NLN NEX - SCIENCE QUESTIONS

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NLN NEX - SCIENCE QUESTIONS /

90 QUIZZES WITH CERTIFIED

SOLUTION

Question 1: 1 kilogram (kg) of solid X at 10°C and 1 kg

of solid Y at 10°C each absorb 5 joules of heat energy.The final temperatures of X and Y are 15°C and 20°C, respectively. Compared to X, Y must have a lower

• specific heat
• conductive heat
• heat of fusion
• heat of vaporization

CORRECT ANSWER: specific heat

Question 2: A method for determining the blood alcohol

content of a subject is to

• do a mantoux test
• do a D-dimer test
• use a breathalyzer

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• inspect the size of the pupils

CORRECT ANSWER: use a breathalyzer

Question 3: A person who was in an auto accident has

formed a blood clot at the site of injury. One event that can lead to formation of a blood clot is that

• red blood cells release hemoglobin
• white blood cells release antibodies
• bone marrow cells release platelet production
• ruptured platelets release thromboplastin

CORRECT ANSWER: ruptured platelets release

thromboplastin

Question 4: A physician measures the pulse and blood

pressure of all patients on a routine basis. Which of these measurements show the normal BP values for a resting adult patient

• 125/95 mm Hg

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• 100/80 mm Hg
• 120/80 mm Hg
• 72/120 mm Hg

CORRECT ANSWER: 120/80 mm Hg

Question 5: A student focuses sunlight to a point with a

thin converging (convex) lens. Which of these direct measurements can the student make as a result of this experiment

• The approximate wavelength of the light used
• The approximate speed of the light
• The approximate focal length of the lens
• The approximate index of refraction of the lens

material

CORRECT ANSWER: the approximate focal length of

the lens

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Question 6: A woman suddenly chokes on a piece of food

and clutches frantically at her throat. An immediate remedy is to

• have her bend forward and tell her to cough
• insert a finger or a blunt object toward the back of the

mouth

• apply quick, hard pressure successively to her

abdomen, just beneath her diaphragm

• phone emergency for help

CORRECT ANSWER: apply quick, hard pressure

successively to her abdomen, just beneath her diaphragm

Question 7: An unknown gas is more dense than air, does

not support combustion, and turns a limewater solution cloudy. This gas is most probably

• methane
• ammonia
• carbon dioxide
• hydrogen