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Machine Design
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Question
The number of slots in a 25 mm castle nut is
Options
A. 2
B. 4
C. 6
D. 8
Correct Answer
6
Tags:
Bank Exams
Machine Design problems
Search Results
1. A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.
Options
A. True
B. False
Show Answer
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Correct Answer: False
2. When bevel gears connect two shafts whose axes intersect at an angle greater than a right angle and one of the bevel gears has a pitch angle of 90°, then they are known as
Options
A. angular bevel gears
B. crown bevel gears
C. internal bevel gears
D. mitre gears
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Correct Answer: crown bevel gears
3. For maximum power, the velocity of the belt will be
Options
A.
B.
C.
D. none of these
Show Answer
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Discuss
Correct Answer:
4. The number of rivets in shear shall be equal to the number of rivets in crushing.
Options
A. Correct
B. Incorrect
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Correct Answer: Correct
5. A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called
Options
A. castle nut
B. jam nut
C. ring nut
D. sawn nut
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Correct Answer: ring nut
6. Crystal structure of a material is, generally, examined by
Options
A. naked eye
B. optical microscope
C. metallurgical microscope
D. X-ray techniques
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Correct Answer: X-ray techniques
7. The coke in the charge of blast furnace
Options
A. controls the grade of pig iron
B. acts as an iron-bearing mineral
C. supplies heat to reduce ore and melt the iron
D. forms a slag by combining with impurities
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Correct Answer: supplies heat to reduce ore and melt the iron
8. The quenching of steel from the upper critical point results in a fine grained structure.
Options
A. Agree
B. Disagree
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Correct Answer: Agree
9. Closed packed hexagonal space lattice is found in
Options
A. zinc, magnesium, cobalt, cadmium, antimony and bismuth
B. gamma-iron, aluminium, copper, lead, silver and nickel
C. alpha-iron, tungsten, chromium and molybdenum
D. none of the above
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Correct Answer: zinc, magnesium, cobalt, cadmium, antimony and bismuth
10. Tungsten when added to steel __________ the critical temperature.
Options
A. does not effect
B. lowers
C. raises
Show Answer
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Correct Answer: raises
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