Machine Design MCQ Questions & Answers

21

A pressure vessel is said to be a thick shell, if the ratio of wall thickness to its diameter is

A) Equal to $$\frac{1}{{10}}$$ B) Less than $$\frac{1}{{10}}$$ C) Greater than $$\frac{1}{{10}}$$ D) None of these

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Answer & Solution

Answer: Option C

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22

The pitch of threads on a Jock nut in comparison to pitch of nut is

A) Same B) Coarser C) Finer D) Very fine

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Answer & Solution

Answer: Option A

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23

In hydrodynamic bearings

A) The oil film pressure is generated only by the rotation of the journal B) The oil film is maintained by supplying oil under pressure C) Do not require external supply of lubricant D) Grease is used for lubrication

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Answer & Solution

Answer: Option A

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24

The function of a washer is to

A) Provide cushioning effect B) Provide bearing area C) Absorb shocks and vibrations D) Provide smooth surface in place of rough surface

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Answer & Solution

Answer: Option B

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25

The load cup of a screw jack is made separate from the head of the spindle to

A) Prevent the rotation of load being lifted B) Enhance the load carrying capacity of the jack C) Reduce the effort needed for lifting the working load D) Reduce the value of frictional torque

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Answer & Solution

Answer: Option A

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26

Silver based solder is used for

A) Flaring B) Brazing C) Soft soldering D) Fusion welding

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Answer & Solution

Answer: Option B

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27

The endurance limit for a mirror polished material will be __________ as compared to unpolished material.

A) Same B) Less C) More D) None of these

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Answer & Solution

Answer: Option C

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28

Eye bolts are used for

A) Foundation purposes B) Absorbing shock and vibrations C) Transmission of power D) Lifting and transportation of machines and cubicles

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Answer & Solution

Answer: Option D

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29

When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

A) $$\frac{1}{2}\sqrt {{{\text{M}}^2} + {{\text{T}}^2}} $$ B) $$\sqrt {{{\text{M}}^2} + {{\text{T}}^2}} $$ C) $$\frac{1}{2}\left( {{\text{M}} + \sqrt {{{\text{M}}^2} + {{\text{T}}^2}} } \right)$$ D) $${\text{M}} + \sqrt {{{\text{M}}^2} + {{\text{T}}^2}} $$

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Answer & Solution

Answer: Option B

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30

A transmission shaft includes

A) Over head shaft B) Counter shaft C) Line shaft D) All of these

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Answer & Solution

Answer: Option D

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Machine Design MCQ Questions & Answers | Mechanical Engineering