Free CAAS SAR-66 Physics (M02), Category B1 Practice Questions

Sample Practice Questions

Try these 10 sample questions from the CAAS SAR-66 Physics (M02), Category B1 practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1Which description correctly defines the term chemical element?

   1. A.A substance separable into simpler substances by filtration
   2. B.A substance that cannot be simplified by chemical meansCorrect answer: B
   3. C.A substance formed by chemically combining different elements
   4. D.A substance consisting of physically mixed chemical compounds

   Explanation: FAA Aviation Maintenance Technician Handbook—General states: "An element is a substance that cannot be reduced to a simpler form by chemical means." Chemical irreducibility defines an element. Filtration concerns mixtures; combining different elements forms a compound; physically mixed compounds are also a mixture.

   Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — Element

2. 2What information must be specified to describe a force as a vector?

   1. A.Magnitude together with its directionCorrect answer: A
   2. B.Magnitude, regardless of its direction
   3. C.Direction, regardless of its magnitude
   4. D.Magnitude together with its duration

   Explanation: NASA states: "Vector quantities have two characteristics, a magnitude and a direction." Both are necessary. Magnitude alone describes a scalar; direction alone omits size; duration does not replace direction.

   Reference: NASA Glenn — Vectors and Scalars — Vectors and Scalars, vector characteristics

3. 3A temperature indicator reads 20 °C. What is the equivalent Fahrenheit temperature?

   1. A.36 °F
   2. B.52 °F
   3. C.68 °FCorrect answer: C
   4. D.104 °F

   Explanation: FAA Aviation Maintenance Technician Handbook—General states: "Degrees Fahrenheit = (1.8 × Degrees Celsius) + 32" F=1.8×20+32=68 °F.36 omits the offset,52 adds20 to32 without scaling, and104 incorrectly doubles the Celsius value before conversion.

   Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — Temperature

4. 4What is the approximate speed of visible light in a vacuum?

   1. A.30,000,000 m/s
   2. B.300,000,000 m/sCorrect answer: B
   3. C.3,000,000,000 m/s
   4. D.30,000,000,000 m/s

   Explanation: OpenStax states: "c=2.99792458×108 m/s≈3.00×108m/s" Thus the approximate vacuum speed is300,000,000 m/s.30,000,000 is ten times too small;3,000,000,000 and30,000,000,000 are ten and one hundred times too large.

   Reference: OpenStax College Physics 2e — The Law of Refraction — The Law of Refraction — Speed of Light

5. 5In a longitudinal sound wave travelling through air, how do air particles oscillate relative to the direction of wave propagation?

   1. A.Perpendicular to the direction of propagation
   2. B.Around stationary circular paths normal to propagation
   3. C.Parallel to the direction of propagationCorrect answer: C
   4. D.Continuously forward without returning

   Explanation: FAA Aviation Maintenance Technician Handbook—General states: "the particles of the medium vibrate back and forth longitudinally in the direction of propagation." Longitudinal waves involve back-and-forth particle motion along the wave direction. Perpendicular motion describes a transverse model; continuous transport confuses wave propagation with bulk flow.

   Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — Wave Motion

6. 6Why is pure water classified as a compound?

   1. A.Its molecules move randomly in the liquid state
   2. B.It can change from a liquid into a gas
   3. C.Its hydrogen and oxygen are chemically combinedCorrect answer: C
   4. D.Its components can settle into separate layers

   Explanation: FAA Aviation Maintenance Technician Handbook—General states: "A compound is a chemical combination of two or more elements." Water combines hydrogen and oxygen chemically. Molecular motion and phase changes do not define compounds, and settling would describe a separable mixture.

   Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — Compound

7. 7A force of 80 N acts perpendicular to a spanner at a distance of 0.30 m from the bolt axis. What moment does it produce?

   1. A.0.00375 N·m
   2. B.24 N·mCorrect answer: B
   3. C.80.3 N·m
   4. D.267 N·m

   Explanation: FAA Aviation Maintenance Technician Handbook—General states: "Torque = F x d" Moment = 80 N × 0.30 m = 24 N·m. Dividing distance by force gives 0.00375, adding gives 80.3, and dividing force by distance gives about 267; none follows the moment relation.

   Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — lever torque

8. 8Which pair of readings is required when using the combined ideal-gas relation PV/T = constant for a fixed quantity of gas?

   1. A.Gauge pressure and Celsius temperature
   2. B.Absolute pressure and Kelvin temperatureCorrect answer: B
   3. C.Gauge pressure and Fahrenheit temperature
   4. D.Absolute pressure and Celsius temperature

   Explanation: FAA Aviation Maintenance Technician Handbook—General states: "When using the general gas law formula, temperature and pressure must be in the absolute." Pressure must be absolute and temperature must be on an absolute scale such as Kelvin. Gauge pressure and Celsius/Fahrenheit zeros do not represent zero absolute pressure or temperature.

   Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — General Gas Law

9. 9A ray strikes a plane mirror at 35° to the normal. At what angle to the normal is it reflected?

   1. A.17.5°
   2. B.35°Correct answer: B
   3. C.55°
   4. D.70°

   Explanation: OpenStax College Physics 2e — The Law of Reflection states: "The angle of reflection equals the angle of incidence." Both angles are measured from the normal, so the reflected angle is35°.55° uses the surface instead,70° doubles the incidence angle, and17.5° halves it.

   Reference: OpenStax College Physics 2e — The Law of Reflection — The Law of Reflection — law statement

10. 10A vibrating bell is placed inside an evacuated chamber. Why can its sound not travel across the ideal vacuum to an external listener?

    1. A.There is no material medium to carry the soundCorrect answer: A
    2. B.The bell cannot vibrate when pressure is low
    3. C.The sound becomes electromagnetic radiation
    4. D.Its frequency must fall to zero in a vacuum

    Explanation: FAA Aviation Maintenance Technician Handbook—General states: "These are the source, a medium for carrying the sound, and the detector." Sound requires a material medium. The bell can still vibrate, but a vacuum cannot transmit its mechanical pressure disturbance; evacuation does not turn it into electromagnetic sound or force zero source frequency.

    Reference: FAA Aviation Maintenance Technician Handbook—General — Aviation Maintenance Technician Handbook — Sound