Placement Paper of Companies

Hindustan Aeronautics Ltd Placement Question Papers

Aeronautical Engineering

1. Air Fuel ratio in a jet engine will be of the order of:

(a) 10:1 (b) 15:1
© 20:1 (d) 60:1

2. Fighter bombers use following type of engine:

(a) Turbo-jet (b) Turbo-propeller
© Rocket (d) Ram-jet

Mechanical Engineering

1. Least shrinkage allowance is provided in the case of following:

(a) Brass (b) Aluminium
© Cast Iron (d) Steel

2. 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

3. Fire tube boilers are limited to a maximum design working pressure of :

(a) 1 kg/cm2 (b) 6 kg/cm2
© 17 kg/cm2 (d ) 100 kg/cm2

Metallurgy

1. A dislocation represented by T is called:

(a) Positive edge dislocation
(b) Negative edge dislocation
© Positive screw dislocation
(d) Negative screw dislocation

2. The recrystallisation temperature of a cold worked material decreases with:

(a) Increase in the degree of deformation
(b) Increase in the initial grain size
© Increase in the temperature of cold working
(d) The presence of impurity

Electrical Engineering

1. 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
© 120 0 (d) 180 0

2. 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
© At synchronous speed in a direction opposite to that of stator field
(d) At zero speed

Electronics

1. 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
© h21 and h11 (d) None of these

2. A Signal x(t) has the Fourier transform

X(ω) = { 1 for | ω | < }W . Its first zero-crossing in time domain occurs at:

O otherwise

(a) 1/pW (b) W
( c) p/ W (d) None of these

1. 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
© Only when all the records are to be processed
(d) None of the above

2. A system in which 2 or more cpu’s are interconnnected and share a common

Main memory is called:

(a) Pipeline machine
(b) Multifunctional system
© Multiprocess
(d) None of these