ALBERTA HEAVY EQUIPMENT
TECHNICIAN FIRST PERIOD AIT
PRACTICE EXAM QUESTIONS AND
ANSWERS 2026/2027
1. Which type of fire extinguisher is most appropriate for a fire involving flammable liquids
such as diesel fuel or hydraulic oil?
A. Class A
B. Class K
C. Class D
D. Class B
Answer: D
Conceptual Explanation: Class B extinguishers are designed for flammable liquids. Class A
is for ordinary combustibles, Class D for combustible metals, and Class K for cooking fats.
2. When using a micrometer, what is the purpose of the ratchet stop or friction thimble?
A. To lock the spindle in place for reading
B. To provide a uniform measurement pressure
,C. To adjust the zero calibration
D. To increase the measuring range
Answer: B
Conceptual Explanation: The ratchet stop ensures that the same amount of pressure is
applied to the workpiece every time, ensuring consistent and accurate readings.
3. A Grade 8 SAE bolt can be identified by which head marking?
A. Three radial lines
B. The number 8.8
C. Six radial lines
D. The number 10.9
Answer: C
Conceptual Explanation: SAE Grade 8 bolts are marked with six radial lines. Three lines
indicate Grade 5. Numbers like 8.8 or 10.9 are Metric grade markings.
4. Which law states that pressure exerted anywhere in a confined incompressible fluid is
transmitted equally in all directions?
A. Pascal’s Law
B. Boyle’s Law
C. Ohm’s Law
, D. Charles’s Law
Answer: A
Conceptual Explanation: Pascal’s Law is the fundamental principle behind hydraulic
systems, stating pressure is transmitted equally throughout a confined fluid.
5. What is the primary function of the compression rings on a diesel engine piston?
A. To scrape oil off the cylinder wall
B. To provide a bearing surface for the piston
C. To seal the combustion chamber and transfer heat
D. To balance the weight of the piston assembly
Answer: C
Conceptual Explanation: Compression rings seal the gases in the combustion chamber to
prevent blow-by and are the primary path for heat transfer from the piston to the cylinder
wall.
6. In a 12V parallel circuit with two 4-ohm resistors, what is the total resistance?
A. 8 ohms
B. 4 ohms
C. 0.5 ohms
D. 2 ohms
TECHNICIAN FIRST PERIOD AIT
PRACTICE EXAM QUESTIONS AND
ANSWERS 2026/2027
1. Which type of fire extinguisher is most appropriate for a fire involving flammable liquids
such as diesel fuel or hydraulic oil?
A. Class A
B. Class K
C. Class D
D. Class B
Answer: D
Conceptual Explanation: Class B extinguishers are designed for flammable liquids. Class A
is for ordinary combustibles, Class D for combustible metals, and Class K for cooking fats.
2. When using a micrometer, what is the purpose of the ratchet stop or friction thimble?
A. To lock the spindle in place for reading
B. To provide a uniform measurement pressure
,C. To adjust the zero calibration
D. To increase the measuring range
Answer: B
Conceptual Explanation: The ratchet stop ensures that the same amount of pressure is
applied to the workpiece every time, ensuring consistent and accurate readings.
3. A Grade 8 SAE bolt can be identified by which head marking?
A. Three radial lines
B. The number 8.8
C. Six radial lines
D. The number 10.9
Answer: C
Conceptual Explanation: SAE Grade 8 bolts are marked with six radial lines. Three lines
indicate Grade 5. Numbers like 8.8 or 10.9 are Metric grade markings.
4. Which law states that pressure exerted anywhere in a confined incompressible fluid is
transmitted equally in all directions?
A. Pascal’s Law
B. Boyle’s Law
C. Ohm’s Law
, D. Charles’s Law
Answer: A
Conceptual Explanation: Pascal’s Law is the fundamental principle behind hydraulic
systems, stating pressure is transmitted equally throughout a confined fluid.
5. What is the primary function of the compression rings on a diesel engine piston?
A. To scrape oil off the cylinder wall
B. To provide a bearing surface for the piston
C. To seal the combustion chamber and transfer heat
D. To balance the weight of the piston assembly
Answer: C
Conceptual Explanation: Compression rings seal the gases in the combustion chamber to
prevent blow-by and are the primary path for heat transfer from the piston to the cylinder
wall.
6. In a 12V parallel circuit with two 4-ohm resistors, what is the total resistance?
A. 8 ohms
B. 4 ohms
C. 0.5 ohms
D. 2 ohms
