AP Microeconomics Practice Quiz: Market Equilibrium and Consumer and Producer Surplus
Written by AP Content Team, Verified for 2026 AP Exams, Last updated: May 2026
Test your understanding with short quizzes. This quiz has 12 questions to check your progress.
Question 1 of 12
All Questions (12)
A) The quantity supplied is greater than the quantity demanded, creating a surplus.
B) The price of a good brings the quantity supplied and quantity demanded into balance.
C) The quantity demanded is greater than the quantity supplied, creating a shortage.
D) Producers maximize their surplus, while consumer surplus is zero.
Correct Answer: B
According to the provided content, 'equilibrium is achieved (and markets clear with no shortages or surpluses) when the price of a good or service brings the quantity supplied and quantity demanded into balance.'
A) To calculate the total cost of production for a firm.
B) To determine the level of government intervention needed in a market.
C) To measure the benefits that markets create for buyers and sellers and understand market efficiency.
D) To predict the future price and quantity of a good or service.
Correct Answer: C
The provided text states, 'Economists use consumer surplus and producer surplus to measure the benefits markets create to buyers and sellers and understand market efficiency.'
A) guarantees that all producers will earn a profit.
B) ensures the price is as low as possible for all consumers.
C) eliminates all shortages and surpluses permanently.
D) maximizes the total economic surplus in the absence of market failures.
Correct Answer: D
The content explicitly states that 'Market equilibrium maximizes total economic surplus in the absence of market failures, meaning that perfectly competitive markets are efficient.'
A) below the equilibrium price and above the supply curve.
B) to the right of the equilibrium quantity.
C) below the demand curve and above the equilibrium price.
D) that encompasses the entire area below the demand curve.
Correct Answer: C
Based on the definition of consumer surplus as the benefit to buyers, it is graphically represented as the area between the price consumers are willing to pay (the demand curve) and the price they actually pay (the equilibrium price), up to the equilibrium quantity.
A) It provides information to guide resource allocation.
B) It is set by the government to ensure fairness.
C) It creates a permanent surplus to benefit consumers.
D) It equals the total production cost for all firms.
Correct Answer: A
The provided content states that 'Equilibrium price provides information to economic decision-makers to guide resource allocation.'
A) $1,500
B) $1,000
C) $750
D) $500
Correct Answer: D
Producer surplus is calculated as the area of the triangle above the supply curve and below the equilibrium price. The formula is 0.5 * base * height. The base is the equilibrium quantity (100). The height is the difference between the equilibrium price ($15) and the minimum supply price ($5), which is $10. Calculation: 0.5 * 100 * ($15 - $5) = 0.5 * 100 * 10 = $500.
A) how to eliminate all market failures.
B) the factors that influence prices and quantities.
C) the specific production methods of individual firms.
D) how to set legally mandated price ceilings and floors.
Correct Answer: B
The text states, 'The supply-demand model is a tool for understanding what factors influence prices and quantities and why prices and quantities might differ across markets or change over time.'
A) all potential buyers and sellers have left the market.
B) the government has purchased all excess goods.
C) the price has brought quantity supplied and demanded into balance, leaving no surplus or shortage.
D) producer surplus is exactly equal to consumer surplus.
Correct Answer: C
The content specifies that in a perfectly competitive market, 'equilibrium is achieved (and markets clear with no shortages or surpluses) when the price of a good or service brings the quantity supplied and quantity demanded into balance.'
A) $2,000
B) $1,000
C) $500
D) $250
Correct Answer: C
Consumer surplus is the area of the triangle below the demand curve and above the equilibrium price. The formula is 0.5 * base * height. The base is the equilibrium quantity (500). The height is the difference between the maximum price consumers are willing to pay ($4) and the equilibrium price ($2), which is $2. Calculation: 0.5 * 500 * ($4 - $2) = 0.5 * 500 * 2 = $500.
A) total revenue for producers.
B) total expenditure by consumers.
C) total economic surplus, which is maximized.
D) net loss to society from market activity.
Correct Answer: C
The content indicates that 'Market equilibrium maximizes total economic surplus in the absence of market failures.' Total economic surplus is the sum of consumer and producer surplus.
A) below the demand curve and above the supply curve.
B) above the supply curve and below the equilibrium price.
C) below the equilibrium price and to the left of the supply curve.
D) above the demand curve and above the equilibrium price.
Correct Answer: B
Based on the definition of producer surplus as the benefit to sellers, it is graphically represented as the area between the price sellers receive (the equilibrium price) and the minimum price they are willing to accept (the supply curve), up to the equilibrium quantity.
A) The market is experiencing a significant failure.
B) The market is operating efficiently.
C) The government has imposed a binding price control.
D) Producer surplus is zero.
Correct Answer: B
The provided content directly links the maximization of total economic surplus at equilibrium with market efficiency, stating, 'Market equilibrium maximizes total economic surplus in the absence of market failures, meaning that perfectly competitive markets are efficient.'