Mechanical Engineering Design Objective Questions with Answers - Set 09

Practice Test: Question Set - 09

1. The function of cutting oil when threading a pipe is to
    (A) Provide cooling action
    (B) Lubricate the dies
    (C) Help removes chips
    (D) All of the above

2. Which of the following statement is wrong?
    (A) The V-belt may be operated in either direction with tight side of the belt at the top or bottom
    (B) The V-belt drive is used with large center distance
    (C) The power transmitted by V-belts is less than flat belts for the same coefficient of friction, arc of contact and allowable tension in the belts
    (D) The ratio of driving tensions in V-belt drive is more than flat belt drives

3. Tapered roller bearings can take
    (A) Axial load only
    (B) Both radial and axial loads and the ratio of these being greater than unity
    (C) Radial load only
    (D) Both radial and axial loads and the ratio of these being less than unity

4. Silver based solder is used for
    (A) Flaring
    (B) Brazing
    (C) Soft soldering
    (D) Fusion welding

5. For tight leakage joints, following type of thread is best suited
    (A) Metric
    (B) Buttress
    (C) Square
    (D) NPT (national pipe threads).

6. In a hydrodynamic lubricated bearing
    (A) There is a thick film of lubricant between the journal and the bearing
    (B) There is a thin film of lubricant between the journal and the bearing
    (C) The lubricant is forced between the journal and the bearing, by external pressure
    (D) There is no lubricant between the journal and the bearing

7. The power transmitted by belt drive depends upon
    (A) Belt velocity
    (B) Initial belt tension 
    (C) Arc of contact
    (D) All of the above

8. In order to permit the thermal expansion/contraction of tubing, it should be
    (A) Crimped
    (B) Honed
    (C) Flared
    (D) Bent

9. A tube has the following advantage over pipe
    (A) Lighter and easier to handle
    (B) Greater shock absorption
    (C) Smoother inside walls
    (D) All of the above

10. The strap end of a connecting rod of steam engine is joined by
    (A) Gib of cotter joint
    (B) Sleeve and cotter joint
    (C) Spigot socket cotter joint
    (D) Knuckle joint

11. When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the
    (A) Thread
    (B) Middle
    (C) Shank
    (D) Head

12. The application of third type levers is found in
    (A) A pair of tongs
    (B) Hand wheel of a punching press
    (C) Lever of a loaded safety valve
    (D) Handle of a hand pump

13. A backing ring is used inside the pipe joint when making a
    (A) Butt weld
    (B) Fillet weld
    (C) Sleeve weld
    (D) Socket weld

14. The suitable material for belt in agricultural machinery is
    (A) Leather
    (B) Rubber 
    (C) Cotton duck
    (D) Balata gum

15. The shear plane in case of bolts should
    (A) Be across threaded portion of shank
    (B) Be parallel to axis of bolt
    (C) Be normal to threaded portion of shank
    (D) Never be across the threaded portion

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