# Manufacturing and Industrial Engineering [GATE (Graduate Aptitude Test in Engineering) Mechanical Engineering]: Questions 73 - 76 of 115

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## Question 73

Manufacturing and Industrial Engineering
Physics of Welding

Appeared in Year: 2015

### Question

MCQ▾

In a linear arc welding process, the heat input per unit length is inversely proportional to

### Choices

Choice (4)Response

a.

welding current

b.

duty cycle of the power source

c.

welding speed

d.

welding voltage

## Question 74

Manufacturing and Industrial Engineering
Forecasting Models
Edit

Appeared in Year: 2015

### Question

For a canteen, the actual demand for disposable cups was 500 units in January and 600 units in February. The forecast for the month of January was 400 units. The forecast for the month of March considering smoothing coefficient as 0.75 is

## Question 75

Manufacturing and Industrial Engineering
Mechanics of Machining

Appeared in Year: 2015

### Question

In a slab rolling operation, the maximum thickness reduction is given by , where is the radius of the roll and is the coefficient of friction between the roll and the sheet. If , the maximum angle subtended by the deformation zone at the center of the roll (bite angle in degrees) is

## Question 76

Manufacturing and Industrial Engineering
Solidification and Cooling

Appeared in Year: 2015

### Question

MCQ▾

The solidification time of a casting is proportional to , where V is the volume of the casting and A is the total casting surface area losing heat. Two cubes of same material and size are cast using sand casting process. The top face of one of the cubes is completely insulated. The ratio of the solidification time for the cube with top face insulated to that of the other cube is

### Choices

Choice (4)Response

a.

b.

c.

d.

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