Free ASVAB Practice Tests

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Sample Practice Test Questions

Electronics Information

Which of the following statements about electrical resistance is true?

the more resistive the conductor is the slower electron flow will be

Resistance is opposition to the flow of current. As resistance increases, current decreases as resistance and current are inversely proportional.

Math Knowledge

Find the value of b:
5b + z = -1
-2b - 3z = -3

-\(\frac{6}{13}\)

You need to find the value of b so solve the first equation in terms of z:

5b + z = -1
z = -1 - 5b

then substitute the result (-1 - 5b) into the second equation:

-2b - 3(-1 - 5b) = -3
-2b + (-3 x -1) + (-3 x -5b) = -3
-2b + 3 + 15b = -3
-2b + 15b = -3 - 3
13b = -6
b = \( \frac{-6}{13} \)
b = -\(\frac{6}{13}\)

Shop Information

What is a micrometer used for?

measuring the diameter of cylindrical objects with high precision

Micrometers provide accuracy to the thousandths of an inch and come in outside and inside varieties. An outside micrometer is used to measure outside thickness, such as the diameter of a bolt, while an inside micrometer is used to measure the inside dimension of an object, such as the diameter of the hole of a nut or the width of a channel.

Word Knowledge
The meticulous detective found every shred of evidence at the crime scene.
fastidious
Extrememly careful regarding details.
Electronics Information

Which of the following is not a characteristic of direct current?

an example power source is a generator

Direct current flows in only one direction in a circuit, from the negative terminal of the voltage source to the positive. A common source of DC is a battery. In contrast to the constant one-way flow of direct current, alternating current changes direction many times each second. Electricity is delivered from power stations to customers as AC because it provides a more efficient way to transport electricity over long distances.

Word Knowledge
Onset most nearly means:
start
Beginning.
Shop Information

Which of the following would be used to make a drilling guide mark in a sheet of metal?

center punch

A punch is narrow and is used to drive objects like nails (pin punch) or for making guide marks for drilling (center punch) or patterns in wood or metal.

General Science

What is the body's largest artery?

aorta

The aorta is the body's largest artery and receives blood from the pulmonary vein via the left ventricle. From there, blood is circulated through the rest of the body through smaller arteries called arterioles that branch out from the heart. Finally, blood is delivered to bodily tissues through capillaries.

Automotive Information

The radiator is responsible for tranferring heat from the coolant to:

outside air

The radiator is responsible for tranferring heat from the coolant to the outside air. Radiator hoses transfer coolant to and from the engine to the radiator and a radiator cap maintains pressure in the cooling system to increase the boiling point of the coolant mixture and thus allow it to absorb more heat.

Automotive Information

Cylinder air and fuel intake valves, exhaust valves, and mounts for spark plugs and fuel injectors are contained in the:

head gasket

Cylinders act as a guide for the pistons that translate the heat energy of combustion into the mechanical energy necessary to move a vehicle. Piston rings seal the piston to the cylinder to contain combustion gases and also regulate the oil distribution between the piston and cylinder wall. A cylinder head closes in the top of the cylinder forming the combustion chamber which is sealed by a head gasket (head). The head provides space for air and fuel intake valves, exhaust valves, and mounts for spark plugs and fuel injectors.