1371. The number of beats per minute by a normal heart of human adult is ________.
A. 72 *
1372. Human eye is sensitive to _______.
A. Green light
B. Yellow light
C. Red light
D. Blue light *
1373. “Lactometer” is a device used to test the _______.
A. Purity of water
B. Purity of honey
C. Purity of milk *
D. Purity of Air
1374. The green colour of water in a lake is due to _______.
A. Excessive growth of sea weeds
B. Algae *
1375. The lightning conductor or rod used for protecting buildings from lightning is made of _______.
B. Copper *
D. All of these
1376. The rod in the dry cell, which acts as the positive terminal , is made of __________.
A. Carbon *
1377. Identify” Software” in computer technology ______.
A. Physical equipment
B. Collection of programmes *
C. Graphical representation
1378. Who invented the saftey pin?
A. Charles goodyear
B. Stwart Harshone
C. Walter Hunt *
D. A. Rose
1379. Who coined the phrase “Survival of the fittest”?
A. Charles Darwin
B. Herbert spencer *
C. Alfred Wallace
D. A. Rose
1380. Which of the following transformations of energy takes place in a microphone?
A. Electrical Energy into sound
B. Sound into electrical energy *
C. Mechanical energy into sound
D. Sound into mechanical energy