⚡Electrical Engineering MCQs
Electrical Engineering MCQs
499 MCQs151
The travelling speed of cranes varies from_________________?
A20 to 30 m/s
B10 to 15 m/s
C5 to 10 m/s
D1 to 2.5 m/s
152
The cost of an induction motor will increase as________________?
Ahorsepower rating increases but r.p.m. decreases
Bhorsepower rating decreases but r.p.m. increases
Chorsepower rating and operating speed increases
Dhorsepower rating and operating speed decreases
153
While selecting motor for an air conditioner which of the following characteristics is of great importance ?
AType of bearings
BType of enclosure
CNoise
DArrangement for power transmis¬sion E. None of the above
154
Which of the following alternatives will be cheaper ?
AA 100 H.P. AC. three phase motor
BFour motors of 25 H.P. each
CFive motors of 20 H.P. each
DTen motors of 10 H.P. each
155
Which of the following motors has series characteristics ?
AShaded pole motor
BRepulsion motor
CCapacitor start motor
DNone of the above
156
For a D.C. shunt motor which of the following is incorrect ?
AUnsuitable for heavy duty starting
BTorque varies as armature current
CTorque-armature current is a straight line
DTorque is zero for zero armature current
157
A NAND gate is called a universal logic element because______________?
Ait is used by everybody
Bany logic function can be realized by NAND gates alone
Call the minization techniques are applicable for optimum NAND gate realization
Dmany digital computers use NAND gates
158
Most of the digital computers do not have floating point hardware because_____________?
Afloating point hardware is costly
Bit is slower than software
Cit is not possible to perform floating point addition by hardware
Dof no specific reason.
159
In the above question (Q38.) , what is the collector voltage ?
A3 V
B8 V
C6 V
D7 V
160
The purpose of resistance in the emitter circuit of a transistor amplifier is to _________________?
ALimit the maximum emitter current
BProvide base-emitter bias
CLimit the change in emitter current
DNone of the above