141 questions
21
Mixed
Moderate
PYQ
+1.0
-0.33
Which of the following machines converts electrical energy into mechanical energy?
22
Mixed
Moderate
PYQ
+1.0
-0.33
In an electric vehicle. a speedometer displays the speed of the vehicle, whereas a/an displays the speed of the motor.
23
Mixed
Moderate
PYQ
+1.0
-0.33
Synchronous motors are:
24
Mixed
Moderate
PYQ
+1.0
-0.33
The speed of an induction motor falls slightly with the increase of:
25
Mixed
Moderate
PYQ
+1.0
-0.33
The recommended configuration for soldering is:
26
Mixed
Moderate
PYQ
+1.0
-0.33
Among the following, which metal is NOT usually preferred as flux for soldering applications?
27
Mixed
Moderate
PYQ
+1.0
-0.33
The conductor used in electrical wiring should be of______________________
28
Mixed
Moderate
PYQ
+1.0
-0.33
In which of the following transformers, secondary winding is always kept closed?
29
Mixed
Moderate
PYQ
+1.0
-0.33
An alkaline cell is discharged at a steady current of 4A for 12 hours. To restore it to its original state of charge, a steady current of 3A for 20 hours is required. Calculate Ah efficiency.
30
Mixed
Moderate
PYQ
+1.0
-0.33
The positive plates of nickel iron cell are made up of: