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Choose the suitable answer that makes the sentence right. 1- Energy used in the physical state transformation process is ------------ in the new physical state of the objects. a- destroyed b- vanished c- contained d- terminated 2- Energy is what it takes to -------- the physical state of an object. a- change b- understand c- know d- watch 3- Work is the amount of energy transferred by a -------- acting through a distance. a- force b- car c- way d- man 4- When a force acts on an object at rest and succeeds to move it through a certain distance along the line of its action, we say that ------ is done. a- force b- energy c- work d- power 5- ----------- energy is the energy stored inside the body due to its position from Earth’s surface. a- Kinetic b- Potential c- Solar d- Thermal 6- ---------- energy is the energy gained by the body due to its movement. a- Kinetic b- Potential c- Sound d- Chemical 7- Energy never-------. Energy only changes into different forms. a- vanishes b- persists c- insists d- contains 8- -------- of an energy conversion is the ratio between the part of the energy that caused the desired effect and the total energy used. a- Efficiency b- Process c- Amount d- Forms 9- A battery is an example of energy conversion from chemical energy to --------- energy. a- solar b- thermal c- electric d- kinetic 10- A turbine changes -------- energy into electric energy. a- kinetic b- potential c- chemical d- light 11- Efficiency is the ratio of the part of output energy that is beneficial to us and the total ------ energy. a- rejected b- used c- kinetic d- sound 12- Power is a measure of how fast ------- is converted. a- force b- energy c- heat d- work 13- Which of the following heaters can heat up a gallon of water to 90oC? a- 5 W heater b- 90 W heater c- 100 W heater d- All of the above 14- Which of the following heaters can heat up a gallon of water from 10oC to 90oC faster? a- 5 W heater b- 90 W heater c- 100 W heater d- All heaters above will take the same amount of time. 15- Which equipment will cost you more to run? a- A 5 W piece of equipment. b- A 50 W piece of equipment. c- A 100 W piece of equipment. d- Insufficient information. 16- When a current flows through a circuit experiencing a voltage drop, this circuit is ---------- power. a- producing b- consuming c- storing d- manufacturing 17- A practical voltage source’s output voltage ------- as more current is drawn from it. a- drops b- increases c- charges d- raises 18- In a mechanical system, energy (or power) transmission involves two physical quantities: a- Force and speed. b- Mass and weight. c- Light and sound d- All items above. 19- Lift jack -------- an operator to lift a very heavy weight (at a slow speed). a- prevents b- allows c- disables d- delays 20- Voltage in an electrical circuit is analogous to --------- in a hydraulic system. (a) fluid flow rate (b) speed of the hydraulic motor (c) volume of the hydraulic fluid (d) pressure 21- A theoretical voltage source: a) its voltage will be loaded down if too much current is drawn from it. b) its voltage will increase if too much current is drawn from it. c) always maintains a constant voltage. d) reaches a peak output power at a certain output current.