310T Practice Exam #2 (100 Q&A) | A+
Score Practice Questions with Answers &
Rationales
SECTION 1: COMMON OCCUPATIONAL SKILLS (Questions 1-8)
Question 1
What procedure should be followed before using a bench grinder?
A) Dress stone and set rest with minimum clearance of 3 mm (1/8″)
B) Dress stone and set rest with minimum clearance of 6 mm (1/4″)
C) Dress stone and set rest with minimum clearance of 1 mm (1/32″)
D) No dressing is required before use
Answer: A) Dress stone and set rest with minimum clearance of 3 mm (1/8″)
Rationale: Before using a bench grinder, the wheel should be dressed and the tool
rest should be set with a minimum clearance of 3 mm (1/8″) to prevent workpieces
from jamming between the wheel and the rest.
Question 2
What should be inspected on a chain sling before the technician uses it?
A) Color and paint condition
B) Stretching, nicks, gouges, and wear
C) Length only
D) Manufacturer's name only
Answer: B) Stretching, nicks, gouges, and wear
Rationale: Chain slings must be inspected for stretching, nicks, gouges, and wear
before use to ensure they are safe for lifting operations.
,Question 3
Under WHMIS 2015, a Safety Data Sheet (SDS) is divided into how many
standardized sections?
A) 8
B) 12
C) 16
D) 20
Answer: C) 16
Rationale: Under WHMIS 2015 (aligned with GHS), every Safety Data Sheet
follows a standardized 16-section format covering identification, hazards,
composition, first aid, handling, and more.
Question 4
When using a sling to lift a heavy component, the rated working load of the sling
decreases as the angle between the sling legs and the horizontal becomes:
A) A smaller angle, closer to horizontal
B) Larger (closer to vertical)
C) Exactly 90 degrees
D) Unaffected by angle
Answer: A) A smaller angle, closer to horizontal
Rationale: As the sling angle to the horizontal decreases, the tension in each leg
increases sharply, reducing the safe working load.
Question 5
What is the most important step a technician must take before working under a
heavy truck raised on a hoist?
A) Apply the parking brakes only
B) Engage mechanical locks or use rated safety stands
C) Chock one rear wheel
D) Leave the transmission in gear
Answer: B) Engage mechanical locks or use rated safety stands
,Rationale: A hydraulic or air hoist can settle or fail, so its mechanical safety locks
must be engaged (or rated safety stands positioned) before anyone works
underneath.
Question 6
Which of the following tools can be used to cut new external threads?
A) A die
B) A thread pitch gauge
C) A tap
D) A thread chaser
Answer: A) A die
Rationale: A die is the correct tool for cutting new external threads. A tap is used
for internal threads, a thread pitch gauge measures thread pitch, and a thread chaser
is used to clean existing threads.
Question 7
Oxy-acetylene cylinders must be stored:
A) Lying flat on the floor
B) Upright and secured with a chain
C) Stacked on top of each other
D) In any position as long as valves are closed
Answer: B) Upright and secured with a chain
Rationale: Oxy-acetylene cylinders must be stored upright and secured with a
chain to prevent them from falling and causing injury or damage.
Question 8
Which tool is used with a rigid base to measure brake-rotor or hub runout?
A) A carbon-pile load tester
B) A click-type torque wrench
C) A dial indicator
D) A tire tread-depth gauge
, Answer: C) A dial indicator
Rationale: A dial indicator mounted on a rigid base measures small axial or radial
movement while rotating a brake rotor or hub to check runout.
SECTION 2: ENGINES AND SUPPORTING SYSTEMS (Questions 9-29)
Question 9
What would be indicated by engine oil contaminated with coolant?
A) Worn piston rings
B) A failed cylinder head gasket
C) A clogged oil filter
D) Worn main bearings
Answer: B) A failed cylinder head gasket
Rationale: Coolant in the engine oil typically indicates a failed cylinder head
gasket, allowing coolant to leak into the oil galleries or crankcase.
Question 10
Which test is most commonly used to detect cracks in a cylinder head before re-
assembly?
A) Ultrasonic thickness gauge
B) Magnetic particle inspection
C) Pressure leak-down test
D) Dye penetrant inspection
Answer: B) Magnetic particle inspection
Rationale: Magnetic particle inspection is commonly used to detect surface and
near-surface cracks in ferrous metal cylinder heads before reassembly.
Question 11
What tool should be used to measure the air filter restriction?
