Q. 1 Explain following machine Elements

Axle and shaft:

Open Belt Drive and cross belt drive:

Q. 2 Explain working of disc brake with simple sketch.

Q. 3 Explain construction and working of rigid flanged coupling.

Q. 4 Differentiate between machine and mechanism.

Q. 5 Explain steps involved in design process.

Define following properties:

i) Ductility ii) Malleability iii) Brittleness iv) Strength

v) Resilience vi) Elasticity vii) Hardness viii) Toughness

ix) Creep x) Fatigue xi) Plasticity

Q. 7 Draw neat sketch of sand casting process setup. State advantages, limitations and

engineering applications of the process.

Q. 8 Draw self explanatory diagrams of blanking, punching, piercing and drawing operations.

Q. 9 Explain hot forging process with neat sketch.

Q. 10 Draw block diagram of lathe machine and explain function of various parts.

Q. 11 Draw block diagram of radial drilling machine and explain tapping operation.

Tapping Operation:

Q. 12 With neat sketches explain surface grinding and cylindrical grinding operations.

Q. 13 Define thermodynamic system. Explain its types with example.

System, Surrounding & Boundary :• Thermodynamic system is defined

as a quantity of matter or region in

space chosen for study.

• Example- Classroom

• The mass or region outside the

system is called the Surroundings.

• System boundary is the real or

imaginary surface that separates the

system from the surrounding.

• E.g. Classroom walls.

• Boundary can be fixed or movable.

Thermodynamics Systems : Open system

➢ A system that involves mass & energy

transfer across its boundaries is called an

open system.

➢ E.g.- compressor, turbine, nozzle.

➢ We permit the mass to cross the system

boundary in either direction.

➢ Energy in the form of heat or work can

cross the open system boundary.

➢ Most of engineering problems involve

mass flow in and out of a system.

➢ The term control volume is used in place

of open system.

➢ No mass is permitted to cross the system

boundary. (constant mass)

➢ E.g. : Classroom with door & windows closed.

➢ A system in which mass is fixed called a

closed system, or control mass system.

➢ Energy in the form of heat or work can cross

the closed system boundary.

➢ In closed system, boundary does not have to

be fixed.

➢ If energy (heat/work) is not allowed to cross

we have an isolated system.

➢ By definition, universe is isolated system.

Thermodynamics Systems : Closed and Isolated

Q. 14 State zeroth, first and second (Clausius statement and Kelvin-Planck’s statement) law

of thermodynamics.

Zeroth Law of Thermodynamics: If two bodies are in thermal equilibrium with a third body

separately, they are also in thermal equilibrium with each other.

First Law of Thermodynamics: Energy can neither be created nor destroyed but it can only

be converted from one form to another.

Second Law of Thermodynamics:

Kevin-Planck Statement: It is impossible for heat engine operating on a cycle to receive

heat from a single reservoir and produce net work.

Clausius statement: It is impossible to construct a device that operates in a cycle and

produces no effect other than the transfer of heat from a lower-temperature body to a higher-

temperature body.

Q.15 Draw a sketch of heat pump and refrigerator using heat source and heat sink concept.

Prove that: (COP)heat pump = (COP)refrigerator + 1.

Q. 16 Numerical

Q. 17 Differentiate between water tube and fire tube boilers.

Q. 18 Write a note on Hydro-electric power plant.

Q. 19 Differentiate between 4-stroke engine and 2-stroke engine

Q. 20 Differentiate between petrol engine and diesel engine.