# 5 skilled workers can build a wall in 20days; 8 semi-skilled workers can build a wall in 25 days; 10 unskilled workers can build a wall in 30days. If a team has 2 skilled, 6 semi-skilled and 5 unskilled workers, how long will it take to build the wall

1.  20

2.  18

3.  16

4.  15

4

15

Explanation :
No Explanation available for this question

# .Modern warfare has changed from large scale clashes of armies to suppression of civilian populations. Chemical agents that do their work silently appear to be suited  to  such  warfare;  and   regretfully,  there  exist  people  in  military establishments who think that chemical agents are useful tools for their cause. Which of the following statements best sums up the meaning of the above passage:

1.  Modern warfare has resulted in civil strife

2.  Chemical agents are useful in modern warfare

3.  Use of chemical agents in warfare would be undesirable

4.  People in military establishments like to use chemical agents in war

4

Use of chemical agents in warfare would be undesirable

Explanation :
No Explanation available for this question

# Given digits 2,2,3,3,4,4,4,4 how many distinct 4 digit numbers greater than 3000 can be formed

1.  50

2.  51

3.  52

4.  54

4

51

Explanation :
No Explanation available for this question

# If 137+276=435 how much is 731+672

1.  534

2.   1403

3.  1623

4.  1513

4

1623

Explanation :
No Explanation available for this question

# Roots of the algebraic equation x3 + x2 + x + 1 = 0 are

1.  (+1, +j,-j)

2.  (+1,-1, +1)

3.  (0, 0, 0)

4.  (-1, +j,-j)

4

(-1, +j,-j)

Explanation :
No Explanation available for this question

# With K as a constant,the possible solution for the first order differential equation dy/dx=e-3x is

1.  -(1/3)e-3x + K

2.  -(1/3)e3x + K

3.  - (1/3)e-3x + K

4.  -3e-x + K

4

-(1/3)e-3x + K

Explanation :
No Explanation available for this question

# The r.m.s value of the current i(t) in the circuit shown below is

1.  ½ A

2.  (1/√2)A

3.  1A

4.  √2 A

4

(1/√2)A

Explanation :
No Explanation available for this question

# The fourier series expansion of the periodic signal shown below will contain the following nonzero terms

1.  a0 and bn, n = 1,3,5,...∞

2.  a0 and an, n = 1,2,3,...∞

3.  a0 an and bn, n = 1,2,3,...∞

4.  a0 and an n = 1,3,5,...

4

a0 and an n = 1,3,5,...

Explanation :
No Explanation available for this question

# A 4-point starter is used to start and control the speed of a

1.  dc shunt motor with armature resistance control

2.  dc shunt motor with field weakening control

3.  dc series motor

4.  dc compound motor

4

dc shunt motor with armature resistance control

Explanation :
No Explanation available for this question

# A three-phase,salient pole synchronous motor is connected to an infinite bus.Ig is operated at no load a normal excitation.the field excitation of the motor is first reduced to zero and then increased in reverse direction gradually.Then the armature current

1.  Increases continuously

2.  First increases and then decreases steeply

3.  First decreases and then increases steeply

4.  Remains constant

4