Machine Design - Section 1 (6)

Directions to Solve

Machine Design - Section 1

41.

The application of third type levers is found in

A.	handle of a hand pump
B.	hand wheel of a punching press
C.	lever of a loaded safety valve
D.	a pair of tongs

Answer: Option D

Explanation:

No answer description available for this question.

42.

A screw is said to be over hauling screw, if its efficiency is

A.	less than 50%
B.	more than 50%
C.	equal to 50%
D.	none of these

Answer: Option B

Explanation:

No answer description available for this question.

43.

The toughness of a material __________ when it is heated.

A.	increases
B.	decreases
C.	does not change

Answer: Option B

Explanation:

No answer description available for this question.

44.

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

A.	angular bevel gears
B.	crown bevel gears
C.	internal bevel gears
D.	mitre gears

Answer: Option B

Explanation:

No answer description available for this question.

45.

The number of rivets in shear shall be equal to the number of rivets in crushing.

A.	Correct
B.	Incorrect

Answer: Option A

Explanation:

No answer description available for this question.

46.

Screws used for power transmission should have

A.	Low efficiency
B.	high efficiency
C.	very fine threads
D.	strong teeth

Answer: Option B

Explanation:

No answer description available for this question.

47.

A sliding bearing in which the working surfaces are completely separated from each other by lubricant is called zero film bearing.

A.	True
B.	False

Answer: Option B

Explanation:

No answer description available for this question.

48.

The sleeve or muff coupling is designed as a

A.	dun cylinder
B.	thick cylinder
C.	solid shaft
D.	hollow shaft

Answer: Option D

Explanation:

No answer description available for this question.

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