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# Machine Design Online Exam Quiz

Important questions about Machine Design. Machine Design MCQ questions with answers. Machine Design exam questions and answers for students and interviews.

Options

A : Correct

B : Incorrect

C :

D :

### 2. The pipe joint mostly used for pipes carrying water at low pressures is

Options

A : socket joint

B : nipple joint

C : union joint

D : spigot and socket joint

Options

A : 40

B : 50

C : 70

D : 100

### 4. The resistance to fatigue of a material is measured by

Options

A : elastic limit

B : Young's modulus

C : ultimate tensile strength

D : endurance limit

### 5. The value of stress concentration factor depends upon

Options

A : material of the part

B : geometry of the part

C : material and geometry of the part

D : none of these

### 6. For unequal width of butt straps, the thickness of butt straps are

Options

A : 0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside

B : 0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside

C : 0.75 t for both the straps on the inside and outside

D : 0.625 t for both the straps on the inside and outside

### 7. According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

Options

A : d 2 x ? x n

B : 1.875 x d 2 x ? x n

C : 2 x d 2 x ? x n

D : 3 x d 2 x ? x n

### 8. Which of the following statement is correct for gears?

Options

A : The addendum is less than dedendum

B : The pitch circle diameter is equal to the product of module and number of teeth

C : The pitch circle is always greater than the base circle

D : all of the above

### 9. Slenderness ratio is the ratio of

Options

A : maximum size of column to minimum size of column

B : width of column to depth of column

C : effective length of column to least radius of gyration of the column

D : effective length of column to width of column

### 10. Screws used for power transmission should have

Options

A : Low efficiency

B : high efficiency

D : strong teeth

### 1. An open belt drive is used when

Options

A : shafts are arranged parallel and rotate in the opposite directions

B : shafts are arranged parallel and rotate in the same directions

C : shafts are arranged at right angles and rotate in one definite direction

D : driven shaft is to be started or stopped whenever desired without interferring with the driving shaft

### 2. A transmission shaft includes

Options

A : counter shaft

B : line shaft

D : all of these

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

Options

A : True

B : False

C :

D :

### 6. Surface endurance limit of gear material is dependent upon its

Options

A : elastic strength

B : yield strength

C : brinell hardness number

D : toughness

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

Options

A : enhance the load carrying capacity of the jack

B : reduce the effort needed for lifting the working load

C : prevent the rotation of load being lifted

D : reduce the value of frictional torque

Options

A : transmission

B : machine

C :

D :

### 10. The ball bearings are provided with a cage

Options

A : to reduce friction

B : to facilitate slipping of balls

C : to prevent the lubricant from flowing out

D : to maintain the balls at a fixed distance apart

### 2. The toughness of a material __________ when it is heated.

Options

A : increases

B : decreases

C : does not change

D :