Question is ⇒ Aluminium has a specific gravity of, Options are ⇒ (A) 1.5, (B) 2.7, (C) 4.2, (D) 7.8, (E) , Leave your comments or Download question paper.

Question is ⇒ Aluminium has a specific gravity of, Options are ⇒ (A) 1.5, (B) 2.7, (C) 4.2, (D) 7.8, (E) , Leave your comments or Download question paper. Previous question Next question


Q1.	Aluminium has a specific gravity of
A.	1.5 [Wrong Answer]
B.	2.7 [Correct Answer]
C.	4.2 [Wrong Answer]
D.	7.8 [Wrong Answer]
View Answer 18 -7 Explanation:- Answer : B Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ The effect of ice on transmission line conductors is to increase the
transmission losses
weight of the conductor
tendency for corona
resistance to flow of current

⇒ Which of the following distribution systems is more reliable ?
Radial system
Tree system
Ring main system
All are equally reliable

⇒ On which of the following factors skin effect depends ?
Frequency of the current
Size of the conductor
Resistivity of the conductor material
All of the above

⇒ If variable part of a.nnual cost on account of interest and depreciation on the capital outlay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be most economical. This statement is known as
Kelvin's law
Ohm's law
Kirchhoffs law
Faraday's law

⇒ High voltage is primarily used, for long distance power transmission, to
reduce the time of transmission
reduce the transmission losses
make the system reliable
none of the above

⇒ A booster is a
series wound generator
shunt wound generator
synchronous generator
none of the above

⇒ A gay wire
protects conductors against shortcircuiting
provides emergency earth route
provides protection against surges
supports the pole

⇒ The colour of the neutral of three-core flexible cable is
blue
brown
red
black

⇒ The material used for the manufacture of grounding wires is
cast iron
aluminium
stainless steel
galvanised steel

⇒ Which of the following is usually not the generating voltage ?
6.6 kV
8.8 kV
11 kV
13.2 kV

⇒ The loads on distributors systems are generally
balanced
unbalanced
either of the above
none of the above

⇒ A synchronous condenser is generally installed at the of the ____ transmission line
receiving end
sending end
middle
none of the above

⇒ The steel used in steel cored conductors is usually
alloy steel
stainless steel
mild steel
high speed steel

⇒ In a substation the following equipment is not installed
exciters
series capacitors
shunt reactors
voltage transformers

⇒ When a conductor carries more current on the surface as compared to core, it is due to
permeability variation
corona
skin effect
unsymmetrical fault

⇒ Steepness of the travelling waves is alternated by ____ of the line
capacitance
inductance
resistance
all of the above

⇒ Solid grounding is adopted for voltages below
100 V
200 V
400 V
660 V

⇒ A uniformly-loaded D.C. distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is
one-fourth
one-third
one-half
twice

⇒ In aluminium conductors, steel core is provided to
compensate for skin effect
neutralise proximity effect
reduce line inductance
increase the tensile strength

⇒ Which of the following are the constants of the transmission lines ?
Resistance
Inductance
Capacitance
All of the above

⇒ The operating voltage of extra high tension cables is upto
66 kV
11 kV
33 kV
66 kV

⇒ Which of the following is neglected in the analysis of short transmission lines ?
Series impedance
Shunt admittance
I²R loss
None of the above

⇒ A tap changing transformer is used to
supply low voltage current for instruments
step up the voltage
step down the voltage
step up as well as step down the voltage

⇒ If the voltage is increased x times, the size of the conductor would be
reduced to 1/x² times
reduced to 1/x times
increased x times
increased to x² times

⇒ Which of the following cause transient disturbances ?
Faults
Load variations
Switching operations
Any of the above

⇒ The corona is considerably affected by which of the following ?
Size of the conductor
Shape of the conductor
Surface condition of the conductor
All of the above

⇒ The voltage of the single phase supply to residential consumers is
110 V
210 V
230 V
400 V

⇒ Which of the following equipment, for regulating the voltage in distribution feeder, will be most economical ?
Static condenser
Synchronous condenser
Tap changing transforraer
Booster transformer

⇒ The use of strain type insulators is made where the conductors are
dead ended
at intermediate anchor towers
any of the above
none of the above

⇒ By using bundle conductors, the critical voltage for the formation of corona will
remain same
decrease
increase
not occur