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ASVAB MECHANICAL COMPREHENSION PRACTICE TEST
Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -41 Questions and Answers
-Format: Multiple-choice / Flashcard
Question 1: A car merging onto the highway accelerates uniformly from 16 m/s to 28 m/s in 4.38 seconds. What is the acceleration of the car?
Answer:
2.7 m/s^2 Question 2: A race car with 1,400 kg mass is racing with a momentum of 77,000 kg m/s south down a straightaway. What is the velocity of the car?
Answer:
55 m/s Question 3: The smaller gear has 8 teeth, and the larger gear has 16 teeth. When the larger gear makes 12 revolutions, how many revolutions will the smaller gear make?
Answer:
24 Question 4: If a 180 RPM synchronous motor and gear train rated for 60Hz is run on 50Hz, what speed will the output shaft have?
Answer:
150 RPM
Question 5: Which of the following is the basis for Pascal's Law?
Answer:
The amplification of force in a hydraulic system.Question 6: Two gears are in mesh. The first gear is rotating at 60 rpm and has 23 teeth. The second gear is rotating at 5 rpm. How many teeth does the second gear have?
Answer:
276 teeth Question 7: A fish tank at an aquarium contains several cubic feet of water (1 cubic foot of water = 62.5 pounds). If the fish tank is 6 feet deep, 12 feet wide, and 13 feet long, what's the approximate pressure at the bottom of the tank in pounds per square inch?
Answer:
2.5 Question 8: Given two pieces of steel tubing, one 8 feet long, the other 6 feet long, both joined at one end at an angle of 90 degrees, how long would a third piece need to be to connect the two free ends?
Answer:
10 feet
Question 9: What type of simple machine is pictured above?
Answer:
Second-class lever
Question 10: Choose the true statement.
Answer:
Jerk is the derivative of acceleration
Question 11: How much force is needed to lift the 10Kg weight?
Answer:
5kg
Question 12: One horsepower is equivalent to
Answer:
746 watts Question 13: Which of the following describes the relationship between kinetic energy, mass, and velocity?
Answer:
2(KE) = mv2 Question 14: How much work is performed lifting in order to lift a 50.0 kg block 7.00 meters?Use g=9.81 m/s^2
Answer:
3430 N*m Question 15: If a round from an AK-47 is fired straight up (90 degrees from level) and wind to the northwest is blowing at 15 mph, what will be the minimum speed of the round before it strikes the ground?
Answer:
Cannot be determined from the information given.Question 16: How is the coefficient of friction calculated?How is the coefficient of friction calculated?
Answer:
It is the friction force divided by the normal force
Question 17: Which of the following units do not describe pressure?
Answer:
lbf/in^3 Question 18: What is the rotation speed of a synchronous motor with 4 poles run on 60Hz.
Answer:
1800 RPM
Question 19: What is the difference between mass and weight?
Answer:
Weight is a force, it takes gravity into account Question 20: If a cubic yard of sand weighs 1.5 (US) tons, how many 11x6x7 inch ammo boxes can be completely filled with 1 ton of sand?
Answer:
67
Question 21: What force is needed to accelerate a 7kg scooter 4.2 m/s?
Answer:
29.4 N
Question 22: An 80-lb child is sitting on one end of a seesaw. If another 80-lb child jumps from a high platform onto the other end of the seesaw, what will happen?
Answer:
The first child will be lifted into the air, but remain seated.Question 23: A roller coaster starts at rest at the top of a 51-meter-high frictionless track. At the bottom of the track, what is the approximate speed of the roller coaster?
Answer:
32 m/s
Question 24: What is a vector quantity?
Answer:
gravity Question 25: If at Location A pure water boils at 212 degrees Fahrenheit and at Location B the same water boils at 80 degrees Celsius, what can you deduce about the two locations?
Answer:
Location A is at sea level and Location B is significantly higher.
Question 26: What are the units for the coefficient of friction?
Answer:
Unitless
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