35 mind-cracking multiple-choice questions related to cost and production theory in economics at the university undergraduate level, along with detailed explanations of the answers
**1.** What cost concept represents the change in total cost resulting from producing one additional unit of output?
a) Average total cost (ATC)
b) Marginal cost (MC)
c) Average variable cost (AVC)
d) Total fixed cost (TFC)
**Answer: b) Marginal cost (MC)**
**Explanation:** Marginal cost (MC) represents the change in total cost when producing one additional unit of output.
**2.** In the short run, what happens to a firm's fixed costs (FC) as production increases?
a) Fixed costs decrease proportionally.
b) Fixed costs remain constant.
c) Fixed costs increase proportionally.
d) Fixed costs become irrelevant.
**Answer: d) Fixed costs become irrelevant.**
**Explanation:** In the short run, fixed costs (FC) remain constant and do not change with changes in production. However, they become irrelevant when making short-run production decisions.
**3.** What is the primary focus of a firm aiming to operate at the minimum efficient scale (MES)?
a) Maximizing short-run profits
b) Achieving economies of scale
c) Minimizing per-unit costs
d) Minimizing average variable costs (AVC)
**Answer: c) Minimizing per-unit costs**
**Explanation:** Operating at the minimum efficient scale (MES) involves minimizing per-unit costs, representing a long-term objective for firms.
**4.** In the long run, what is the significance of a firm operating below the long-run average cost (LRAC) curve?
a) The firm is experiencing economies of scale.
b) The firm is operating at the minimum efficient scale (MES).
c) The firm is minimizing per-unit costs.
d) The firm is not producing at its full capacity.
**Answer: d) The firm is not producing at its full capacity.**
**Explanation:** When a firm operates below the LRAC curve, it is not producing at its full capacity, and it may be experiencing inefficiencies in production.
**5.** What term describes the point at which a firm produces at its lowest per-unit cost in the long run?
a) Economies of scale
b) Minimum efficient scale (MES)
c) Short-run equilibrium
d) Optimal production point
**Answer: b) Minimum efficient scale (MES)**
**Explanation:** Minimum efficient scale (MES) represents the production point at which a firm produces at its lowest per-unit cost in the long run.
**6.** In the long run, what happens to a firm's fixed costs (FC) as it increases its production scale?
a) Fixed costs decrease proportionally.
b) Fixed costs remain constant.
c) Fixed costs increase proportionally.
d) Fixed costs become irrelevant.
**Answer: b) Fixed costs remain constant.**
**Explanation:** In the long run, fixed costs (FC) remain constant because they do not change with changes in production levels.
**7.** What condition must be met for a firm to operate at its profit-maximizing level of production when price (P) exceeds average total cost (ATC) in the short run?
a) The firm maximizes short-run profits.
b) The firm continues production in the short run.
c) The firm shuts down in the short run.
d) The firm maximizes long-run profits.
**Answer: a) The firm maximizes short-run profits.**
**Explanation:** If price (P) is above average total cost (ATC) in the short run, the firm maximizes short-run profits by producing the quantity where MC equals MR.
**8.** What term describes a situation where a firm experiences increasing per-unit costs as production increases?
a) Diseconomies of scale
b) Economies of scale
c) Constant returns to scale
d) Short-run cost minimization
**Answer: a) Diseconomies of scale**
**Explanation:** Diseconomies of scale occur when a firm experiences increasing per-unit costs as production expands, often due to coordination challenges and inefficiencies.
**9.** In a perfectly competitive market, what is the relationship between price (P) and average total cost (ATC) when the firm is earning a normal profit in the long run?
a) P > ATC
b) P < ATC
c) P = ATC
d) P is irrelevant to ATC.
**Answer: c) P = ATC**
**Explanation:** In the long run, in a perfectly competitive market, the firm earns zero economic profit, so price (P) equals average total cost (ATC).
**10.** What is the primary focus of a firm aiming to operate at the minimum efficient scale (MES)?
a) Maximizing short-run profits
b) Achieving economies of scale
c) Minimizing per-unit costs
d) Minimizing average variable costs (AVC)
**Answer: c) Minimizing per-unit costs**
**Explanation:** Operating at the minimum efficient scale (MES) involves minimizing per-unit costs, representing a long-term objective for firms.
**11.** In a perfectly competitive market, what happens when a firm's price (P) exceeds its average variable cost (AVC) but is less than its average total cost (ATC) in the short run?
a) The firm maximizes short-run profits.
b) The firm continues production in the short run.
c) The firm shuts down in the short run.
d) The firm exits the market in the long run.
**Answer: b) The firm continues production in the short run.**
**Explanation:** If price (P) exceeds average variable cost (AVC) but is less than average total cost (ATC) in the short run, the firm continues production in the short run to cover variable costs.
**12.** What term describes the point at which a firm produces at its lowest per-unit cost in the long run?
a) Economies of scale
b) Minimum efficient scale (MES)
c) Short-run equilibrium
d) Optimal production point
**Answer: b) Minimum efficient scale (MES)**
**Explanation:** Minimum efficient scale (MES) represents the production point at which a firm produces at its lowest per-unit cost in the long run.
**13.** In the long run, what happens to a firm's fixed costs (FC) as it increases its production scale?
a) Fixed costs decrease proportionally.
b) Fixed costs remain constant.
c) Fixed costs increase proportionally.
d) Fixed costs become irrelevant.
