Margin

Pitch

Back pitch

Diagonal pitch

B. Pitch

Similar to small size tap bolts except that a greater variety of shapes of heads are available

Slotted for a screw driver and generally used with a nut

Used to prevent relative motion between two parts

Similar to stud

Ratio of coil diameter to wire diameter

Load required to produce unit deflection

Its capability of storing energy

Concerned with strength of wire of spring

There is a thick film of lubricant between the journal and the bearing

There is a thin film of lubricant between the journal and the bearing

The lubricant is forced between the journal and the bearing, by external pressure

There is no lubricant between the journal and the bearing

120°

180°

270°

360°

_{t} /P

_{s} /P

_{c} /P

_{t}, P_{s} and P_{c}/P

F/bh

3F/2bh

2F/bh

4F/bh

1 : 1

2 : 1

3 : 2

2 : 3

Initial tension

External load applied

Sum of the initial tension and external load applied

Initial tension or external load, whichever is greater

6 m

5 m

7 m

All of these

14 ½° composite and full depth involute system

20° full depth involute system

20° stub system

None of the above

Same time to reach earth

Times proportional to weight to reach earth

Times inversely proportional to weight to reach earth

None of the above

(π/4) d² × τ × n

1.875 × (π/4) d² × τ × n

2 × (π/4) d² × τ × n

3 × (π/4) d² × τ × n

Thickness of plates to be riveted

Length of rivet

Diameter of head

Nominal diameter

Hot piercing

Extrusion

Cold peening

Cold heading

Thick lubricated bearings

Plastic bearings

Antifriction bearings

Thin lubricated bearings

External load applied

Initial tension due to tightening of the bolt

Relative elastic yielding of the bolt and the connected members

All of the above

Same

Double

One-half

One-fourth

Both sides of the actual size

One side of the actual size

One side of the nominal size

Both sides of the nominal size

Lighter and easier to handle

Greater shock absorption

Smoother inside walls

All of the above

30°

45°

60°

80°

Tensile stress

Compressive stress

Direct shear stress

Torsional shear stress

Shaft B is better than shaft A

Shaft A is better than shaft B

Both the shafts are equally good

None of these

Euler's formula

Rankine's formula

Johnson's straight line formula

Johnson's parabolic formula

Low efficiency

High efficiency

Very fine threads

Strong teeth

Effective

Smallest

Largest

None of these

Regains its original shape after deformation when the external forces are removed

Draw into wires by the application of a tensile force

Resists fracture due to high impact loads

Retain deformation produced under load permanently

Power transmitted increases

Power transmitted decreases

Power transmitted increases to a maximum value and then decreases

Power transmitted remains the same

Base circle

Pitch circle

Prime circle

Pitch curve

Which are perfectly aligned

Which are not in exact alignment

Which have lateral misalignment

Whose axes intersect at a small angle

1/2

1/3

1/4

2/3