---
title: "AP Microeconomics Unit 3 Practice Test"
description: "A timed AP Microeconomics Unit 3 (Production, Cost, and the Perfect Competition Model) practice test in the AP format, drawn from 1,562 multiple-choice questions and 47 FRQs written for the unit. The standard version takes about 63 minutes."
canonical: "https://fiveable.me/ap-micro/unit-test/3"
type: "unit-test"
subject: "AP Microeconomics"
unit: "Unit 3"
---

# AP Microeconomics Unit 3 Practice Test

## Overview

A timed AP Microeconomics Unit 3 (Production, Cost, and the Perfect Competition Model) practice test in the AP format, drawn from 1,562 multiple-choice questions and 47 FRQs written for the unit. The standard version takes about 63 minutes.

## Test Format

- 20 Multiple Choice Questions (23 minutes)
- 1 FRQ – FRQ 1 – Long (20 minutes)
- 1 FRQ – FRQ 2 – Short (20 minutes)

## Unit FRQs by Type

- [FRQ 1 – Long](/ap-micro/frqs/long-frq?unit=3): 16 questions
- [FRQ 2 – Short](/ap-micro/frqs/short-frq-2?unit=3): 13 questions
- [FRQ 3 – Short](/ap-micro/frqs/short-frq-3?unit=3): 18 questions

## Practice Questions

### Question 1

In a competitive market economy, a firm discovers a new technology that reduces the labor required to manufacture textiles. Which of the following explains the firm's primary motivation for adopting this technology?

- (A) To maximize profit by reducing average total costs below the market price
- (B) To maximize revenue by raising the market price above average total costs
- (C) To maximize employment by raising labor usage above current market levels
- (D) To maximize welfare by reducing social costs below current market levels
- (E) To maximize market share by undercutting competitors' prices

**Answer: (A)** Connecting the profit maximization motive to production decisions explains why firms adopt cost-saving technology. In a market system, reducing costs increases the margin between price and cost, thereby increasing profit.

### Question 2

Which statement correctly describes the difference between the Law of Increasing Opportunity Cost and the Law of Diminishing Marginal Returns?

- (A) Increasing opportunity cost applies to economy-wide trade-offs; diminishing returns to firm output.
- (B) Increasing opportunity cost applies to firm output; diminishing returns to economy-wide trade-offs.
- (C) Increasing opportunity cost assumes fixed inputs; diminishing returns assumes variable technology.
- (D) Increasing opportunity cost assumes variable technology; diminishing returns assumes fixed inputs.
- (E) Both apply to firm-level decisions but differ in time horizons.

**Answer: (A)** Distinguishing the scope clarifies that opportunity cost describes macro-level resource allocation (PPC), while diminishing returns describes micro-level production with fixed inputs.

### Question 3

A store owner owns the building where the shop is located. Similar buildings in the area rent for $3,000 per month. How does this potential rent affect the shop's economic profit?

- (A) It is an implicit cost that decreases economic profit by $3,000
- (B) It is an explicit cost that decreases accounting profit by $3,000
- (C) It is an implicit revenue that increases economic profit by $3,000
- (D) It is an explicit revenue that increases accounting profit by $3,000
- (E) It is an explicit cost that decreases economic profit by $3,000

**Answer: (A)** Explaining economic profit requires including implicit costs; the forgone rent is an opportunity cost that reduces economic profit, even though no check is written.

### Question 4

A consultant leaves a corporate job paying $80,000 per year to start a new firm. In the first year, the firm generates $150,000 in revenue with explicit operating expenses of $60,000. Based on these figures, which economic concept correctly describes the firm's outcome?

- (A) Economic profit of $10,000
- (B) Economic profit of $90,000
- (C) Accounting profit of $10,000
- (D) Accounting loss of $80,000

**Answer: (A)** Economic profit subtracts both explicit costs ($60,000) and implicit costs ($80,000 foregone salary) from revenue ($150,000). $150,000 - $60,000 - $80,000 = $10,000.

### Question 5

An entrepreneur leaves a job paying $60,000 per year to start a consulting firm. In the first year, the firm earns $100,000 in revenue and incurs $30,000 in explicit expenses. Which of the following correctly explains the economic outcome?

- (A) Economic profit is $10,000, accounting for explicit expenses and forgone salary
- (B) Economic profit is $70,000, accounting only for explicit expenses and revenue
- (C) Accounting profit is $40,000, accounting for revenue minus forgone salary only
- (D) Accounting profit is $30,000, accounting for explicit expenses minus forgone salary

**Answer: (A)** Economic profit subtracts both explicit costs ($30,000) and implicit costs (the $60,000 forgone salary) from total revenue ($100,000). The calculation is $100,000 - $30,000 - $60,000 = $10,000.

### Question 6

An entrepreneur leaves a job paying $50,000 per year to start a business. In the first year, the business generates $100,000 in revenue and incurs $60,000 in explicit costs. Based on this data, which statement accurately describes the entrepreneur's economic profit or loss?

