Machine Assembly Round 1
AGRONA 2K15INSTRUCTIONS:ALL QUESTIONS ARE MULTIPLE CHOICE QUESTIONONCE ANSWER SELECTED IT CAN'T BE CHANGETIME DURATION:20 MINUTESDON'T CLOSE THE RESULT PAGE,IF CLOSED YOU WILL BE DISQUALIFIEDAFTER COMPLETION INFORM IMMEDIATELY TO THE CO-ORDINATORS ; &nbs p; &nb sp; &n bsp; ALL THE BEST
- 1.The bearings of heavy series have capacity __________ over the medium series.
- A.
10 to 20%
- B.
20 to 30%
- C.
30 to 40%
- D.
40 to 50%
- 2.The size of a gear is usually specified by
- A.
Pressure angle
- B.
Pitch circle diameter
- C.
Circular pitch
- D.
Diametral pitch
- 3.The backlash for spur gears depends upon
- A.
Module
- B.
Pitch line velocity
- C.
Tooth profile
- D.
Both (a) and (b)
- 4.The rolling contact bearings are known as
- A.
Thick lubricated bearings
- B.
Plastic bearings
- C.
Thin lubricated bearings
- D.
Antifriction bearings
- 5.Tapered roller bearings can take
- A.
Radial load only
- B.
Axial load only
- C.
Both radial and axial loads and the ratio of these being less than unity
- D.
Both radial and axial loads and the ratio of these being greater than unity
- 6.In order to remove internal stresses produced by hardening the steel, the process usually adopted is
- A.
Tempering
- B.
Annealing
- C.
Normalising
- D.
Spheroidising
- 7.The rivet head used for boiler plate riveting is usually
- A.
Snap head
- B.
Pan head
- C.
Counter sunk head
- D.
Conical head
- 8.A localised compressive stress at the area of contact between two members is known as
- A.
Tensile stress
- B.
Bending stress
- C.
Bearing stress
- D.
Shear stress
- 9.The metal suitable for bearings subjected to heavy loads is
- A.
Silicon bronze
- B.
White metal
- C.
Monel metal
- D.
Phosphor bronze
- 10.An universal coupling is used to connect two shafts
- A.
Which are perfectly aligned
- B.
Which are not in exact alignment
- C.
Have lateral misalignment
- D.
Whose axes intersect at a small angle\
- 11.When the shaft rotates in anticlockwise direction at slow speed in a bearing, it will
- A.
Have contact at the bottom most of the bearing
- B.
Move towards right of the bearing making the metal to metal contact
- C.
Move towards right of the bearing making no metal to metal contact
- D.
Move towards left of the bearing making metal to metal contact
- 12.A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as
- A.
Sunk key
- B.
Flat saddle key
- C.
Hollow saddle key
- D.
Tangent key
- 13.When bevel gears having equal teeth and equal pitch angles connect two shafts whose axes intersect at right angle, then they are known as
- A.
Angular bevel gears
- B.
Crown bevel gears
- C.
Internal bevel gears
- D.
Mitre gears
- 14.In case of pressure vessels having closed ends, the fluid pressure induces
- A.
Longitudinal stress
- B.
Circumferential stress
- C.
Shear stress
- D.
None of these
- 15.A machine part subjected to __________ is called a strut.
- A.
An axial tensile force
- B.
An axial compressive force
- C.
A tangential force
- D.
Any one of these
- 16.The yield point in static loading is __________ as compared to fatigue loading.
- A.
Higher
- B.
Lower
- C.
Same
- D.
Option 4
- 17.Which of the following property is desirable in parts subjected to shock and impact loads?
- A.
Strength
- B.
Stiffness
- C.
Brittleness
- D.
Toughness
- 18.Pitch point of a cam is
- A.
A point on the pitch curve having minimum pressure angle
- B.
A point on the pitch curve having maximum pressure angle
- C.
Any point on the pitch curve
- D.
Any point on the pitch circle
- 19.A screw is specified by its
- A.
Major diameter
- B.
Minor diameter
- C.
Pitch diameter
- D.
Pitch
- 20.Antifriction bearings are
- A.
Thick lubricated bearings
- B.
Plastic bearings
- C.
Thin lubricated bearings
- D.
Ball and roller bearings
- 21.A special case of ductility which permits materials to be rolled or hammered into thin sheets, is called
- A.
Plasticity
- B.
Elasticity
- C.
Ductility
- D.
Malleability
- 22.Which of the following welded joint is designed for shear strength ?
- A.
Transverse fillet welded joint
- B.
Parallel fillet welded joint
- C.
Butt welded joint
- D.
All of these
- 23.The material commonly used for crane hooks is
- A.
Cast iron
- B.
Wrought iron
- C.
Mild steel
- D.
Aluminium
- 24.In a steam engine, the valve rod is connected to an eccentric rod by means of
- A.
Cotter joint
- B.
Knuckle joint
- C.
Universal joint
- D.
Flange coupling
- 25.Which of the following formula is used in designing a connecting rod ?
- A.
Euler's formula
- B.
Rankine's formula
- C.
Johnson's straight line formula
- D.
Johnson's parabolic formula
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