Related Questions

Overheating of relay contacts or contact born out is due to
A slow making and breaking of load circuit contacts
B foreign matter on the contact surface
C too low contact pressure
D all of the above
Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is
A $$\frac{{\text{Q}}}{2}$$
B $$\frac{{\text{Q}}}{4}$$
C $$\frac{{\text{Q}}}{8}$$
D $$\frac{{\text{Q}}}{{16}}$$
Admittance relay is _______ relay.
A impedance
B directional
C non-directional
D none of the above
The property of a bearing material which has the ability to accommodate shaft deflections and bearing inaccuracies by plastic deformation without excessive wear and heating, is known as
A Bondability
B Embeddability
C Comformability
D Fatigue strength
The voltage appearing across the contacts after opening of the circuit breaker is called______voltage.
A recovery
B surge
C operating
D arc
E none of the above
The contacts of high voltage switches used in power system are submerged in oil. The main purpose of the oil is to
A lubricate the contacts
B insulate the contacts from switch body
C extinguish the arc
D all of the above
E none of the above
What environmental issue involves the excessive use of fertilizers and run-off chemimls into bodies of water. causing oxygen depletion and harm to aquatic ecosystems?
A Acid rani
B Eutrophication
C Desertification
D Deforestation
Today youngsters ___ themselves in ___ to much mobile contacts with their peers?
A engaged making
B engage making
C keeping doing
D busy doing
complete the sentence with suitable versbs : Today's youngsters --------- themselves in ------------ too much mobile contacts with their peers.
A engage, making
B engaged, making
C keeping, doing
The arcing contacts in a circuit breaker are made of
A copper tungsten alloy
B porcelain
C electrolytic copper
D aluminium alloy

Next steps