AAI Technical Rapid Quiz-53

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Question 1

Hydrodynamic slider bearing develops load bearing capacity due to:

• ASlider velocity
• Bwedge shaped oil film
• COil compressibility
• Doil viscosity

Question 2

Axial discharge in turbine occurs when steam leaves the blade tip at an angle of:

• A45 ° with direction of blade motion
• B90 ° with direction of blade motion
• C180 °with direction of blade motion
• D120 °with direction of blade motion

Question 3

The power of a governor is the work done at

• AThe governor balls for change of speed
• BThe sleeve for zero change of speed
• CThe sleeve for a given rate of change of speed
• DEach governor ball for given percentage change of speed

Question 4

The problem of interference in involute profile gears can be overcome by which one of the following means?

• ADecreasing the centre distance
• BUsing composite profile with cycloidal curve at the root of the tooth
• CUsing stub teeth of height more than the full depth teeth
• DProper lubrication

Question 5

Components produced by die casting have finer grain, higher strength and greater hardness at the skin than at the centre due to

• Adecreased wall thickness of die cavity
• Brapid chilling of molten metal at the die walls
• Chigh temperature involved in the process
• Dhigh tonnage of die casting machines

Question 6

A bar connected with warmer body and cooler body as shown in figure. The amount of heat Q through the bar will depend on:

• Atime
• Btemperature difference
• Carea of cross-sectional of bar
• Dall of above

Question 7

Find the expression for couple moment as shown in figure?

• A
• B
• C
• D

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