What did Otis do in 1854 to prove his brake worked?

Had the rope cut while he stood on the platform

Why does a counterweight save energy?

The motor lifts only the difference in weight

What drives a traction elevator?

Cables over a motor-driven wheel

What does the speed governor do?

Triggers brakes if the car goes too fast

Elevator Counterweight Quiz: Otis, Pulleys and Safety

This elevator counterweight quiz rides up the shaft to see how lifts move people safely. Play an interactive set of 10 questions on Elisha Otis and his 1854 safety demonstration, the safety brake, counterweights, steel cables and sheaves, traction elevators, hydraulic lifts, why counterweights save energy, governors and how elevators made skyscrapers possible.

Start Elevator Counterweight Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Inventor
Who invented the elevator safety brake?
Demo
What did Otis do in 1854 to prove his brake worked?
Weight
What does the counterweight balance?
Direction
When the car goes up, the counterweight goes...
Energy
Why does a counterweight save energy?
Sheave
What is the grooved wheel cables run over called?
Traction
What drives a traction elevator?
Hydraulic
What pushes a hydraulic elevator up?
Governor
What does the speed governor do?
Towers
Which buildings did safe elevators make possible?

Explanations: answer key for all 10 questions

Q1: Who invented the elevator safety brake?
Answer: Elisha Otis
He founded a famous company.
Q2: What did Otis do in 1854 to prove his brake worked?
Answer: Had the rope cut while he stood on the platform
It was at a New York fair.
Q3: What does the counterweight balance?
Answer: The car's weight
It moves the opposite way.
Q4: When the car goes up, the counterweight goes...
Answer: Down
They are linked by cables.
Q5: Why does a counterweight save energy?
Answer: The motor lifts only the difference in weight
Balance reduces the work.
Q6: What is the grooved wheel cables run over called?
Answer: A sheave
Friction grips the cables.
Q7: What drives a traction elevator?
Answer: Cables over a motor-driven wheel
Most tall buildings use them.
Q8: What pushes a hydraulic elevator up?
Answer: A fluid-driven piston
They suit low buildings.
Q9: What does the speed governor do?
Answer: Triggers brakes if the car goes too fast
It watches speed constantly.
Q10: Which buildings did safe elevators make possible?
Answer: Skyscrapers
People could ride to high floors.

Elevator Counterweight Quiz – Otis, Pulleys and Safety

Elevators move people safely thanks to clever balance and brakes. In 1854 Elisha Otis stood on a raised platform at a New York fair and had the rope cut, and his safety brake caught it. Safe elevators later made tall skyscrapers practical.

Most tall buildings use traction elevators, where steel cables run over a grooved wheel called a sheave turned by a motor. A counterweight on the other end moves down as the car goes up, so the motor only has to lift the difference in weight, which saves energy.

Hydraulic elevators use a fluid-driven piston and suit low buildings. A speed governor watches the car and triggers safety brakes if it goes too fast, and several cables each strong enough to hold the car add extra safety. Modern systems also group calls to cut waiting times.

What This Quiz Teaches

Science fans will enjoy these questions.

Who made elevators safe
How counterweights work
Which elevator types exist
What safety systems do
Why elevators changed cities

Did You Know?

Counterweights often weigh the car plus about 40 to 50 percent of its load.
The tallest buildings use sky lobbies to switch elevators.
Some elevators travel faster than 70 km per hour.
Space elevators remain an idea for the future.
Escalators were developed later for shorter climbs.