Related Questions

Refractory period in the ventricles
A Decreases during sympathetic stimulation of the heart
B Corresponds to the period of ventricular contraction
C Corresponds to the QRS complex of ECG
D Corresponds to the period of ventricular action potential
E Is shorter than the skeletal muscle
Absolute refractory period in the ventricles
A Corresponds to the period of ventricular depolarization.
B Corresponds to the period of ventricular contraction.
C Is the period when the ventricles are completely unexcitable.
D Is shorter than the corresponding atrial muscle.
E Decrease during stimulation of the vagus nerve to the heart.
Dry mix hydraulic compositions of refractory aggregates with suitable bonding materials are called refractory
A Mortars
B Cements
C Castables
D None of these
If a refractory contains high content of silicon, it means refractory is
A Acidic
B Basic
C Neutral
D Brittle
An insulating refractory brick should have high porosity and low thermal conductivity. Which of the following is not used for inducing porosity in the insulating refractory bricks during its manufacture?
A Cork
B Saw dust
C Sand
D Chemically prepared foam
Four subjects ---physics, Chemistry, Mathematics and Biology ---were taught in four consecutive periods of one hour each starting from 8.00 a.m. At what time was the chemistry period scheduled? 1. Mathematics period ended at 10.00 a.m, which was preceded by Biology. 2. Physics was scheduled in the last period. 3. Mathematics period was immediately followed by Chemistry.
A Only 1
B Only 2
C Only 2 and 3
D Only 1 and either 2 or 3
Antonym of 'Refractory' is:
A Stubborn
B Obedient
C Intractable
D Cussed
Fusion point of an acidic refractory material is
A Increased by the addition of basic oxides
B Reduced by the addition of basic oxides
C Not affected by the addition of basic oxides
D Not affected by the addition of basic oxides
Which of the following is not a high alumina refractory material?
A Kyanite
B Sillimanite
C Diaspore
D Periclase
Which of the following will happen if the thickness of refractory wall of furnace is increased?
A Heat loss through furnace wall will increase
B Temperature inside the furnace will fall
C Temperature on the outer surface of furnace walls will drop
D Energy consumption will increase

Next steps