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ASVAB CH6: MECHANICAL COMPREHENSION EXAM
QUESTIONS
Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -26 Questions and Answers
-Format: Multiple-choice / Flashcard
Question 1: What are bevel gears?
Answer:
Bevel Gear:
-Gears that are cut on same slant of a cone -Typically meshed at right angles, however are able to mesh at other angles
Worm Gear:
-Consists of worm and worm wheel -Single thread worm has one tooth that's form of screw thread -Worm always drives worm wheel -Transmits rotational motion at right angles like bevel gears -Used in situations where high speed reduction is needed
Question 2: What is a barometer?
Answer:
Barometer:
-Atmospheric pressure
Tachometer:
-Measure rotary speed
Beam Balance:
-Weigh objects by bringing lever rotating around fulcrum into equilibrium
Spring Balance:
-Measures object weight based upon how far spring is stretched
Pressure Gauge:
-Measure gas/liquid pressure
Question 3: What are helical spur gear?
Answer:
Spur Gears:
-Wheels are in same plane and axles are parallel
Helical Spur Gears:
-Kind of spur gear which teeth are set at an angle -Quieter and smoother than regular spur gear
Question 4: What is a driven gear?
Answer:
Driven Gear:
-Last gear in gear chain
Idler Gears:
-Gears in gear chain between driver and driven gear
Gear Ratio:
-Mechanical advantage measurement of a gear system
Question 5: What is a screw?
Answer:
-Inclined plane wrapped around a cylinder
Screw Ideal Mechanical Advantage:
Circumference Of Rotation / Lead Of Screw Thread Pie D / Lead Of Screw Thread
Question 6: What is a spur gear?
Answer:
Spur Gears:
-Wheels are in same plane and axles are parallel
Helical Spur Gears:
-Kind of spur gear which teeth are set at an angle -Quieter and smoother than regular spur gear
Question 7: What is a shut off valve?
Answer:
Shut Off Valve:
-Valve that closes or opens path of a fluid
Anti-Reversal Valve:
-One way flowing valve
Throttling Valve:
-Controls amount of fluid flow by widening narrowing pathway
Question 8: What is a idler gear?
Answer:
Driven Gear:
-Last gear in gear chain
Idler Gears:
-Gears in gear chain between driver and driven gear
Gear Ratio:
-Mechanical advantage measurement of a gear system
Question 9: What is a throttling valve?
Answer:
Shut Off Valve:
-Valve that closes or opens path of a fluid
Anti-Reversal Valve:
-One way flowing valve
Throttling Valve:
-Controls amount of fluid flow by widening narrowing pathway
Question 10: What is a pressure gauge?
Answer:
Barometer:
-Atmospheric pressure
Tachometer:
-Measure rotary speed
Beam Balance:
-Weigh objects by bringing lever rotating around fulcrum into equilibrium
Spring Balance:
-Measures object weight based upon how far spring is stretched
Pressure Gauge:
-Measure gas/liquid pressure
Question 11: What are CAMS?
Answer:
-Wheel that turns on an axis that is off-center -Turns rotating motion into up/down motion
Question 12: What is an anti-reversal valve?
Answer:
Shut Off Valve:
-Valve that closes or opens path of a fluid
Anti-Reversal Valve:
-One way flowing valve
Throttling Valve:
-Controls amount of fluid flow by widening narrowing pathway
Question 13: What are worm gears?
Answer:
Bevel Gear:
-Gears that are cut on same slant of a cone -Typically meshed at right angles, however are able to mesh at other angles
Worm Gear:
-Consists of worm and worm wheel -Single thread worm has one tooth that's form of screw thread -Worm always drives worm wheel -Transmits rotational motion at right angles like bevel gears -Used in situations where high speed reduction is needed
Question 14: What is a beam balance?
Answer:
Barometer:
-Atmospheric pressure
Tachometer:
-Measure rotary speed
Beam Balance:
-Weigh objects by bringing lever rotating around fulcrum into equilibrium
Spring Balance:
-Measures object weight based upon how far spring is stretched
Pressure Gauge:
-Measure gas/liquid pressure
Question 15: What is a spring balance?
Answer:
Barometer:
-Atmospheric pressure
Tachometer:
-Measure rotary speed
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