Questions on Electrical Engineering

11-Out of the following, which one has almost no change in resistance for change in temperature:
(A) Nickel
(B) Nichrome
(C) Manganin
(D) Platinum
12-Fleming’s Right hand rule is used to identify the:
(A) Direction of current in a motor
(B) Direction of rotation in a generator
(C) Direction of rotation in a motor
(D) Direction of induced emf
13-Resistances of 5 ohms, 5 kilo ohms, 50 kilo ohms and 5 mega ohms are connected in parallel. Their equivalent resistance will be very near to:
(A) 4.5 ohms
(B) 4.5 kilo ohms
(C) 45 kilo ohms
(D) 4.5 mega ohms
14-A substance that has low retentivity can be used for the manufacture of:
(A) Electromagnets
(B) Permanent magnets
(C) Bar magnets
(D) Paramagnets
15-“Eyre No. 7” is:
(A) Copper soldering flux
(B) Aluminium solder
(C) Copper solder
(D) Aluminium soldering flux
16-The shunt type ohmmeter will have zero reading at the:
(A) Centre of the scale
(B) Right hand end of the scale
(C) Left hand end of the scale
(D) Anywhere according to manufacturer
17-Crackle test on transformer oil is conducted to find out the presence of:
(A) Air
(B) Water
(C) Gas
(D) Oxide
18-A thermistor is a device whose resistance:
(A) Reduces as temperature increases
(B) Increases as temperature increases
(C) Reduces as temperature reduces
(D) Remains constant at all temperatures
19-Metric Horse Power is equal to:
(A) 736 W
(B) 746 W
(C) 756 W
(D) 1000 W
20-A very low value of insulation resistance indicates:
(A) Good operating condition
(B) Fair operating condition
(C) An immediate investigation
(D) That the measuring instrument is wrong
ANSWERS:
11-(C), 12-(D), 13-(A), 14-(D), 15-(D), 16-(C), 17-(B), 18-(A), 19-(A), 20-(C)