Question 1: The function of bearing is to
| A.Support load. |
| B. Transmit power. |
| C. Convert rotary to reciprocating motion. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 2: On the basis of direction of load bearing can be classified as
| A. Radial, thrust, conical. |
| B. Radial, conical, hydrodynamic. |
| C. Aerodynamic, hydrodynamic, dry. |
| D. Rolling, sliding, linear. |
(A)
(B)
(C)
(D)
Question 3: Which of the following is/are the cause of bearing failure?
| A. Sudden rise in bearing load.
|
| B. Inappropriate bearing selection. |
| C. Improper mounting of bearing. |
| D. All of above. |
(A)
(B)
(C)
(D)
Question 4: Which of the following is NOT a component of ball bearing?
| A. Inner ring. |
| B. Outer ring. |
| C. Balls and cage. |
| D. Bush. |
(A)
(B)
(C)
(D)
Question 5: The rolling element that can be used in a bearing is/are:
| A. Balls. |
| B. Needle rollers. |
| C. Rollers. |
| D. All of above. |
(A)
(B)
(C)
(D)
Question 6: In a radial rolling element bearing, on increasing the size of the rolling elements would
| A. Increase load capacity of the radial bearing. |
| B. Decrease load bearing capacity. |
| C. Increase or decrease depending on the constraint on outer diameter of outer ring. |
| D. Increase or decrease depending on the constraint on bore diameter of inner ring. |
(A)
(B)
(C)
(D)
Question 7: Which of the following statements are true about the seals used in bearings?
| A. Seals are made of elastic rubber. |
| B. Seals provide very good grease retainability. |
| C. A seal does not allow dust to enter. |
| D. All of above. |
(A)
(B)
(C)
(D)
Question 8: Rolling bearings having contact angle lesser than 450 are referred as:
| A. Radial bearings. |
| B. Axial bearings. |
| C. Thrust bearings. |
| D. Contact angle has nothing to do with axial and radial load bearing capacity. |
(A)
(B)
(C)
(D)
Question 9: Lundberg palmgren approach is used to estimate:
| A. Thrust load rating of bearings. |
| B. Static load rating of bearings. |
| C. Wear rate of rolling elements. |
| D. Life of rolling element bearings. |
(A)
(B)
(C)
(D)
Question 10: In general which one of the following bearings has the highest coefficient of friction?
| A. Self-aligning ball bearing. |
| B. Cylindrical ball bearing. |
| C. Thrust ball bearing. |
| D. Needle bearing. |
(A)
(B)
(C)
(D)
Question 11: Coefficient of friction is higher for needle bearing because
| A. Greater length of rollers and low manufacturing accuracy. |
| B. Rollers cannot be guided well. |
| C. Rubbing action against rollers. |
| D. All of above. |
(A)
(B)
(C)
(D)
Question 12: Friction in rolling bearings occurs due to:
| A. Loading and unloading of rolling elements on rings. |
| B. Deformation of rolling elements. |
| C. Lubricant shearing inside the bearing. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 13: What is/are the sources of friction inside the bearing?
| A. Friction due to load. |
| B. Friction due to sliding. |
| C. Friction due to churning action of the load. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 14: On what factors the load capacity of a bearing depends?
| A. Operational speed of the bearing and contact angle. |
| B. Lubricant behaviour. |
| C. Material properties of rings and rolling elements. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 15: What is meant by the preloading of the bearings?
| A. Extra load apart from the rated load capacity. |
| B. Initial load on the bearings before the start of the operations. |
| C. Negative clearance between rolling elements and bearing rings. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 16: Bearing misalignment is:
| A. Deformation of rolling elements. |
| B. Wear of rolling elements. |
| C. Angle greater than 0.50 between axes of inner and outer rings. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 17: Which of the following is NOT a common value of pressure angle used in gears?
| A. 14.50. |
| B. 200. |
| C. 20.50. |
| D. 250. |
(A)
(B)
(C)
(D)
Question 18: Which one is the advantage of helical gear over spur gear?
| A. Silent operation. |
| B. Power transmission between non parallel shafts. |
| C. Decreased tooth loading. |
| D. All of above. |
(A)
(B)
(C)
(D)
Question 19: How is herringbone gear better than the helical gear?
