# For the same inlet and outlet temperatures of hot and cold fluids, the Log Mean Temperature Difference (LMTD) is

1.  Greater for parallel flow heat exchanger than for counter flow heat exchanger.

2.  Greater for counter flow heat exchanger than for parallel flow heat exchanger.

3.   Same for both parallel and counter flow heat exchangers.

4.  Dependent on the properties of the fluids.

4

Greater for counter flow heat exchanger than for parallel flow heat exchanger.

Explanation :
No Explanation available for this question

# The following set of equations has 3x + 2y + z = 4 x- y+z = 2 -2x + 2z = 5

1.  no solution

2.  a unique solution

3.  multiple solutions

4.  none

4

a unique solution

Explanation :
No Explanation available for this question

# The function f(x,y) = 2x2 +2xy -y3 has

1.  only one stationary point at (0,0)

2.  two stationary points at (0,0) and(1/6,1/3)

3.   two stationary points at (0,0) and (1,-1)

4.  no stationary point

4

two stationary points at (0,0) and(1/6,1/3)

Explanation :
No Explanation available for this question

# Manish has to travel from A to D changing buses at stops B and C enroute. The maximum waiting time at either stop can be 8 minutes each, but any time of waiting up to 8 minutes is equally likely at both places. He can afford up to 13 minutes of total waiting time if he is to arrive at D on time. What is the probability that Manish will arrive late at D

1.  8/13

2.  13/64

3.  119/128

4.  9/128

4

8/13

Explanation :
No Explanation available for this question

# Arrivals at a telephone booth are considered to be Poisson, with an average time of 10 Minutes between successive arrivals. The length of a phone call is distributed exponentially With mean 3 minutes. The probability that an arrival does not have to wait before service is

1.  0.3

2.   0.5

3.   0.7

4.  0.9

4

0.3

Explanation :
No Explanation available for this question

# The supply at three sources is 50, 40 and 60 units respectively whilst the demand at thefour destinations is 20, 30, 10 and 50 units. In solving this transportation problem

1.  a dummy source of capacity 40 units is needed

2.  a dummy destination of capacity 40 units is needed

3.  no solution exists as the problem is infeasible

4.  none solution exists as the problem is degenerate

4

a dummy destination of capacity 40 units is needed

Explanation :
No Explanation available for this question

# A project consists of three parallel paths with mean durations and variances of (10,4), (12,4) and (12,9) respectively. According to the standard PERT assumptions, the distribution of the project duration is

1.  Beta with mean 10 and standard deviation 2

2.  Beta with mean 12 and standard deviation 2

3.  Normal with mean 10 and standard deviation 3

4.  Normal with mean 12 and standard deviation 3

4

Beta with mean 12 and standard deviation 2

Explanation :
No Explanation available for this question

# The coupling used to connect two shafts with large angular misalignment is

1.  a Flange coupling

2.   an Oldham’s coupling

3.   a Flexible bush coupling

4.  a Hooke’s joint

4

a Hooke’s joint

Explanation :
No Explanation available for this question

# A static load is mounted at the center of a shaft rotating at uniform angular velocity. This Shaft will be designed for

1.  The maximum compressive stress (static)

2.  The maximum tensile (static)

3.  The maximum bending moment (static)

4

Explanation :
No Explanation available for this question

# Large speed reductions (greater than 20) in one stage of a gear train are possible through

1.  Spur gearing

2.  Worm gearing

3.  Bevel gearing

4.  Helical gearing

4