ALP CBT-2 Previous Year Question 2019-01-22 Morning Shift Electrician

Unsolicited electronic messages sent for marketing purposes are called_________________

The efficiency of a machine can never be_______________

In practice, the work output of a machine is_________________ the work input due to the effect of friction.

An effort of 5 units is applied on a 10-unit load. The distance travelled by the effort and the load are 50 and 20 units, respectively. Find the efficiency of this machine.

The force applied to overcome a load is called____________________

An object starts from rest at x =0 mand t = 0 s. It moves with a constant acceleration of 2 m/s? along the x-axis. What is its average velocity between time 1 s and 5 s?

A 100-g block of lead is heated from 20°C to 50°C. Calculate the amount of heat transferred to the block (specific heat of lead = 127 I'kg 1K 1)

A brick wall having a thickness of 24 cm has an inner surface temperature of 25°C and an outer surface temperature of 5°C. The rate of heat loss through per square metre of the wall (thermal conductivity = 0.15 J/ (s'm'K) ) is:

Two resistors, one of 20 © and the other of 30 Q. are connected in parallel. This combination is connected in series with an 8-Q resistor and a 12-V battery. The current through the 20-Q resistor is:

A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but half its length and half its radius will be: