The ACT® WorkKeys Applied Technology Free Practice Test

When switching the electrical switch on, the electrical circuit will be closed and bulb 3 will light up. Bulb 2 is dysfunctional so it cannot light up. Additionally, it breaks the electrical circuit, thereby blocking the electric current from reaching bulb 1. Consequenctly, bulb 1 will not light up either.

The correct answer is C

You can see that the two systems are virtually identical, with the exception of the position of the pump in the smaller tank.

In the first system, the pump suctions from the bottom of the tank, whereas in the second system, the pump suctions from the middle of the tank; In practical terms, in the first system (A), the pump will start suctioning right away whilst in the second system (B), the smaller tank will have to be at least half full in order for the pump to start suctioning.

Therefore, container V will begin to fill in system A before it does in system B.

The correct answer is A

All the other answers cannot explain the situation: answers (A) and (B) would produce no water whatsoever, while answer (C) would produce cold water.

The correct answer is D

As is visible in the drawing, the ball is accelerating downwards. (The distance crossed in the first second is smaller than the distance in the second.) Playing the video in reverse will show the ball falling up, albeit slower with each passing second. Therefore, the acceleration is always pointing downwards.

Answer (B) is wrong. The idea behind this is that both groups will see the same change in velocity between each second. In each sketch, there is a different speed to be seen, so acceleration is present. Group one will see the stone falling down with greater and greater speed (acceleration downward), while group 2 will see the stone falling up, but slower and slower (still, acceleration downward).

Answer (C) is misleading as you might mistake speed for acceleration. The same goes for answer (E).

Answer (D) may confuse those who do not properly understand free fall and acceleration. By definition, a free-falling object is accelerating toward the center of the Earth.

The correct answer is A

Electric charges cannot be created, only transported, so the total amount of charge in a system must remain constant. Because the new globe is not touching the two original globes, there is no charge being transported. Originally the two globes had a charge of 2q. Therefore, the unmeasured globe must have a charge of 3q.

The correct answer is C

The pressurestat is the only element that can explain all the problems you have experienced. If the pressurestat was damaged, the heating would not stop upon reaching a certain pressure, thus causing a higher pressure (strength) steam jet. In addition, the high pressure/temperature of the water/steam that would be the result of a malfunctioning pressurestat could, in turn, "burn" the coffee.

Answer (A) is incorrect because if the heating element were damaged, there would be no hot water and no steam.

Answer (B) is incorrect because if the heat exchanger were damaged, the coffee would either be cold or too hot, but it would not affect the steam.

Answer (C) is incorrect because if the pump were damaged, there would be no steam or water.

Answer (E) is wrong because it is just a pipe. It has no effect on the steam or temperature of the water.

The correct answer is D

By measuring the rotational speed of the cog wheel and knowing the distance of the tunnel, one can deduce the speed of light, as the light must pass through the holes between the cog wheel's teeth
The reader must be able to interpret all the information given and understand the logic that will allow them to deduce the speed of light.

S1 and S2 are just mirrors, where S1 is built to reflect some of the light and to let some of it pass.

The experiment is built in in the following way:

The cogwheel is placed in such a way that it can completely block the light source with its teeth, or it can allow some of the light through between its teeth. The light pulse then travels along the tunnel and back, and can only pass through the cogwheel if its teeth are out of the way, where it is then detected by the detector. In short, you start spinning the cogwheel until there is nothing on the detector, and then start to spin it faster or slower, until you get a blip on the detector. If you know the speed at which the cogwheel is spinning, the size of its teeth, and the distance that the light must cross, you can pack it all together in a formula to get the speed of light. After all, speed is nothing more than distance divided by time.

If the distance between mirrors is h, the time between the first and second reflections on the rotating mirror is 2h/c (c = speed of light). If the mirror rotates at a known constant angular rate ω, it changes angle during the light roundtrip by an amount θ given by:

θ = 2 h ω/ c = ω t

The speed of light is calculated from the observed angle θ, known angular speed ω and measured distance h as:

c = 2 ω h /θ

The correct answer is B