| A. Side thrust on one half is balanced by the other half. |
| B. Use of substantial thrust bearing can be avoided. |
| C. Both (a) & (b). |
| D. Herringbone gears easier to manufacture compare to helical gears. |
(A)
(B)
(C)
(D)
Question 20: Commonly used mechanisms for gear lubrication are:
| A. Splash lubrication. |
| B. Pressurized lubrication by oil jets. |
| C. Both (a) & (b). |
| D. Hydrodynamic pressure. |
(A)
(B)
(C)
(D)
Question 21: Required material properties for the design of journal bearing are:
| A. Durable. |
| B. Low friction. |
| C. Low wear. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 22: With respect to journal bearing, increasing bearing length would
| A. Increase load bearing capacity. |
| B. Decrease load bearing capacity. |
| C. First increases and then decreases load bearing capacity. |
| D. First decreases and then increases load bearing capacity. |
(A)
(B)
(C)
(D)
Question 23: What are very important factors for design of hydrodynamic bearing for given shaft diameter?
| A. Bearing clearance, length. |
| B. Bearing length, bore diameter. |
| C. Both (a) & (b). |
| D. Bearing thickness. |
(A)
(B)
(C)
(D)
Question 24: How many rolling elements are present inside a hydrodynamic bearing?
| A. 10 |
| B. 12. |
| C. 15. |
| D. None of these. |
(A)
(B)
(C)
(D)
Question 25: In what operating conditions grease is used to lubricate a journal bearing?
| A. Temperature involved is low. |
| B. Low operating speed. |
| C. Both (a) & (b). |
| D. None of these. |
(A)
(B)
(C)
(D)
Question 26: The purpose of self-aligning bearing is to
| A. toleratea small amount of misalignment between the axes of shaft and bearing. |
| B. Toleratea small amount of wear in the rolling elements for continuous operation. |
| C. Tolerate the plastic deformation in rolling elements and cage. |
| D. Tolerate a small amount of temperature variation. |
(A)
(B)
(C)
(D)
Question 27: Static load capacity of radial rolling bearings is defined as
| A. The load acting on the bearing when the rolling elements are not experiencing any load. |
| B. The load acting on the bearing when there is no plastic deformation on the rolling elements. |
| C. The load acting on the bearing when the shaft is stationary. |
| D. The load that produces a total permanent deformation of rolling element and raceway, which is approximately 0.01% of the rolling element diameter. |
(A)
(B)
(C)
(D)
Question 28: The two commonly used grades of porous bearings are:
| A. Copper base. |
| B. Iron base. |
| C. Both (a) & (b). |
| D. None of the above. |
(A)
(B)
(C)
(D)
Question 29: The life of the bearing is estimated in
| A. Number of revolutions at some constant speed. |
| B. Numbers of hours of service at some constant speed. |
| C. Both (a) & (b). |
| D. None of these. |
(A)
(B)
(C)
(D)
Question 30: In taper roller bearings the inner and outer rings are known as
| A. Cone and cup respectively. |
| B. Cup and cone respectively. |
| C. Cone 1 and Cone 2 respectively. |
| D. Cup 1 and Cup 2 respectively. |
(A)
(B)
(C)
(D)
Question 31: Weibull distribution represents the relationship between
| A. Bearing life and reliability. |
| B. Bearing life and load bearing capacity. |
| C. Static and dynamics load capacities of the bearings. |
| D. Number of rolling elements and load capacity. |
(A)
(B)
(C)
(D)
Question 32: Which one of the following is NOT the function of bearing?
| A. Ensure free rotation of the shaft with minimum friction. |
| B. Support the shaft and hold it in correct position. |
| C. Take up forces that act on shaft and transmit them to the frame or foundation. |
| D. Reduce centrifugal force of the shaft. |
(A)
(B)
(C)
(D)
Question 33: Which one of the following is an example of antifriction bearing?
| A. Journal bearing. |
| B. Plain bearing. |
| C. Thrust rolling bearing. |
| D. Sleeve bearing. |
(A)
(B)
(C)
(D)
Question 34: Disadvantage(s) of cylindrical bearing is/are:
| A. Cylindrical roller bearing is more rigid than ball bearing. |
| B. Cylindrical roller bearing generates more noise. |
| C. Cylindrical roller bearing is not self-aligning. |
| D. Both (b) & (c). |
(A)
(B)
(C)
(D)
Question 35: Unique advantage(s) of deep groove ball bearing is/are:
| A. High load carry capacity due to relatively large size of the balls. |
| B. Ability to take load in radial and axial direction. |
| C. Performance in high speed applications due to less frictional loss. |
| D. All of the above. |
(A)
(B)
(C)
(D)
Question 36: Which one of the following bearing is most appropriate for household applications where noise is an important consideration?
