Question 1 of 25
Hints left: 3
Q1
What is the primary use of geothermal energy?
Q2
What happens to pressure in a fluid as it flows through a constriction?
Q3
What is the primary function of an air conditioning system?
Q4
What is the primary source of energy for hydroelectric power?
Q5
In a heat pump, which direction does heat flow?
Q6
What is the primary effect of adding salt to ice?
Q7
What is the purpose of using a thermosiphon?
Q8
Which of the following is a characteristic of a heat pump?
Q9
What is the main disadvantage of using fossil fuels for energy?
Q10
Which process occurs when water boils?
Q11
In a steam cycle, what is the primary role of the turbine?
Q12
What is the purpose of a capacitor in a refrigeration system?
Q13
Which of the following materials has the highest thermal conductivity?
Q14
Which process can be used to increase the temperature of a gas?
Q15
What is the effect of temperature on the density of most liquids?
Q16
What is the primary function of a thermostat in HVAC systems?
Q17
Which type of heat transfer is primarily responsible for heating water in a kettle?
Q18
What happens to the efficiency of a heat engine at lower temperatures?
Q19
Which process occurs in the condenser of a refrigeration system?
Q20
What is the effect of increasing altitude on boiling point?
Q21
What happens to the efficiency of an engine as it increases in size?
Q22
Which type of thermal energy storage uses phase change materials?
Q23
Which component of a refrigeration system removes heat from the refrigerant?
Q24
What is the main advantage of using variable-speed drives in motors?
Q25
What happens to a gas's volume when it is cooled at constant pressure?