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Multiple Choice



1

The SI system of quantifying units is used because
A)it ensures standardization.
B)makes comparisons of published data easier.
C)it has been endorsed by numerous journals.
D)all of the above are true.
2

The units used for work are
A)Newtons or Newton-meters.
B)joules or kilo pond-meters.
C)watts or joules.
D)Newton-meters or kilo pond-meters.
3

If you push a 10 kg weight up a vertical distance of 5 meters, the work performed would be
A)2 kilo pond-meters.
B)50 joules.
C)2 joules.
D)50 kilo pond-meters.
4

The units used for power are
A)Newtons or kilo pond-meters per second.
B)joules or kilo pond-meters.
C)watts or kilo pond-meters per second.
D)Newton-meters or joules per second.
5

How much power would it take to complete the task described in question 3 in 5 seconds?
A)10 joules per second
B)0.2 kilo pond-meters per second
C)10 kilo pond-meters per second
D)0.2 joules per second
6

The power output of the girl in question 6 is
A)600 watts.
B)600 kilo pond-meters per minute.
C)7 watts.
D)7 watts per minute.
7

What is the work output of 20 minutes of bicycle ergometry at 60 rpm, with a resistance of 2 Kg and the distance traveled per revolution being 6 meters ?
A)7200 kilo pond-meters
B)7200 joules
C)14400 kilo pond-meters
D)none of the above
8

The power output of the previous problem is
A)1440 kilo pond-meters per minute.
B)720 kilo pond-meters per minute.
C)1440 watts.
D)720 watts.
9

It is not possible to calculate the work performed on a treadmill while
A)the treadmill is on an incline.
B)the incline is less than 10%.
C)the treadmill is horizontal.
D)none of the above is true.
10

The work performed by an 80 kg subject running for 5 minutes on a treadmill that is traveling at 300 meters per minute at an incline of 7.5% is
A)112.5 kilo joules.
B)112.5 joules.
C)112.5 kilo pond-meters.
D)9000 kilo pond-meters.
11

Direct calorimetry measures
A)metabolic rate through oxygen consumption.
B)metabolic rate through heat production.
C)oxygen consumption with open circuit spirometry.
D)oxygen consumption with closed circuit spirometry.
12

The energy liberated when fat is metabolized is
A)5.05 kcal.
B)19.7 kcal.
C)4.7 kcal.
D)21.13 kcal.
13

The caloric expenditure as a result of the metabolism of 1 Liter of O2 is approximately
A)5 kcal.
B)21 Kj.
C)21 kcal.
D)both a and b.
14

A person exercising at an oxygen consumption of 5.0 liters/min. would expend around
A)10 kcal/min.
B)1 kcal/min.
C)17.5 kcal/min.
D)25 kcal/min.
15

The most common technique used to measure energy expenditure uses
A)a calorimeter.
B)the energy of the foods eaten.
C)closed circuit spirometry.
D)open circuit spirometry.
16

Net efficiency is defined as the ratio of
A)work output to resting energy expenditure.
B)work output to energy expenditure above rest.
C)resting energy expenditure to work output.
D)energy expenditure above rest to work output.
17

The efficiency of exercise is influenced by
A)exercise work rate.
B)speed of movement.
C)fiber composition of muscles performing the exercise.
D)all of the above.
18

A difference in efficiency between muscle fibers is due to
A)different size of the fibers.
B)different requirements in ATP per unit of work.
C)different requirements in substrate per unit of work.
D)all of the above.
19

The relationship between work rate and energy expenditure is
A)exponential.
B)linear.
C)curvilinear.
D)inverse.





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