Curd contains mainly______acid.
(A) Benzoic
(B) Fumaric
(C) Lactic
(D) Malic
Which of the following acids is used in car batteries?
(A) Nitric acid
(B) Hydrochloric acid
(C) Sulphuric acid
(D) Hydrofloric acid
sulphuric acid is used in car batteries.
Tungsten resistance to temperature rise?
(A) decreases
(B) increases
(C) there is no change
(D) All these
At high temperatures, the tungsten filament gets hot and atoms in the filament vibrate more. The electrons in the current now collide more with the atoms & more energy is needed to push the current through the filament. Hence, the resistance of tungsten increases with temperature.
Are fan boxes installed in roofs?
(A) Casing-keeping wiring
(B) in cleat wiring
(C) in conduit wiring
(D) Wiring
Most building codes require ceiling fans to be mounted on special fan-rated boxes made of metal or strong plastic with deep-threaded holes for the mounting screws. The box must be mounted firmly by attaching it directly to a framing member or using a fan-rated brace.
Solder wire is made?
(A) Land and tin
(B) Zinc and copper
(C) copper and lead
(D) None of these
Capacitors are fitted to increase the power coefficient.
(A) parallel to the supply
(B) By putting resistance to supply
(C) In the supply chain
(D) None of these
In an AC circuit, magnetic reversal due to phase difference between current and voltage occurs 50 or 60 times per second. A capacitor helps to improve the power factor by relieving the supply line of the reactive power.
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