Fluids KITE Questions

The diameter of the cylinder under the car at Piston 2 is 3 feet. The diameter of the cylinder at Piston 1 is 6 inches. What is the area in square feet (ft²) of the circular surface of each piston? [Use 3.14 for π.]

• A₁ = 7 ft²; A₂ = 0.2 ft²

• A₁ = 0.8 ft²; A₂ = 28 ft²

• A₁ = 0.2 ft²; A₂ = 7 ft²

• A₁ = 28 ft²; A₂ = 7 ft²

This hydraulic lift is designed to lift a 3,000-pound car. The diameter of the cylinder under the car at Piston 2 is 3 feet. The diameter of the cylinder at Piston 1 is 6 inches. How much pressure, in pounds per square foot (lb/ft²) or pounds per square inch (psi), does Piston 2 exert on the hydraulic liquid?

• 21,000 lb/ft²

• 429 lb/ft²

• 145.83333 psi

• 429 psi

This hydraulic lift is designed to lift a 3,000-pound car. The diameter of the cylinder under the car at Piston 2 is 3 feet. The diameter of the cylinder at Piston 1 is 6 inches. How much work does Piston 1 do to lift the car 2 feet (ft)? Round your answer to the nearest whole number.

• 3000 ft-lb

• 6000 ft-lb

• 1500 ft-lb

• 15000 ft-lb

This hydraulic lift is designed to lift a 3,000-pound car. The diameter of the cylinder under the car at Piston 2 is 3 feet. The diameter of the cylinder at Piston 1 is 6 inches. What is the mechanical advantage of this hydraulic system? Enter your answer rounded to the nearest whole number.

• 7

• 1

• 35

• 65

This hydraulic lift is designed to lift a 3,000-pound car. The diameter of the cylinder under the car at Piston 2 is 3 feet. The diameter of the cylinder at Piston 1 is 6 inches. The main line in the hydraulic lift has a leak and needs to be replaced. What diameter does the new line need to be if the flow rate is 2500 cubic inches per minute (in.^3/min) and the flow velocity is 795 inches per minute (in./min)?

• 1.0 in.

• 1.5 in.

• 2.0 in.

• 2.5 in.

Engineering students are collaborating on a design for a pneumatic cylindrical device. They need the output pressure to be 4.5 psi with a force of 30 lb. What diameter does the cylinder need to be to produce these results?

• 2.91 in.

• 1.46 in.

• 2.12 in.

• 0.44 in.

Which of the following systems uses fluid power applications?

• hydraulic brake system in a semi truck

• gear system in a car

• lever on a crane

• program on a CNC machine

An operator has a problem with a bearing system in a machine. Which of the following oil characteristics can the operator use to make comparisons on the machine's oil hydrodynamic classifications?

• temperature

• pressure

• flow velocity

• volume

A device on an assembly line uses a pneumatic cylinder that produces 125 lb/in² of gauge pressure to push products off the line. What is the required diameter of the pneumatic cylinder that is needed to move products that weigh 300 lb?

• 1.75-inch diameter

• 0.87-inch diameter

• 0.36-inch diameter

• 0.13-inch diameter

At midday, the pressure gauge on a 230 in.^3 propane tank reads 150 lb/in.^2. By the evening, the temperature inside the tank falls to 65°F and the pressure gauge reads 110 lb/in.^2. What was the absolute temperature at midday?

• 715 Rankin

• 89 Rankin

• 385 Rankin

• 48 Rankin