Spring index is___________________?

A. Ratio of coil diameter to wire diameter
B. Load required to produce unit deflection
C. Its capability of storing energy
D. Indication of quality of spring

Form coefficient of spring is _____________________?

A. Ratio of coil diameter to wire diameter
B. Load required to produce unit deflection
C. Its capability of storing energy
D. Concerned with strength of wire of spring

When two springs are in series (having stiffness K), the equivalent stiffness will be________________?

A. K
B. K/2
C. 2k
D. Kia

If a spring is cut down into two springs, the stiffness of cut springs will be _________________?

A. Half
B. Same
C. Double
D. Unpredictable

Aircraft body is usually fabricated by_________________?

A. Welding
B. Precasting
C. Rivetting
D. Casting

In hydrodynamic bearings_____________________?

A. The oil film pressure is generated only by the rotation of the journal
B. The oil film is maintained by supplying oil under pressure
C. Do not require external supply of lubricant
D. Grease is used for lubrication

If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by________________?

A. Zn/p
B. P/zn
C. Z/pn
D. N/zp

In hydrostatic bearings ____________________?

A. The oil film pressure is generated only by the rotation of the journal
B. The oil film is maintained by supplying oil under pressure
C. Do not require external supply of lubricant
D. Grease is used for lubrication

The rated life of a bearing varies___________________?

A. Directly as load
B. Inversely as square of load
C. Inversely as cube of load
D. Inversely as fourth power of load

In V-belt drive, belt touches______________?

A. At bottom
B. At sides only
C. Both at bottom and sides
D. Could touch anywhere