Key Answers of COMEDK

I am having paper of COMEDK UGET 2015 exam. will you please give here answer key of Mathematics section of COMEDK UGET 2015?

[Arun Vats]

As you want I am here giving you sample question paper of Hal Management Trainee exam with answer key.

Sample questions:
As you want I am here giving you sample question paper of Hal Management Trainee exam with answer key.

1.Find the wrong number in the sequence 1,2,6,15,31,56,91
(a) 15
(b) 6
(c) 56
(d) 91
Ans : (d) 91

2.Find the next number in the sequence 1,2,4,7,11,___
(a) 15
(b) 18
(c) 16
(d) 12
Ans : (c) 16

3.When a product is sold at certain price, it gives 20% gain. What is the gain when it is sold at thrice the price ?
(a) 250
(b) 260
(c) 270
(d) 280
Ans : (b) 260

4.The average weight of two groups consisting of 70 and 30 members are 70 and 30 respectively. What is the total average weight ?
(a) 61
(b) 58
(c) 49
(d) 52
Ans : (b) 58

5.A man complete a journey in 10 hours. He travels first half of the journey at the rate of 21 km/hr and second half at the rate of 24 km/hr. Find the total journey in km.
(a) 220 km
(b) 224 km
(c) 230 km
(d) 234 km
Ans : (b) 224 km

6.A man is facing south. He turns 90o in the clockwise direction and then 135o in the same direction. Which direction is he facing now?
(a) North-East
(b) North-West
(c) South-East
(d) South-West
Ans : (a) North-East

7.The sum of two digit number and its reverse number is 99. How many such numbers are possible ?
(a) 9
(b) 10
(c) 16
(d) 100
Ans : (b) 10

8.A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. If the area of the lawn is 2109 sq. m, then what is the width of the road?
(a) 3 m
(b) 2.91 m
(c) 5.82 m
(d) None of these
Ans : (a) 3 m

9.Two pipes A and B can fill a cistern in 37 1/2 minutes and 45 minutes respectively. Both pipes are opened. The cistern will be filled in just half an hour, if the B is turned off after:
(a) 5 min
(b) 10 min
(c) 9 min
(d) 15 min
Ans : (c) 9 min

1. Air Fuel ratio in a jet engine will be of the order of:
(a) 10:1 (b) 15:1
(c) 20:1 (d) 60:1
2. Fighter bombers use following type of engine:
(a) Turbo-jet (b) Turbo-propeller
(c) Rocket (d) Ram-jet
3. Least shrinkage allowance is provided in the case of following:
(a) Brass (b) Aluminum
(c) Cast Iron (d) Steel
4. If V is the volume of metal in a casting and A its surface area, the time of solidification will
be proportional to:
(a) V, 1/A (b) V,1/A2
(c ) V2 ,1/A (d) V2, 1/A2
5. Fire tube boilers are limited to a maximum design working pressure of :
(a) 1 kg/cm2 (b) 6 kg/cm2
(C) 17 kg/cm2 (d ) 100 kg/cm2
6. A dislocation represented by T is called:
(a) Positive edge dislocation
(b) Negative edge dislocation
(c) Positive screw dislocation
(d) Negative screw dislocation
7. The recrystallisation temperature of a cold worked material decreases with:
(a) Increase in the degree of deformation
(b) Increase in the initial grain size
(c) Increase in the temperature of cold working
(d) The presence of impurity
8. In a thyrister full converter feeding a continuous load current, what is the duration each
thyrister conducts in a cycle?
(a) 60 0 (b) 90 0
(c) 120 0 (d) 180 0
9. In a three-phase induction motor, the rotor field runs at the following speed with Respect to the
stator structure:
(a) At synchronous speed in the direction of stator field
(b) At a slip speed in the direction of stator speed
(c) At synchronous speed in a direction opposite to that of stator field
(d) At zero speed
10. In the hybrid parameter model of a transistor reverse transfer voltage ratio and forward
transfer
current ratio are respectively given by:
(a) h11 and h21 (b) h12 and h11
(c) h21 and h11 (d) None of these
11. A Signal x(t) has the Fourier transform
X( ) = { 1 for | | < }W . Its first zero-crossing in time domain occurs at:
O otherwise
(a) 1/pW (b) W
( c) p/ W (d) None of these
12. Magnetic tapes are suitable to applications:
(a) When only a few records are to be accessed
(b) When most of the records are to be accessed
(c) Only when all the records are to be processed
(d) None of the above
13. A system in which 2 or more cpu's are interconnected and share a common
Main memory is called:
(a) Pipeline machine
(b) Multifunctional system
(c) Multiprocess
(d) None of these
Which one of the following is the most stable configuration of an airplane in roll?
(A) Sweep back, anhedral and low wing
(B) Sweep forward, dihedral and low wing
(C) Sweep forward, anhedral and high wing
(D) Sweep back, dihedral and high wing
Which one of the following flight instruments is used on an aircraft to determine its attitude in
flight?
(A) Vertical speed indicator
(B) Altimeter
(C) Artificial Horizon
(D) Turn-bank indicator
A supersonic airplane is expected to fly at both subsonic and supersonic speeds during its whole light course. Which one of the following statements is TRUE?
(A) Airplane will experience less stability in pitch at supersonic speeds than at subsonic speeds
(B) Airplane will feel no change in pitch stability
(C) Airplane will experience more stability in pitch at supersonic speeds than at subsonic speeds
(D) Pitch stability cannot be inferred from the information given
Which one of the following is favorable for an airplane operation?
(A) Tail wind in cruise and head wind in landing
(B) Tail wind both in cruise and landing
(C) Head wind both in cruise and landing
(D) Head wind in cruise and tail wind in landing
Which one of the following is TRUE with respect to Phugoid mode of an aircraft?
(A) Frequency is directly proportional to flight speed
(B) Frequency is inversely proportional to flight speed
(C) Frequency is directly proportional to the square root of flight speed
(D) Frequency is inversely proportional to the square root of flight speed
Which one of the following statements is NOT TRUE for a supersonic flow?
(A) Over a gradual expansion, entropy remains constant
(B) Over a sharp expansion corner, entropy can increase
(C) Over a gradual compression, entropy can remain constant
(D) Over a sharp compression corner, entropy increases
The cross-section of a long thin-walled member is as shown in the figure. When subjected to pure
twist, point A
(A) does not move horizontally or axially, but moves vertically
(B) does not move axially, but moves both vertically and horizontally
(C) does not move horizontally, vertically or axially
(D) does not move vertically or axially, but moves horizontally