Mechanical Maintenance Questions

Question 1

What is the main function of a coupling in a machine?
a) Transmit torque between two shafts
b) Reduce vibration
c) Align pulleys
d) Secure bearings

Answer 1

a) Transmit torque between two shafts

Question 2

Which tool is used to check the flatness of a surface?
a) Dial indicator
b) Feeler gauge
c) Straight edge
d) Torque wrench

Answer 2

c) Straight edge

Question 3

What is the purpose of a key in a shaft-key assembly?
a) To provide axial movement
b) To secure components to the shaft
c) To align the shaft
d) To prevent belt slippage

Answer 3

b) To secure components to the shaft

Question 4

What is the primary purpose of lubrication in a mechanical system?
a) Increase heat generation
b) Reduce friction and wear
c) Secure fasteners
d) Align components

Answer 4

b) Reduce friction and wear

Question 5

Which type of bearing is best suited for radial loads?
a) Ball bearing
b) Thrust bearing
c) Roller bearing
d) Sleeve bearing

Answer 5

c) Roller bearing

Question 6

What is the function of a torque wrench?
a) Measure the tension in a belt
b) Tighten bolts to a specific torque
c) Check the flatness of a surface
d) Measure electrical current

Answer 6

b) Tighten bolts to a specific torque

Question 7

Which component reduces friction between moving parts in a machine?
a) Bearing
b) Gear
c) Pulley
d) Coupling

Answer 7

a) Bearing

Question 8

What is the purpose of a V-belt in a pulley system?
a) To increase friction between the pulley and the belt
b) To transfer rotational motion and power
c) To prevent slippage under load
d) Both b and c

Answer 8

d) Both b and c

Question 9

What is the best method to align two shafts in a machine?
a) Visual inspection
b) Feeler gauge
c) Laser alignment tool
d) Straight edge

Answer 9

c) Laser alignment tool

Question 10

What type of tool is used to remove a press-fitted bearing?
a) Bearing puller
b) Hammer
c) Wrench
d) Screwdriver

Answer 10

a) Bearing puller

Question 11

When installing a conveyor belt, what is the first step?
a) Tensioning the belt
b) Aligning the pulleys
c) Turning off the power to the system
d) Measuring the length of the belt

Answer 11

c) Turning off the power to the system

Question 12

What is the correct way to tension a conveyor belt?
a) Tighten until the belt no longer moves
b) Follow the manufacturer’s specifications
c) Leave it slightly loose
d) Over-tighten to ensure no slippage

Answer 12

b) Follow the manufacturer’s specifications

Question 13

What is the primary purpose of tracking a conveyor belt? a) Ensure the belt runs in the center of the system
b) Increase belt speed
c) Reduce friction
d) Align the motor with the pulleys

Answer 13

a) Ensure the belt runs in the center of the system

Question 14

Which tool is commonly used to splice a conveyor belt?
a) Belt cutter
b) Clamping press
c) Screwdriver
d) Welding torch

Answer 14

b) Clamping press

Question 15

How often should conveyor belts be inspected for wear and tear?
a) Monthly
b) Weekly
c) Daily
d) According to the manufacturer’s recommendations

Answer 15

d) According to the manufacturer’s recommendations

Question 16

What is the best method to align two shafts in a machine?
a) Visual inspection
b) Feeler gauge
c) Laser alignment tool
d) Straight edge

Answer 16

d) Straight edge

Question 17

What type of tool is used to remove a press-fitted bearing?
a) Bearing puller
b) Hammer
c) Wrench
d) Screwdriver

Answer 17

a) Bearing puller

Question 18

What is the main function of a gearbox in a mechanical system?
a) Convert rotational speed and torque
b) Align shafts
c) Reduce friction
d) Store mechanical energy

Answer 18

a) Convert rotational speed and torque

Question 19

What is the primary purpose of a mechanical seal in a pump?
a) Prevent fluid leakage
b) Increase pump speed
c) Align pump components
d) Reduce vibration

Answer 19

a) Prevent fluid leakage

Question 20

Which tool is commonly used to measure shaft runout?
a) Dial indicator
b) Torque wrench
c) Feeler gauge
d) Vernier caliper

Answer 20

a) Dial indicator

Question 21

What is the purpose of a keyway in a shaft?
a) Increase friction
b) Prevent rotation between a shaft and a component
c) Provide lubrication
d) Reduce weight

Answer 21

b) Prevent rotation between a shaft and a component

Question 22

What is a flywheel’s primary function in a mechanical system?
a) Reduce friction
b) Store rotational energy
c) Align moving parts
d) Provide lubrication

Answer 22

b) Store rotational energy

Question 23

What is the first step in troubleshooting an electrical motor that won’t start?
a) Replace the motor
b) Check the power supply
c) Inspect the bearings
d) Test the insulation resistance

Answer 23

b) Check the power supply

Question 24

What is the purpose of a preventive maintenance schedule?
a) Maximize equipment downtime
b) Reduce unexpected equipment failures
c) Increase operational costs
d) Eliminate the need for spare parts

Answer 24

Answer: b) Reduce unexpected equipment failures

Question 25

Which tool is commonly used to detect bearing wear?
a) Stethoscope
b) Infrared thermometer
c) Vibration analyzer
d) Torque wrench

Answer 25

c) Vibration analyzer

Question 26

What is the most likely cause of overheating in an electric motor?
a) Low supply voltage
b) Overloading
c) Loose connections
d) Misaligned bearings

Answer 26

b) Overloading

Question 27

What should be done if a machine vibrates excessively during operation?
a) Increase operating speed
b) Inspect for misalignment or imbalance
c) Reduce lubricant levels
d) Replace the motor

Answer 27

b) Inspect for misalignment or imbalance