**Answer: b) Fixed costs remain constant.**
**Explanation:** In the long run, fixed costs (FC) remain constant because they do not change with changes in production levels.
**14.** What is the primary focus of a firm aiming to operate at the minimum efficient scale (MES)?
a) Maximizing short-run profits
b) Achieving economies of scale
c) Min
imizing per-unit costs
d) Minimizing average variable costs (AVC)
**Answer: c) Minimizing per-unit costs**
**Explanation:** Operating at the minimum efficient scale (MES) involves minimizing per-unit costs, representing a long-term objective for firms.
**15.** In a perfectly competitive market, what is the relationship between marginal cost (MC) and price (P) at the profit-maximizing level of production?
a) MC < P
b) MC > P
c) MC = P
d) MC is irrelevant in perfectly competitive markets.
**Answer: c) MC = P**
**Explanation:** In a perfectly competitive market, firms maximize profit by producing where marginal cost (MC) equals price (P).
**16.** Which factor is essential for achieving economies of scale in production?
a) A large and diverse product line
b) High levels of product differentiation
c) Efficient resource utilization and cost minimization
d) High market share
**Answer: c) Efficient resource utilization and cost minimization**
**Explanation:** Achieving economies of scale in production relies on efficient resource utilization and cost minimization to reduce per-unit costs as production increases.
**17.** In a perfectly competitive market, what happens when a firm's price (P) is above its average total cost (ATC) in the short run?
a) The firm maximizes short-run profits.
b) The firm continues production in the short run.
c) The firm shuts down in the short run.
d) The firm maximizes long-run profits.
**Answer: a) The firm maximizes short-run profits.**
**Explanation:** If price (P) is above average total cost (ATC) in the short run, the firm maximizes short-run profits by producing the quantity where MC equals MR.
**18.** What term describes a situation where a firm experiences increasing per-unit costs as production increases?
a) Diseconomies of scale
b) Economies of scale
c) Constant returns to scale
d) Short-run cost minimization
**Answer: a) Diseconomies of scale**
**Explanation:** Diseconomies of scale occur when a firm experiences increasing per-unit costs as production expands, often due to coordination challenges and inefficiencies.
**19.** In a perfectly competitive market, what is the relationship between price (P) and average total cost (ATC) when the firm is earning a normal profit in the long run?
a) P > ATC
b) P < ATC
c) P = ATC
d) P is irrelevant to ATC.
**Answer: c) P = ATC**
**Explanation:** In the long run, in a perfectly competitive market, the firm earns zero economic profit, so price (P) equals average total cost (ATC).
**20.** What is the primary focus of a firm aiming to operate at the minimum efficient scale (MES)?
a) Maximizing short-run profits
b) Achieving economies of scale
c) Minimizing per-unit costs
d) Minimizing average variable costs (AVC)
**Answer: c) Minimizing per-unit costs**
**Explanation:** Operating at the minimum efficient scale (MES) involves minimizing per-unit costs, representing a long-term objective for firms.
**21.** In a perfectly competitive market, what happens when a firm's price (P) exceeds its average variable cost (AVC) but is less than its average total cost (ATC) in the short run?
a) The firm maximizes short-run profits.
b) The firm continues production in the short run.
c) The firm shuts down in the short run.
d) The firm exits the market in the long run.
**Answer: b) The firm continues production in the short run.**
**Explanation:** If price (P) exceeds average variable cost (AVC) but is less than average total cost (ATC) in the short run, the firm continues production in the short run to cover variable costs.
**22.** What term describes the point at which a firm produces at its lowest per-unit cost in the long run?
a) Economies of scale
b) Minimum efficient scale (MES)
c) Short-run equilibrium
d) Optimal production point
**Answer: b) Minimum efficient scale (MES)**
**Explanation:** Minimum efficient scale (MES) represents the production point at which a firm produces at its lowest per-unit cost in the long run.
**23.** In the long run, what happens to a firm's fixed costs (FC) as it increases its production scale?
a) Fixed costs decrease proportionally.
b) Fixed costs remain constant.
c) Fixed costs increase proportionally.
d) Fixed costs become irrelevant.
**Answer: b) Fixed costs remain constant.**
**Explanation:** In the long run, fixed costs (FC) remain constant because they do not change with changes in production levels.
**24.** What is the primary focus of a firm aiming to operate at the minimum efficient scale (MES)?
a) Maximizing short-run profits
b) Achieving economies of scale
c) Minimizing per-unit costs
d) Minimizing average variable costs (AVC)
**Answer: c) Minimizing per-unit costs**
**Explanation:** Operating at the minimum efficient scale (MES) involves minimizing per-unit costs, representing a long-term objective for firms.
**25.** In a perfectly competitive market, what is the relationship between marginal cost (MC) and price (P) at the profit-maximizing level of production?
a) MC < P
b) MC > P
c) MC = P
d) MC is irrelevant in perfectly competitive markets.
**Answer: c) MC = P**
**Explanation:** In a perfectly competitive market, firms maximize profit by producing where marginal cost (MC) equals price (P).
These questions and explanations provide a comprehensive understanding of cost and production theory in economics at the university undergraduate level, challenging students to think critically about the concepts and their practical applications.
