R-7 Limited Conveyor Contractor Exam:
Verified Questions and Answers | Instant PDF
Study Guide
1.What is the primary purpose of a conveyor take-up assembly?
A. To increase motor horsepower
B. To reduce belt width
C. To maintain proper belt tension
D. To eliminate all belt tracking adjustments
Rationale: A take-up assembly maintains the appropriate
tension in a conveyor belt as the belt stretches, contracts, or
changes length due to operating conditions. Proper tension
helps prevent slipping, tracking problems, and inadequate
power transmission.
2. Which component is primarily responsible for supporting
the conveyor belt between the head and tail pulleys?
A. Drive motor
B. Idlers
C. Take-up screw
D. Gear reducer
Rationale: Idlers support the carrying and return portions of a
conveyor belt. They reduce belt sag and help maintain the belt's
proper shape while the conveyor is operating.
, 3. What is the main function of a conveyor head pulley?
A. Store electrical energy
B. Adjust belt width
C. Drive or discharge material from the belt
D. Lubricate the belt
Rationale: The head pulley is commonly located at the discharge
end of a belt conveyor. It may be driven by the motor and
provides the point where material leaves the belt.
4. Before performing maintenance on a conveyor, what
should generally be done first?
A. Increase belt speed
B. Remove all guards while energized
C. Shut down and properly isolate the equipment from
hazardous energy
D. Spray the belt with lubricant
Rationale: Conveyor maintenance can expose workers to moving
parts, electrical energy, stored mechanical energy, and gravity
hazards. Proper shutdown, lockout/tagout, and verification of
zero energy are essential before work begins.
5. What is the primary purpose of a conveyor belt scraper?
A. Increase belt tension
B. Remove material remaining on the belt surface
,C. Increase motor speed
D. Reduce pulley diameter
Rationale: Belt scrapers, also called belt cleaners, remove
carryback material from the belt after discharge. Effective
cleaning reduces material buildup and helps prevent
contamination and tracking problems.
6. Which conveyor component normally changes the
direction of the belt at the return end?
A. Snub pulley
B. Drive coupling
C. Tail pulley
D. Troughing idler
Rationale: The tail pulley is generally located at the opposite
end from the head pulley. It redirects the belt from the carrying
run to the return run and may also work with the take-up
system.
7. What is the primary purpose of a conveyor emergency-
stop device?
A. Increase production
B. Start the conveyor automatically
C. Stop conveyor operation during an emergency
D. Adjust belt tension
, Rationale: Emergency-stop devices are intended to provide a
rapid means of stopping hazardous conveyor motion. They are
safety devices and should be readily accessible to personnel who
may need to respond to an emergency.
8. Why are conveyor guards installed around moving
components?
A. To improve belt color
B. To increase material capacity
C. To prevent personnel contact with hazardous moving parts
D. To reduce electrical voltage
Rationale: Guards protect workers from rotating shafts, pulleys,
chains, couplings, and other moving components. A properly
installed guard prevents accidental access to dangerous points
of operation.
9. What is belt tracking?
A. Measuring belt thickness
B. Maintaining the belt in its intended path on the conveyor
C. Increasing belt speed
D. Determining motor voltage
Rationale: Belt tracking refers to keeping the conveyor belt
centered and properly aligned as it travels. Poor tracking can
cause edge damage, spillage, premature wear, and structural
damage.
Verified Questions and Answers | Instant PDF
Study Guide
1.What is the primary purpose of a conveyor take-up assembly?
A. To increase motor horsepower
B. To reduce belt width
C. To maintain proper belt tension
D. To eliminate all belt tracking adjustments
Rationale: A take-up assembly maintains the appropriate
tension in a conveyor belt as the belt stretches, contracts, or
changes length due to operating conditions. Proper tension
helps prevent slipping, tracking problems, and inadequate
power transmission.
2. Which component is primarily responsible for supporting
the conveyor belt between the head and tail pulleys?
A. Drive motor
B. Idlers
C. Take-up screw
D. Gear reducer
Rationale: Idlers support the carrying and return portions of a
conveyor belt. They reduce belt sag and help maintain the belt's
proper shape while the conveyor is operating.
, 3. What is the main function of a conveyor head pulley?
A. Store electrical energy
B. Adjust belt width
C. Drive or discharge material from the belt
D. Lubricate the belt
Rationale: The head pulley is commonly located at the discharge
end of a belt conveyor. It may be driven by the motor and
provides the point where material leaves the belt.
4. Before performing maintenance on a conveyor, what
should generally be done first?
A. Increase belt speed
B. Remove all guards while energized
C. Shut down and properly isolate the equipment from
hazardous energy
D. Spray the belt with lubricant
Rationale: Conveyor maintenance can expose workers to moving
parts, electrical energy, stored mechanical energy, and gravity
hazards. Proper shutdown, lockout/tagout, and verification of
zero energy are essential before work begins.
5. What is the primary purpose of a conveyor belt scraper?
A. Increase belt tension
B. Remove material remaining on the belt surface
,C. Increase motor speed
D. Reduce pulley diameter
Rationale: Belt scrapers, also called belt cleaners, remove
carryback material from the belt after discharge. Effective
cleaning reduces material buildup and helps prevent
contamination and tracking problems.
6. Which conveyor component normally changes the
direction of the belt at the return end?
A. Snub pulley
B. Drive coupling
C. Tail pulley
D. Troughing idler
Rationale: The tail pulley is generally located at the opposite
end from the head pulley. It redirects the belt from the carrying
run to the return run and may also work with the take-up
system.
7. What is the primary purpose of a conveyor emergency-
stop device?
A. Increase production
B. Start the conveyor automatically
C. Stop conveyor operation during an emergency
D. Adjust belt tension
, Rationale: Emergency-stop devices are intended to provide a
rapid means of stopping hazardous conveyor motion. They are
safety devices and should be readily accessible to personnel who
may need to respond to an emergency.
8. Why are conveyor guards installed around moving
components?
A. To improve belt color
B. To increase material capacity
C. To prevent personnel contact with hazardous moving parts
D. To reduce electrical voltage
Rationale: Guards protect workers from rotating shafts, pulleys,
chains, couplings, and other moving components. A properly
installed guard prevents accidental access to dangerous points
of operation.
9. What is belt tracking?
A. Measuring belt thickness
B. Maintaining the belt in its intended path on the conveyor
C. Increasing belt speed
D. Determining motor voltage
Rationale: Belt tracking refers to keeping the conveyor belt
centered and properly aligned as it travels. Poor tracking can
cause edge damage, spillage, premature wear, and structural
damage.
