Rated Speed = 1500 rpm.
Formula:
Procedure:
V.
The procedure for the port timing diagram experiment involves measuring and plotting the
U
opening and closing timings of the inlet, transfer, and exhaust ports in a two-stroke engine
m
ap
relative to crank angle positions.
at
hy
Step-by-Step Explanation:
,
1. Prepare the engine: Use a two-stroke petrol engine with accessible ports.
Pr
of
2. Measure crank angles: Determine angles at which ports open and close relative to
./
EC
N
ot
es
Vadamavandal-604410.
CH3311- Basic Mechanical Engineering
Laboratory
V.
U
m
Prepared by
ap
at
V.Umapathy,
hy
,
Prof. /Mech.
Pr
of
./
EC
N
ot
es
, Arulmigu Meenakshi Amman College of Engineering
Vadamavandal-604410.
Record Note Book
1 Name
2 Register No.
3 Year and Semester II & III
4 Branch and Section Chemical & A
5 Course code and Title CH3311-Basic Mechanical Engineering
Laboratory
6 Academic year 2025-2026
7 Date of Examination
Signature of the Staff Signature of the HOD
V.
U
m
ap
at
hy
,
Pr
of
Internal Examiner External Examiner
./
EC
N
ot
es
, CH3311- Basic Mechanical Engineering Laboratory
Content
Ex.No. Name Date Page Signature
No
1 Port timing diagram
2 Valve timing diagram
3 Study of Two stroke I C Engines
4 Study of Four stroke I C Engines
5 Load test on 4-stroke petrol engine
6 Performance test on 4-stroke single
cylinder diesel engine
7 Performance test on 4-stroke twin
cylinder diesel engine
8 Heat balance test on diesel engines
9 Tension test
10 Compression test
11 Deflection test
12 Hardness test (Rockwell and Brinell)
V.
U
m
13 Spring test
ap
at
14 Torsion test
hy
,Pr
15 Impact test
of
./
EC
N
ot
es
, S.No. Experiments
1 Port timing diagram
Aim:
The aim of the port timing diagram experiment is to draw the port timing diagram of a
given two-stroke cycle petrol engine. This involves identifying the opening and closing
positions of the inlet, transfer, and exhaust ports in relation to the piston's top dead center
(TDC) and bottom dead center (BDC) positions, and plotting these events on a diagram to
visualize the engine's operation.
Apparatus Required:
1. Two-stroke cycle petrol engine: The engine to be tested, which should be a two-stroke
engine with accessible ports.
2. Measuring instruments:
- Protractor or degree wheel
- Pointer or indicator to mark piston positions
3. Graph paper or plotting tools: For drawing the port timing diagrams.
Engine Details:
Circumference of the flywheel (ЛD) = 52 cm.
Rated Speed = 1500 rpm.
Formula:
Procedure:
V.
The procedure for the port timing diagram experiment involves measuring and plotting the
U
opening and closing timings of the inlet, transfer, and exhaust ports in a two-stroke engine
m
ap
relative to crank angle positions.
at
hy
Step-by-Step Explanation:
,
1. Prepare the engine: Use a two-stroke petrol engine with accessible ports.
Pr
of
2. Measure crank angles: Determine angles at which ports open and close relative to
./
EC
N
ot
es
