AAI Technical Rapid Quiz-7

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Question 1

the features of the ball bearings are

• ARolling function is provided by a ball
• BLow friction, high speed, light to medium loading
• CLight and general machine applications
• DAll of these

Question 2

The structure of Fe₃C in iron carbon diagram is

• AFCC
• BBCC
• Ctetragonal
• Dorthorhombic

Question 3

The forecast data for the months of april, may, june have 30%, 30%, and 40% weightage.
What will be the forecast for the month of july ? The demand for the months is 200, 145 & 190 respectively.

• A178.33
• B179.5
• C133.75
• D59.33

Question 4

Match the relative advantages of rack angles :

• Aa-2, b-1, c-3
• Ba-1, b-3, c-2
• Ca-3, b-2, c-1
• Da-3, b-1, c-2

Question 5

Chromium in steel __________.

• AImproves wear resistance, cutting ability and toughness
• BRefines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties
• CImproves cutting ability and reduces hardenability
• DGives ductility, toughness, tensile strength

Question 6

A phenomenon is modeled using n dimensional variables with k primary dimensions. The number of non-dimensional variables is

• Ak
• Bn
• Cn-k
• Dn+k

Question 7

The psychrometric chart graphically represents:

• AInterrelation of air temperature and moisture
• BInterrelation of air pressure and moisture
• CInterrelation of volume and temperature
• DInterrelation of pressure and temperature

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