# What is approximate percentage change is the life, t, of a tool with zero rake angle used in orthogonal cutting when its clearance angle, α, is changed from 10° to 7° (Hint: Flank wear rate is proportional to cot a)

1.  30% increase

2.  30% decrease

3.  70% increase

4.  70% decrease

4

30\% decrease

Explanation :
No Explanation available for this question

# In computing Wilson's economic lot size for a n item, by mistake the demand rate estimate used was 40% higher than the tree demand rate. Due to this error in the lot size computation, the total cost of setups plus inventory holding per unit time, would rise above the true optimum by approximately

1.  1.4%

2.  6.3%

3.  18.3%

4.  8.7°%

4

18.3\%

Explanation :
No Explanation available for this question

# At a production ma chine, parts arrive according to a Poisson process at the rate of 0.35 parts per minute. Processing time for parts have exponential distribution with mea n of 2 minutes. What is the probability that a random part arrival finds that there are already 8 parts in the system (in ma chine + in queue)

1.  0.0247

2.  0.082

3.  0.0173

4.  0.0576

4

0.0173

Explanation :
No Explanation available for this question

# Suppose X is a normal random variable with mean 0 and variance 4. Then the mea n of the absolute value of X is

1.  1/√2π

2.  2√2/√π

3.  2√2/ π

4.  2/√π

4

2√2/√π

Explanation :
No Explanation available for this question

# If Z=f(x, y), dz is equal to

1.

2.

3.

4.

4 Explanation :
No Explanation available for this question

1.  ∞

2.  0

3.  2

4.  1

4

2

Explanation :
No Explanation available for this question

# Availability of a system at any given state is

1.  a property of the system

2.  the maximum work obtainable as the system goes to dead state

3.  the total energy of the system

4.   the maximum useful work obtainable as the system goes to dead state

4

the maximum useful work obtainable as the system goes to dead state

Explanation :
No Explanation available for this question

1.  Aex + Bex

2.  ex(Ax +B)

3.  e -x {A cos(√3/2)x+ B cos (√3/2)x}

4.  e –x/2  {A cos(√3/2)x+ B cos (√3/2)x}

4

e –x/2  {A cos(√3/2)x+ B cos (√3/2)x}

Explanation :
No Explanation available for this question

1.  1, 2, 3

2.  1, 2, 2

3.  1, 0, 0

4.  0, 2, 3

4

1, 2, 2

Explanation :
No Explanation available for this question

1.   0 kJ

2.  50 kJ

3.  150 kJ

4.  250 kJ

4