TIL – I 6. Deneme Sınavı

For x>0, the expression 

its equal to:Deselect Answer

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Only one of the following statements is correct; identify which one.Deselect Answer

A car factory provides the customer with the possibility of choosing six different body colors for a car, two different interior fittings and three different types of alloy wheels. In how many different ways can the car be set up?

The prime factorization of the number (5⁴-5²)²3² is:Deselect Answer

Consider two spheres in space both of radius 2 and centers P₁ e P₂ respectively. If the distance between P₁ and P₂ is 3, then the intersection of the spheres is:

The sum of the ages of father and son is now 60 years. Eighty years from now the father's age will be three times his current age minus twice the son's current age. How old are father and son?

The equation log₂(x+5)⁴=4Deselect Answer

Which of these equations represents a straight line passing through the point (-1,-3) and perpendicular to the bisector of the first quadrant?

The figure shows the graph of the function

In a restaurant there are 24 square tables with 4 seats each, which can be arranged individually or combined to form a 6-seater table. Forming the same number of 4-seater and 6-seater tables, how many seats are obtained?

The equation (2x²-11)(x⁴-x²+5)=0Deselect Answer

The equation (x-1)²+y²=0 defines in the Cartesian planeDeselect Answer

The least common multiple of monomials 8x³y⁶, 6x²y⁶z², x⁴y³ isDeselect Answer

Chlorine is a mainstay in most swimming pools in the United States, and is used to eradicate bacteria. A bacteria-free pool will usually ensure that swimmers won’t contract a serious illness if they spend time in, and possibly ingest, the water.

When chlorine is added to pool water, a chemical reaction occurs whereby the chlorine breaks down into a legion of chemicals that combine to kill bacteria that may be in the water. These chemicals, specifically hypochlorous acid and hypochlorite ion, eliminate bacteria by annihilating and then oxidizing the abhorrent cells. When this chemical reaction occurs, the bacteria are rendered essentially harmless. This chemical reaction doesn’t occur immediately – individual components within chlorine take varying amounts of time to interact with the bacteria, creating an almost time-release-type of kill in the pool water.

Chlorine must be regularly replenished. As they react, the hypochlorous acid and hypochlorite ion combine to create a particular acceptable pH level in the pool water. A pH is a measure of the alkalinity and acidity present; a pH value of 7 represents a neutral value, and 7.4 is the pH value of the human tear. The pH ratio must be regularly monitored to ensure a consistent optimum rate – one usually kept within the spectrum of 7 to 8 as measured by a reliable pH measuring kit.

As the chemicals in chlorine complete their reactions, they break down and are no longer effective in keeping the pool water neutralized. Additional chlorine must be added to water at specific times. Outdoor pools that are in direct sunlight need to have water added more often because the chemical reaction time for chlorine is increased and its effectiveness is reduced in these conditions.

Since the hypochlorite ion is an especially potent chemical capable of fading fabrics and paint, most people are meticulous about rinsing chlorine from potentially affected areas. Although chlorine is inexpensive and widely available, some people find the bleach smell to be repugnant and the distinct aroma present at many swimming pools to be overwhelming. These people may not be able to enjoy aquatic pursuits in those pools that employ chlorine as a cleansing agent. Other people may find that inhaling chlorine at the high levels present around some pools may be difficult to tolerate. Still others may experience skin irritation after swimming in a pool containing chlorine. Although there are other chemicals and compounds available to clean swimming pools, they may be prohibitively expensive or incapable of killing all types of bacteria present in the water.


All of the following statements are true about chlorine EXCEPT:
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According to the passage, a stable pH value in pool water is dependent upon which of the following:Deselect Answer

The author’s primary purpose is toDeselect Answer

Based on the passage, which statement is probably NOT true of chlorine?Deselect Answer

Based on the information in the passage, which of the following statements is true about keeping pool water neutralized?
I.     Bacteria are kept at a tolerable level.
II.   Chlorine is being added at regular intervals.
III. The pH level is being constantly monitored.Deselect Answer

If the dollar amount of sales at Store P was 800,000 dolar for 2006, what was the dollar amount of sales at that store for 2008?Deselect Answer

The figure above represents a rectangular garden with a walkway around it. The garden is 18 feet long and 12 feet wide. The walkway is uniformly 3 feet wide, and its edges meet at right angles. What is the area of the walkway?Deselect Answer

Approximately what percent of the faculty in humanities are non-adjunct faculty?Deselect Answer

A washing machine takes 35 minutes to wash one load of laundry, and in between washing different loads of laundry it takes Derek 2 minutes to unload and another 4 minutes to reload the machine. If the washing machine begins washing one load of laundry at 12:30pm, how many loads of laundry can Derek wash and unload before 6:35pm?Deselect Answer

Randall purchased a shirt for 19.44 dolars using a 20 dolars bill. If his correct change was returned in only dimes (0.10 dolars)  and  pennies (0.01 dolars), how many coins could Randall have received?Deselect Answer

In a science fiction film, there is a scene on the Lunar surface in which an astronaut becomes aware of the arrival of a spaceship by hearing the noise of its engines. This scene is physically inconsistent because:

A car, initially at rest, moves along a line with constant acceleration equal to 10m/s². What will be the velocity of the car after 45m?

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Two capacitors have capacitances C₁,C₂ (with C₁>C₂) and charges whose respective absolute values are Q₁,Q₂. One can deduce that

Consider two blocks of the same material, one of mass 5kg, the other of mass 10kg. Initially, the two blocks have equal temperature 300K. Suppose that they are then both heated to a temperature of 500K. One can assert thatDeselect Answer

A current of 10A passes through a resistor, across which the voltage is 220V. The power dissipated is

Two planets undertake uniform circular motion around a star. For the two planets, the mass, speed and distance from the star's centre is repectively m,v,r and m',v',r'. If r' = 4r, the ratio T'/T of the periods of revolution of the planets is

In the electric field, which one of the following relations concernig "volt" unit of measure is correct?

Whilst travelling by train, a passenger is able to detect the passage of one of the wheels across the joins of the track. The passenger counts 240 in two minutes and each piece of track is 15 metres long. What is the speed of the train (assumed to be constant)?

Two canisters hold equals volumes of gas held at the same temperature and pressure. One contains H₂ (molecular mass equal to 2) and the other N₂ (molecular mass equal to 28).

The "if" keyword, in programming languages like C or Python, is:

A path like  /home/paolo/examples.txt is:

Indicate in which historical period the descriptive geometry has been geometrically coded

What kind of representation is used in the figure?

At what scale is it preferable to represent a complex object with an approximate size of 100x100x100 mm?Deselect Answer

What does the program print after execution?Deselect Answer