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Questions and Answers
What material is used to cast the cylinder block and upper half of the crank case?
Which component serves as a cooling and ventilation system for engine lubricating oil?
What type of work is converted from heat energy in a heat engine?
Which type of engine is a steam engine categorized under?
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Which device is an example of a power absorbing heat engine?
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What are the types of reciprocating steam engines?
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What is the second step in the Carnot cycle?
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What cycle do thermal power plants operate on?
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What is the maximum efficiency of a combined cycle gas turbine (steam cooled)?
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What is the torque available at the contact between road and driving wheel called?
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Study Notes
Optimum Firing Order of Engine
- Engine vibration, engine cooling, and development of backpressure are considered while deciding the optimum firing order of an engine.
- Engine configuration is not considered while deciding the optimum firing order of an engine.
Dwell Meter
- The Dwell meter is used to set the contact breaker gap.
Vacuum Advance Mechanism
- The vacuum advance mechanism shifts the ignition point under part-load operation.
Electric Field
- The conventional direction of electric field is from positive to negative.
- Electric field originates at a positive charge.
- Electric field terminates at a negative charge.
- Electric field lines never intersect.
- A field that spreads outwards in all directions is radial.
Capacitor
- The insulant between the two plates of a capacitor is called dielectric.
- The time constant of a capacitor depends on the charging and discharging rate.
- The initial current while charging a capacitor is high.
Lead-Acid Battery
- PbSO4 gets deposited on the plates of a discharged lead-acid battery.
- The number of positive plates in a battery cell is one less than the negative plates.
- A maintenance-free battery has a lead-calcium plate grid.
Alkaline Battery
- The specific gravity of electrolyte remains the same in an alkaline battery.
Speed Measurement
- Magnetic pickup is the best method to measure the speed.
Ignition System
- The function of the ignition system is to initiate the flame propagation process.
- The total enthalpy required to cause the flame to be self-sustaining and promote ignition is given by the product of the surface area of the spherical flame and the enthalpy per unit area.
- An ignition process obeys the law of conservation of energy.
- Air is a poor conductor of electricity, and an air gap in an electric circuit acts as a high resistance.
Engine Components
- Cylinder liners are cast by semi-steel material.
- The oil sump serves as a cooling and ventilation of engine lubricating oil.
- A heat engine converts heat energy from fuel combustion or any other source into mechanical work.
- A steam engine comes under the category of external combustion engines.
- An air compressor is a power-absorbing heat engine.
Reciprocating Steam Engine
- All of the following are types of reciprocating steam engines: simple, compound, and uniflow.
Carnot Cycle
- The 2nd step of the Carnot cycle is isentropic compression.
Thermal Power Plants
- Thermal power plants operate on the Rankine cycle.
- The efficiency of a combined cycle gas turbine (steam cooled) can range as high as 60%.
Automobile Systems
- The engine produces mechanical power that is transmitted to the automobile's wheels through a drivetrain, which includes transmission & driveshaft(s), and differential & axles.
- The torque available at the contact between the road and driving wheel is called tractive effort.
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Description
This quiz covers various aspects of internal combustion engines, including firing order, dwell meter, vacuum advance mechanism, and electric fields.
