In an N type semiconductor material, the majority carriers are

Which of the following helps in the operation of the choke coil?

It is not desirable to run induction motor at light load because

In Kerala commercially generating voltage(by KSEB ) is

From the following select the motor which is not self starting

Kayamkulam electric power station is

Through which the ac circuit elements both the emf and current are in phase

Cage induction motor can be started using

The current in the armature of d.c motor is the maximum when the motor is

The a.c. cannot be used for

The varying magnetic field produces electric voltage in a conductor. This is known as

Which of the following is independent of the frequency of a.c ?

The transformer varies the output of

Four wires of equal length and of resistance 5 ohms each are connected in the form of a square. The equivalent resistance between two opposite corners of the square is

Ohm's law is valid when the temperature of the conductor is

The statement that the algebraic sum of currents meeting at a node is zero, is given by the law

A sprue is

In sand moulding the bottom flask is called

For the same tension and coefficient of friction, the type of belt which can transmit more power is

The possibility of negative slip in reciprocating pump is when

The specific speed of a pump is defined as the speed of the pump which is working against a unit head

The vertical distance between the centre line of the pump and water surface in the tank to which water is transferred is known as

The refrigerant in a refrigeration system will be at its highest temperature

In an Otto cycle the heat addition is assumed to be at:

In a polytropic process, the ratio of work to heat transfer is

For the same expansion ratio, work done by a gas in case of adiabatic process as compared to isothermal process is

The change in entropy is zero during

A device which works on Zeroth law of thermodynamics is

A thermodynamic cycle is irreversible and possible if

Work done in a free expansion process is

The required slope correction for a chain line of length 60 m measured along a slope of 1 in 20 is

The rise and fall system of calculating reduced levels of ground points in levelling work provides an arithmetical check on

If, As' is the area calculated by Simpson's rule and, A' that calculated by trapezoidal rule, then

An obstacle which obstructs both chaining and vision is

Compacting factor test is carried out on concrete to determine

The instrument used to determine the areas of plots with curved boundaries is

At the magnetic poles, the amount of dip is

The fundamental principle of surveying is to work from

In a well conditioned triangle, no angle should be less than

Moment of inertia of a semi-circular area of radius r about its base is

If a body is in equilibrium under the action of 2 forces, then the forces must be

A rigid body suspended at the top and vibrating with a small amplitude under the action of the force of gravity is known as:

The unit mass-moment of inertia of a body is

The maximum acceleration of a body moving in SHM with angular velocity ,'ω' and amplitude "r" is

For perfectly elastic bodies the value of coefficient of restitution is

The resultant of two forces P and Q (P>Q) dating along the same straight line but in the opposite direction is given by

The total time taken for collision and restitution of two elastic bodies is called

The mass moment of inertia of a solid sphere of radius 'r' about any axis passing through its centre of mass 'M' is

The maximum frictional force which comes into play when a body just begins to slide over the surface of another body is known as

The length of a seconds pendulum is: