Grade 9 Technology Quiz

What is the term used for a system where two syringes are connected with a tube and filled with compressed air?

• Hydraulic System

• Pulley System

• Gear System

• Pneumatic System

According to Pascal's Principle, when work is transferred from a wider cylinder to a narrow cylinder, what happens to the force exerted by the narrow cylinder compared to the wider cylinder?

• It is smaller

• It is equal

• It is greater

• It is opposite

What is the function of an idler gear in a gear system?

• To rotate in the opposite direction

• To decrease the speed of rotation

• To increase the speed of rotation

• To synchronize the rotation of driver and driven gears

In a pulley block system where the load is divided by two ropes, how does the effort needed to lift the load compare to the weight of the load?

• Effort is one-third the weight of the load

• Effort is double the weight of the load

• Effort is half the weight of the load

• Effort is equal to the weight of the load

What is the purpose of a ball valve in a hydraulic system?

• To decrease pressure

• To control the flow of liquid in one direction

• To control the flow of liquid in both directions

• To increase pressure

What type of Mechanical Advantage is demonstrated when a gear system speeds up or slows down the driven gear?

• Force Mechanical Advantage

• Distance Mechanical Advantage

• Speed Mechanical Advantage

• Pressure Mechanical Advantage

What is the function of a ratchet and pawl system?

• To prevent gears from rotating

• To rotate gears in opposite directions

• To control the flow of liquid

• To winch a boat onto a trailer

In a hydraulic jack, if the output plunger is wider than the input plunger, what happens to the mechanical advantage?

• It becomes negative

• It increases

• It remains the same

• It decreases

What happens when a fixed pulley is used in terms of the direction of movement?

• The load moves up and the effort goes down

• The load moves left and the effort goes right

• The load moves down and the effort goes up

• The load moves right and the effort goes left

What is the main purpose of a hydraulic system in a car jack?

• To control the steering of the car

• To adjust the suspension of the car

• To increase the speed of the car

• To lift the car so that wheels can be changed