ALBERTA HEAVY EQUIPMENT
TECHNICIAN FIRST PERIOD AIT EXAM
STUDY GUIDE QUESTIONS WITH
CORRECT ANSWERS AND
EXPLANATIONS
1. When using a micrometer, what is the specific purpose of the ratchet stop or friction
thimble?
A. To lock the spindle in place once the measurement is taken
B. To speed up the adjustment process when measuring different sized parts
C. To ensure consistent pressure is applied between the spindle, anvil, and workpiece
D. To calibrate the micrometer to zero before use
Answer: C
Conceptual Explanation: The ratchet stop or friction thimble ensures that the same
amount of pressure is applied for every measurement, which is critical for accuracy and
repeatability across different users.
2. A bolt marked with three radial lines on its head belongs to which SAE grade?
A. Grade 2
B. Grade 8
,C. Grade 9
D. Grade 5
Answer: D
Conceptual Explanation: SAE Grade 5 bolts are identified by three radial lines on the
head. Grade 8 bolts have six radial lines, and Grade 2 bolts have no markings.
3. In a series electrical circuit, what happens to the total resistance if an additional load is
added?
A. The total resistance increases
B. The total resistance remains the same
C. The total resistance decreases
D. The total resistance becomes zero
Answer: A
Conceptual Explanation: In a series circuit, total resistance is the sum of all individual
resistances (Rt = R1 + R2 + …). Therefore, adding a load increases the total resistance.
4. According to Pascal’s Law, what happens to pressure applied to a confined fluid?
A. It increases as the volume of the container increases
B. It decreases as the distance from the source increases
C. It is only transmitted in the direction of the flow
, D. It is transmitted undiminished in all directions
Answer: D
Conceptual Explanation: Pascal’s Law states that pressure exerted anywhere in a
confined incompressible fluid is transmitted equally in all directions throughout the fluid.
5. Which engine component is responsible for converting the reciprocating motion of the
pistons into rotary motion?
A. The camshaft
B. The connecting rod
C. The flywheel
D. The crankshaft
Answer: D
Conceptual Explanation: The crankshaft is designed with offsets (throws) that allow it to
convert the linear (reciprocating) motion of the pistons into rotational force.
6. What is the primary function of a piston’s compression rings?
A. To scrape excess oil from the cylinder wall
B. To support the piston pin and connect to the rod
C. To provide a seal to prevent combustion gases from entering the crankcase
D. To increase the weight of the piston for better momentum
TECHNICIAN FIRST PERIOD AIT EXAM
STUDY GUIDE QUESTIONS WITH
CORRECT ANSWERS AND
EXPLANATIONS
1. When using a micrometer, what is the specific purpose of the ratchet stop or friction
thimble?
A. To lock the spindle in place once the measurement is taken
B. To speed up the adjustment process when measuring different sized parts
C. To ensure consistent pressure is applied between the spindle, anvil, and workpiece
D. To calibrate the micrometer to zero before use
Answer: C
Conceptual Explanation: The ratchet stop or friction thimble ensures that the same
amount of pressure is applied for every measurement, which is critical for accuracy and
repeatability across different users.
2. A bolt marked with three radial lines on its head belongs to which SAE grade?
A. Grade 2
B. Grade 8
,C. Grade 9
D. Grade 5
Answer: D
Conceptual Explanation: SAE Grade 5 bolts are identified by three radial lines on the
head. Grade 8 bolts have six radial lines, and Grade 2 bolts have no markings.
3. In a series electrical circuit, what happens to the total resistance if an additional load is
added?
A. The total resistance increases
B. The total resistance remains the same
C. The total resistance decreases
D. The total resistance becomes zero
Answer: A
Conceptual Explanation: In a series circuit, total resistance is the sum of all individual
resistances (Rt = R1 + R2 + …). Therefore, adding a load increases the total resistance.
4. According to Pascal’s Law, what happens to pressure applied to a confined fluid?
A. It increases as the volume of the container increases
B. It decreases as the distance from the source increases
C. It is only transmitted in the direction of the flow
, D. It is transmitted undiminished in all directions
Answer: D
Conceptual Explanation: Pascal’s Law states that pressure exerted anywhere in a
confined incompressible fluid is transmitted equally in all directions throughout the fluid.
5. Which engine component is responsible for converting the reciprocating motion of the
pistons into rotary motion?
A. The camshaft
B. The connecting rod
C. The flywheel
D. The crankshaft
Answer: D
Conceptual Explanation: The crankshaft is designed with offsets (throws) that allow it to
convert the linear (reciprocating) motion of the pistons into rotational force.
6. What is the primary function of a piston’s compression rings?
A. To scrape excess oil from the cylinder wall
B. To support the piston pin and connect to the rod
C. To provide a seal to prevent combustion gases from entering the crankcase
D. To increase the weight of the piston for better momentum
