ISAT Quantitative Reasoning with Units 5 — Questions and Answers
Question 1: A car engine produces 150 kilowatts of power. How many horsepower is this? (1 hp ≈ 0.746 kW)
- approximately 201 hp (Correct answer)
- approximately 112 hp
- approximately 150 hp
- approximately 300 hp
Correct answer: approximately 201 hp
150 ÷ 0.746 ≈ 201 hp.
Question 2: A storage tank is cylindrical with a radius of 3 m and a height of 5 m. If 1 m³ = 1,000 liters, approximately how many liters can it hold? (π ≈ 3.14)
- 141,300 L (Correct answer)
- 47,100 L
- 14,130 L
- 282,600 L
Correct answer: 141,300 L
V = 3.14 × 3² × 5 = 141.3 m³ × 1,000 = 141,300 L.
Question 3: A worker earns $18.50 per hour and works 37.5 hours per week. What is the annual salary assuming 52 working weeks?
- $36,075 (Correct answer)
- $3,607.50
- $703.13
- $72,150
Correct answer: $36,075
$18.50 × 37.5 × 52 = $36,075.
Question 4: A weather station records a temperature drop of 18°F overnight. What is this change in degrees Celsius? (ΔC = ΔF × 5/9)
- 10°C (Correct answer)
- 18°C
- –10°C
- 32.4°C
Correct answer: 10°C
18 × 5/9 = 10°C change.
Question 5: An object accelerates uniformly from 0 to 90 km/h in 10 seconds. What is its acceleration in m/s²?
- 2.5 m/s² (Correct answer)
- 9 m/s²
- 25 m/s²
- 0.25 m/s²
Correct answer: 2.5 m/s²
90 km/h = 25 m/s; 25 m/s ÷ 10 s = 2.5 m/s².
Question 6: A solar panel generates 350 watts of power. How many kilowatt-hours of energy does it produce in 30 days if it operates 6 hours per day?
- 63 kWh (Correct answer)
- 6.3 kWh
- 630 kWh
- 2,100 kWh
Correct answer: 63 kWh
0.35 kW × 6 h/day × 30 days = 63 kWh.
Question 7: A solution contains 250 mg of salt dissolved in 500 mL of water. What is the concentration in grams per liter?
- 0.5 g/L (Correct answer)
- 5 g/L
- 0.05 g/L
- 50 g/L
Correct answer: 0.5 g/L
250 mg = 0.25 g; 500 mL = 0.5 L; 0.25 ÷ 0.5 = 0.5 g/L.
ISAT Quantitative Reasoning with Units 5
A car engine produces 150 kilowatts of power.
How many horsepower is this? (1 hp ≈ 0.746 kW)