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ВходЗачетный тест для гр.Теплотехники. 3 курс, 6 сем
Список вопросов теста
Вопрос 1
Which type of engine converts chemical energy into mechanical energy through combustion?
Варианты ответов
- Electric motor
- Steam engine
- Internal combustion engine
- Hydraulic engine
Вопрос 2
The primary function of the carburetor in a gasoline engine is to:
Варианты ответов
- Ignite the fuel
- Cool the engine
- Mix air and fuel
- Lubricate moving parts
Вопрос 3
What is the purpose of the exhaust system in an engine?
Варианты ответов
- To introduce fresh air
- To remove combustion byproducts
- To control engine temperature
- To increase engine power
Вопрос 4
A diesel engine differs from a gasoline engine primarily in its:
Варианты ответов
- Ignition method
- Fuel type
- Number of cylinders
- Cooling system
Вопрос 5
Which component of an engine is responsible for converting the linear motion of the piston into rotational motion?
Варианты ответов
- Spark plug
- Crankshaft
- Valve
- Camshaft
Вопрос 6
What is the main advantage of a turbocharger?
Варианты ответов
- Reduces fuel consumption
- Increases engine power output
- Lowers engine operating temperature
- Simplifies engine design
Вопрос 7
The process of bringing air and fuel into the cylinder is called:
Варианты ответов
- Combustion
- Exhaust
- Intake
- Compression
Вопрос 8
What phenomenon can occur in an internal combustion engine if the air-fuel mixture ignites prematurely?
Варианты ответов
- Knocking (detonation)
- Overheating
- Stalling
- Backfiring
Вопрос 9
A heat exchanger is a device designed to
Варианты ответов
- Generate heat
- Transfer heat between two or more fluids
- Store heat
- Convert heat into electricity
Вопрос 10
In a shell-and-tube heat exchanger, which part contains the tubes?
Варианты ответов
- The shell
- The headers
- The baffles
- The tube bundle
Вопрос 11
What is the main advantage of a counter-flow heat exchanger compared to a parallel-flow heat exchanger?
Варианты ответов
- Simpler design
- Higher overall heat transfer rate
- Lower cost of manufacturing
- Easier maintenance
Вопрос 12
Which type of heat exchanger is commonly used in air conditioning systems and car radiators?
Варианты ответов
- Plate heat exchanger
- Shell-and-tube heat exchanger
- Finned-tube heat exchanger
- Spiral heat exchanger
Вопрос 13
The efficiency of a heat exchanger can be affected by:
Варианты ответов
- The viscosity of the fluids
- The presence of fouling
- The flow rates of the fluids
- All of the above
Вопрос 14
In a heat exchanger, what does the term “logarithmic mean temperature difference” (LMTD) represent?
Варианты ответов
- The average temperature of the hot fluid
- The average temperature of the cold fluid
- The effective temperature difference driving heat transfer
- The final temperature of the hot fluid
Вопрос 15
A local heating system typically serves:
Варианты ответов
- An entire city
- A single building or a small group of buildings
- A large industrial complex
- A residential district
Вопрос 16
What is the primary role of a boiler in a local heating system?
Варианты ответов
- To distribute hot water or steam
- To heat the water or produce steam
- To regulate room temperature
- To control air flow
Вопрос 17
Radiators and convectors are examples of:
Варианты ответов
- Heat sources
- Heat distribution networks
- Heat emitters
- Control devices
Вопрос 18
Which component is responsible for circulating the heated fluid (water or steam) through the pipes of a local heating system?
Варианты ответов
- Boiler
- Expansion tank
- Pump
- Thermostat
Вопрос 19
What is the purpose of an expansion tank in a hydronic heating system?
Варианты ответов
- To add water to the system
- To store excess heat
- To accommodate the expansion and contraction of water due to temperature changes
- To filter the water
Вопрос 20
A thermostat is used to:
Варианты ответов
- Generate heat
- Measure the temperature of the incoming air
- Control the operation of the heating system to maintain a desired temperature
- Distribute heated air
Вопрос 21
Which of the following are key components of an internal combustion engine? (Выберите все подходящие варианты)
Варианты ответов
- Generator
- Piston
- Spark plug (for gasoline engines)
- Turbine
- Crankshaft
Вопрос 22
What are the primary factors that influence the efficiency of a heat exchanger? (Выберите все подходящие варианты)
Варианты ответов
- The surface area for heat transfer.
- The materials used in construction.
- The flow rates of the fluids
- The operating temperature of the ambient environment.
- The temperature difference between the fluids.
Вопрос 23
Соотнеси слова с их определением
1.
Boiler
2.
Radiator
3.
Pump
4.
Thermostat
5.
Expansion Tank
6.
Hydronic Heating System
7.
Convector
8.
Zoning
Варианты ответов
- A device that produces hot water or steam, typically by burning fuel.
- A heating device that transfers heat from hot water or steam to the surrounding air, primarily through convection and radiation.
- A device used to circulate the heating fluid (water or steam) through the system.
- A control device that senses the room temperature and regulates the heating system to maintain a desired setpoint.
- A component that accommodates the increase in water volume as it heats up, preventing excessive pressure build-up.
- A heating system that uses water as the heat transfer medium.
- A heating device that primarily transfers heat through the natural circulation of air over a heated surface.
- The division of a building into separate areas, each with its own temperature control, allowing for customized heating.
Вопрос 24
Расположите предложения в логическом порядке, чтобы сформировать связный абзац. Затем запишите порядок предложений (например, 1, 2, 3, 4).
Варианты ответов
- First, a mixture of fuel and air is drawn into the cylinder as the piston moves down.
- The piston moves up, compressing the air-fuel mixture inside the cylinder.
- The fuel-air mixture is ignited by a spark plug, causing a small explosion.
- This rapid expansion of gases forces the piston downwards.
- As the piston moves down, it turns the crankshaft, generating rotational power.
- Then, the exhaust gases are pushed out of the cylinder as the piston moves up again.
Вопрос 25
Прочитайте каждое утверждение. Если утверждение истинно, напишите “True”. Если утверждение ложно, напишите “False”.
Варианты ответов
- A diesel engine uses a spark plug to ignite the fuel-air mixture.
- The primary role of the cooling system is to increase engine temperature for better performance.
- In a four-stroke engine, there is one power stroke for every four strokes of the piston.
- Shell-and-tube heat exchangers are characterized by fluid flow within tubes enclosed in a shell.
- Plate heat exchangers are known for their compact design.
- A boiler’s main function is to distribute heated water throughout a building.
- An expansion tank is used to prevent the water in a hydronic system from freezing.
- Zoning in a heating system allows for different temperature settings in various areas of a building.
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