Paper 2 H - SAMPLE SET 1 Q4
(4) (a) Figure 8 shows an airport worker refuelling an aircraft.
(i) Pumping fuel into an aircraft can be dangerous.
The worker connects an earth wire to the aircraft before pumping fuel.
Give one reason why earthing reduces the risk of fire. (1)
(ii) Explain how an aircraft can become electrically charged as it flies through the air. (2)
(b) Fuel weighing 230000N is pumped into the aircraft.
This fuel moves upwards through a vertical height of 4.7m.
The power developed by the pump is 1600W.
Calculate the time needed to refuel the aircraft. (3)
The worker connects an earth wire to the aircraft before pumping fuel.
Give one reason why earthing reduces the risk of fire. (1)
(ii) Explain how an aircraft can become electrically charged as it flies through the air. (2)
(b) Fuel weighing 230000N is pumped into the aircraft.
This fuel moves upwards through a vertical height of 4.7m.
The power developed by the pump is 1600W.
Calculate the time needed to refuel the aircraft. (3)
time = ............................................... s
(c) Figure 9 shows an electrostatic method for spray-painting a car door.
The car door has a negative charge.
The droplets of paint receive a positive charge as they leave the spray gun.
The car door has a negative charge.
The droplets of paint receive a positive charge as they leave the spray gun.
Explain how charging the door helps the paint to form an even coating on both sides of the door.
You should use ideas of forces and fields in your answer. (2)
(Total for Question 4 = 8 mark)
You should use ideas of forces and fields in your answer. (2)
(Total for Question 4 = 8 mark)