- (A) Economic loss of $10,000, indicating the business should close
- (B) Accounting profit of $40,000, indicating the business should remain open
- (C) Economic profit of $30,000, indicating the business is viable and should expand
- (D) Economic loss of $10,000, but the business should remain open because accounting profit is positive

**Answer: (A)** Calculating economic profit requires subtracting both explicit costs ($60,000) and implicit costs ($50,000 foregone salary) from revenue ($100,000). The result is -$10,000, signaling resources could be better used elsewhere.

### Question 7

A store owner owns their building mortgage-free. They could rent the building to another tenant for $30,000 per year. The store generates an accounting profit of $50,000 per year. What is the store owner's economic profit?

- (A) $20,000, accounting for the forgone rental income
- (B) $50,000, ignoring the implicit cost of the building
- (C) $80,000, adding the rental potential to the profit
- (D) $30,000, representing only the implicit rental cost

**Answer: (A)** Calculating economic profit requires subtracting the implicit cost (opportunity cost) of the building from the accounting profit. $50,000 - $30,000 = $20,000.

### Question 8

Both accounting profit and economic profit deduct explicit costs from total revenue, but they differ in their treatment of implicit costs. Which statement correctly identifies this difference and a limitation of using accounting profit for decision-making?

- (A) Accounting profit ignores implicit costs; this overstates the profitability of a venture.
- (B) Economic profit deducts implicit costs; this understates the profitability of a venture.
- (C) Accounting profit ignores implicit costs; this understates the true opportunity cost of resources used.
- (D) Accounting profit ignores implicit costs; this makes it useful for comparing ventures with different resource ownership structures.
- (E) Economic profit deducts implicit costs; this makes it more useful for comparing ventures with different resource ownership structures.

**Answer: (A)** Accounting profit only subtracts explicit costs, so it fails to account for the implicit costs of resources the owner already possesses (like forgone wages or foregone returns on invested capital). Because these opportunity costs are left out, accounting profit makes a venture look more profitable than it actually is once all costs are considered.

### Question 9

An entrepreneur starts a business with $100,000 in revenue. Explicit costs for supplies and labor are $60,000. The entrepreneur gave up a salary of $30,000 and uses a personal building that could be rented out for $15,000. What is the business's economic profit?

- (A) A profit of $40,000, derived from revenue minus explicit costs only
- (B) A loss of $5,000, derived from revenue minus explicit costs and foregone salary only
- (C) A loss of $5,000, derived from revenue minus all economic costs
- (D) A profit of $25,000, derived from revenue minus explicit costs and building opportunity cost only

**Answer: (C)** Economic profit subtracts both explicit costs ($60,000) and implicit costs ($30,000 salary + $15,000 rent) from revenue ($100,000). $100,000 - $105,000 = -$5,000.

### Question 10

An entrepreneur leaves a job earning $$80,000$$ per year to start a new business. They withdraw $$100,000$$ from savings that earned $$5\%$$ interest annually to cover startup costs. In the first year, the business generates $$200,000$$ in revenue and incurs $$100,000$$ in explicit expenses. What is the economic profit for the first year?

- (A) $$15,000$$
- (B) $$20,000$$
- (C) $$95,000$$
- (D) $$100,000$$
- (E) $$5,000$$

**Answer: (A)** Economic profit subtracts both explicit expenses ($$100,000$$) and implicit costs ($$80,000$$ salary + $$5,000$$ forgone interest) from total revenue ($$200,000$$).

## Review the Unit

- [3.1 The Production Function](/ap-micro/unit-3/production-function/study-guide/euPM8nkZyHZuiKhQJFye)
- [3.2 Short-Run Production Costs](/ap-micro/unit-3/short-run-production-costs/study-guide/S1lEI7gKXeKkFx2YZO5s)
- [3.3 Long-Run Production Costs](/ap-micro/unit-3/long-run-production-costs/study-guide/N7KjG5o9iL7qtDdhw1KW)
- [3.4 Types of Profit](/ap-micro/unit-3/types-profit/study-guide/vxIdLwjPGUkDbcjELR2d)
- [3.5 Profit Maximization](/ap-micro/unit-3/profit-maximization/study-guide/5QqNeOqi4svVRIdH6O1L)
- [3.6 Firms' Short-Run Decisions to Produce and Long-Run Decisions to Enter or Exit a Market](/ap-micro/unit-3/firms-short-run-long-run-decisions/study-guide/JGfrWQLNXKtC7OWmxCvF)
- [3.7 Perfect Competition](/ap-micro/unit-3/perfect-competition/study-guide/T08vY2meNhtpbLCT83uH)

## Other Unit Tests

- [Unit 1: Basic Economic Concepts](/ap-micro/unit-test/1)
- [Unit 2: Supply and Demand](/ap-micro/unit-test/2)
- [Unit 4: Imperfect Competition](/ap-micro/unit-test/4)
- [Unit 5: Factor Markets](/ap-micro/unit-test/5)
- [Unit 6: Market Failure and the Role of Government](/ap-micro/unit-test/6)

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