NLC Technical Quiz 22

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Question 1

The radial difference between addendum and dedendum of gear tooth is known as____.

• ABackless
• BClearance
• CFlank
• DTooth space

Question 2

The atomic packing factor for a material with body centered cubic structure is

• A0.68
• B0.53
• C0.89
• D0.87

Question 3

An engine operates between temperature limits of 900 K and and another between and 400 K. For both to be equally efficient, the value of will be

• A700 K
• B600 K
• C750 K
• D650 K

Question 4

The path of contact and the arc of contact 20 mm and 30 mm respectively in a pair of involute spur gear. The pressure angle would be

• A
• B
• C
• D

Question 5

The efficiency of a centrifugal pump is maximum when its blades are_____.

• Astraight
• Bbent forward
• Cbent backward
• Dbent forward first, and then backward

Question 6

If the section modulus of the beam decreases, then bending stress will

• Adecrease
• Bincrease
• Cremain same
• Dthere is no such co-relation

Question 7

The grinding wheel is considered better, if the grinding ratio is

• Amaximum
• Bvery low
• Caverage
• Dminimum

Question 8

Two radiating surfaces A₁ = 6 m² and A₂ = 4 m² have the shape factor F_1-2 = 0.1 Then the value of F_2-1 will be

• A0.18
• B0.15
• C0.12
• D0.10

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