Q#1: A bearing is:
(A) Machine element used to support rotating shafts and reduce friction
(B) Shaft only
(C) Gear only
(D) Spring only
Answer: (A) Machine element used to support rotating shafts and reduce friction
Q#2: Main types of bearings include:
(A) Sliding (plain) and rolling element bearings
(B) Only sliding
(C) Only rolling
(D) Mass only
Answer: (A) Sliding (plain) and rolling element bearings
Q#3: Plain bearing works by:
(A) Sliding contact between shaft and bearing surface
(B) Rolling contact
(C) Torque only
(D) Mass only
Answer: (A) Sliding contact between shaft and bearing surface
Q#4: Rolling element bearings work by:
(A) Rolling contact using balls, rollers, or needles
(B) Sliding only
(C) Torque only
(D) Mass only
Answer: (A) Rolling contact using balls, rollers, or needles
Q#5: Ball bearings are suitable for:
(A) Light to moderate loads and high speeds
(B) Heavy loads only
(C) Low speeds only
(D) Torque only
Answer: (A) Light to moderate loads and high speeds
Q#6: Roller bearings are suitable for:
(A) Heavy radial loads
(B) Light loads only
(C) Axial loads only
(D) Torque only
Answer: (A) Heavy radial loads
Q#7: Thrust bearings are designed to:
(A) Carry axial loads
(B) Radial loads only
(C) Torque only
(D) Mass only
Answer: (A) Carry axial loads
Q#8: Bearings are selected based on:
(A) Load, speed, life, lubrication, environment
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Load, speed, life, lubrication, environment
Q#9: Lubrication in bearings is required to:
(A) Reduce friction and wear, dissipate heat
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Reduce friction and wear, dissipate heat
Q#10: Bearing life is usually expressed in:
(A) Number of revolutions or hours of operation at given load
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Number of revolutions or hours of operation at given load
Q#11: The load carrying capacity of a bearing is influenced by:
(A) Material, size, type, and lubrication
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Material, size, type, and lubrication
Q#12: Anti-friction bearings include:
(A) Ball, roller, needle, and tapered bearings
(B) Only ball bearings
(C) Only roller bearings
(D) Mass only
Answer: (A) Ball, roller, needle, and tapered bearings
Q#13: Plain bearings are often made of:
(A) Bronze, babbitt, cast iron, or polymers
(B) Steel only
(C) Aluminum only
(D) Mass only
Answer: (A) Bronze, babbitt, cast iron, or polymers
Q#14: Rolling bearings reduce friction because:
(A) Rolling resistance is lower than sliding resistance
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Rolling resistance is lower than sliding resistance
Q#15: Tapered roller bearings are used for:
(A) Combined radial and thrust loads
(B) Radial load only
(C) Axial load only
(D) Mass only
Answer: (A) Combined radial and thrust loads
Q#16: Bearings fail mainly due to:
(A) Fatigue, wear, lubrication failure, misalignment
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Fatigue, wear, lubrication failure, misalignment
Q#17: Bearing clearance is:
(A) Small space between rolling element and raceway
(B) Shaft diameter only
(C) Torque only
(D) Mass only
Answer: (A) Small space between rolling element and raceway
Q#18: Preloading a bearing:
(A) Removes internal clearance to increase rigidity
(B) Increases wear only
(C) Mass only
(D) Torque only
Answer: (A) Removes internal clearance to increase rigidity
Q#19: Bearings require maintenance to:
(A) Ensure lubrication, check alignment, and prevent overheating
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Ensure lubrication, check alignment, and prevent overheating
Q#20: Material for high-speed bearings is selected for:
(A) Hardness, wear resistance, fatigue strength, and thermal stability
(B) Mass only
(C) Torque only
(D) Energy only
Answer: (A) Hardness, wear resistance, fatigue strength, and thermal stability