A) A water manometer
B) A vacuum gauge
Score Practice Questions with Answers &
Rationales
SECTION 1: COMMON OCCUPATIONAL SKILLS (Questions 1-8)
Question 1
What procedure should be followed before using a bench grinder?
A) Dress stone and set rest with minimum clearance of 3 mm (1/8″)
B) Dress stone and set rest with minimum clearance of 6 mm (1/4″)
C) Dress stone and set rest with minimum clearance of 1 mm (1/32″)
D) No dressing is required before use
Answer: A) Dress stone and set rest with minimum clearance of 3 mm (1/8″)
Rationale: Before using a bench grinder, the wheel should be dressed and the tool
rest should be set with a minimum clearance of 3 mm (1/8″) to prevent workpieces
from jamming between the wheel and the rest.
Question 2
What should be inspected on a chain sling before the technician uses it?
A) Color and paint condition
B) Stretching, nicks, gouges, and wear
C) Length only
D) Manufacturer's name only
Answer: B) Stretching, nicks, gouges, and wear
Rationale: Chain slings must be inspected for stretching, nicks, gouges, and wear
before use to ensure they are safe for lifting operations.
,Question 3
Under WHMIS 2015, a Safety Data Sheet (SDS) is divided into how many
standardized sections?
A) 8
B) 12
C) 16
D) 20
Answer: C) 16
Rationale: Under WHMIS 2015 (aligned with GHS), every Safety Data Sheet
follows a standardized 16-section format covering identification, hazards,
composition, first aid, handling, and more.
Question 4
When using a sling to lift a heavy component, the rated working load of the sling
decreases as the angle between the sling legs and the horizontal becomes:
A) A smaller angle, closer to horizontal
B) Larger (closer to vertical)
C) Exactly 90 degrees
D) Unaffected by angle
Answer: A) A smaller angle, closer to horizontal
Rationale: As the sling angle to the horizontal decreases, the tension in each leg
increases sharply, reducing the safe working load.
Question 5
What is the most important step a technician must take before working under a
heavy truck raised on a hoist?
A) Apply the parking brakes only
B) Engage mechanical locks or use rated safety stands
C) Chock one rear wheel
D) Leave the transmission in gear
Answer: B) Engage mechanical locks or use rated safety stands
,Rationale: A hydraulic or air hoist can settle or fail, so its mechanical safety locks
must be engaged (or rated safety stands positioned) before anyone works
underneath.
Question 6
Which of the following tools can be used to cut new external threads?
A) A die
B) A thread pitch gauge
C) A tap
D) A thread chaser
Answer: A) A die
Rationale: A die is the correct tool for cutting new external threads. A tap is used
for internal threads, a thread pitch gauge measures thread pitch, and a thread chaser
is used to clean existing threads.
Question 7
Oxy-acetylene cylinders must be stored:
A) Lying flat on the floor
B) Upright and secured with a chain
C) Stacked on top of each other
D) In any position as long as valves are closed
Answer: B) Upright and secured with a chain
Rationale: Oxy-acetylene cylinders must be stored upright and secured with a
chain to prevent them from falling and causing injury or damage.
Question 8
Which tool is used with a rigid base to measure brake-rotor or hub runout?
A) A carbon-pile load tester
B) A click-type torque wrench
C) A dial indicator
D) A tire tread-depth gauge
, Answer: C) A dial indicator
Rationale: A dial indicator mounted on a rigid base measures small axial or radial
movement while rotating a brake rotor or hub to check runout.
SECTION 2: ENGINES AND SUPPORTING SYSTEMS (Questions 9-29)
Question 9
What would be indicated by engine oil contaminated with coolant?
A) Worn piston rings
B) A failed cylinder head gasket
C) A clogged oil filter
D) Worn main bearings
Answer: B) A failed cylinder head gasket
Rationale: Coolant in the engine oil typically indicates a failed cylinder head
gasket, allowing coolant to leak into the oil galleries or crankcase.
Question 10
Which test is most commonly used to detect cracks in a cylinder head before re-
assembly?
A) Ultrasonic thickness gauge
B) Magnetic particle inspection
C) Pressure leak-down test
D) Dye penetrant inspection
Answer: B) Magnetic particle inspection
Rationale: Magnetic particle inspection is commonly used to detect surface and
near-surface cracks in ferrous metal cylinder heads before reassembly.
Question 11
What tool should be used to measure the air filter restriction?
A) A water manometer
B) A vacuum gauge