| A. Deep groove ball bearing. |
| B. Self-aligning ball bearings. |
| C. Roller bearings. |
| D. Needle roller bearing. |
(A)
(B)
(C)
(D)
Question 37: Babbitt is called a white metal because of:
| A. Its whitish appearance. |
| B. Its silvery appearance. |
| C. Its highly reflective surface. |
| D. Its tin content. |
(A)
(B)
(C)
(D)
Question 38: The factors that constitute energy loss in hydrostatic bearing are:
| A. Energy lost to pump the lubricating oil. |
| B. Energy lost due to viscous friction. |
| C. Both (a) & (b). |
| D. None of these. |
(A)
(B)
(C)
(D)
Question 39: Which of the following is true about full journal bearing?
| A. The angle of contact of bushing with the journal is 3600. |
| B. The angle of contact of bushing with the journal is less than 1800. |
| C. Full journal bearing can take load in any axial direction. |
| D. Full journal bearing can take load in any radial direction. |
(A)
(B)
(C)
(D)
Question 40: With reference to journal bearing, clearance bearing is one in which
| A. Radius of the journal is more than the radius of the bearing. |
| B. Radius of the journal is lesser than the radius of the bearing. |
| C. Length of the journal is more than the radius of the bearing. |
| D. Length of the journal is lesser than the radius of the bearing. |
(A)
(B)
(C)
(D)
Question 41: Popular bearing material Babbitt is an alloy of:
| A. Tin, aluminium, copper, and antimony. |
| B. Tin, lead, copper, and antimony. |
| C. Manganese, lead, copper, and antimony. |
| D. Molybdenum, lead, copper, and antimony. |
(A)
(B)
(C)
(D)
Question 42: Which of the following non-metals can be used as bearing materials?
| A. Graphite. |
| B. Plastics(Teflon). |
| C. Rubber. |
| D. All of above. |
(A)
(B)
(C)
(D)
Question 43: Velocity ratio or speed ratio with respect to gears is the ratio between:
| A. Angular velocity of the driving gear to the angular velocity of the driven gear. |
| B. Angular velocity of the driven gear to the angular velocity of the driving gear. |
| C. Tangential velocity of the driving gear to the tangential velocity of the driven gear. |
| D. Tangential velocity of the drivengear to the tangential velocity of the drivinggear. |
(A)
(B)
(C)
(D)
Question 44: Worm gear is used to transmit power between:
| A. Two non-intersecting shafts generally at right angles to each other. |
| B. Inclined shafts generally at acute angle to each other. |
| C. Parallel shafts which are at close distance to each other. |
| D. Parallel shafts which are at significant distance from each other. |
(A)
(B)
(C)
(D)
Question 45: For heavy radial loads and large shaft diameters which is the most appropriate bearing from the following bearing types?
| A. Ball bearing. |
| B. Roller bearing. |
| C. Self-aligning bearing. |
| D. Needle roller bearing. |
(A)
(B)
(C)
(D)
Question 46: Which of the following represents the correct sequence of bearing selection from manufacturer’s catalogue?
STEP 1: Calculations of radial and axial forces and determining the diameter of the shaft where the bearing is to be fitted.
STEP 2: Determining the type of bearing for the given application.
STEP 3: Determining the values of radial and thrust factors from the catalogue.
STEP 4: Calculation of equivalent dynamic load and estimating bearing life in million revolutions.
STEP 5: Calculation of dynamic load capacity and verifying the dynamic load capacity of the bearing.
| A. STEP 1, STEP 2, STEP 3, STEP 5, STEP 4. |
| B. STEP 1, STEP 3, STEP 2, STEP 4, STEP 5. |
| C. STEP 1, STEP 2, STEP 3, STEP 4, STEP 5. |
| D. STEP 2, STEP 1, STEP 3, STEP 5, STEP 4. |
(A)
(B)
(C)
(D)
Question 47: The two basic patterns of oil grooves used in bearings are:
| A. Circumferential groove. |
| B. Axial groove. |
| C. Both (a) and (b). |
| D. Symmetrical groove. |
(A)
(B)
(C)
(D)
Check Score