# Common Mechanical Comprehension Practice Test 3

Question – 1

1. A hoist can be used for _________.

• A. cutting plastic

• B. lifting objects

• C. melting iron bars

• D. making machineries

Question – 2

2. Water can be transferred between two adjacent swimming pools by using a _________.

• A. piston

• B. pulley

• C. siphon

• D. hoist

Question – 3

3. Liquid fuels have ________ solid fuels.

• A. higher calorific value than

• B. lower calorific value than

• C. same calorific value as

• D. no calorific value as

Question – 4

4. __________ can be measured using an aneroid barometer.

• A. Temperature

• B. Atmospheric pressure

• C. Viscosity

• D. Weight

Question – 5

5. Which of the following mechanical devices help in measuring the level of water in a tank?

• A. Switch

• B. Galvanometer

• C. Float

• D. Valve

Question – 6

6. A micrometer is used to measure

• A. microscopic objects

• B. very small but not microscopic objects

• C. large objects

• D. objects of all sizes

Question – 7

7. At normal temperature, the surface tension of water is __________ the surface tension of mercury.

• A. less than

• B. more than

• C. equal to

• D. varies depending on the quantity

Question – 8

8. _________ force is produced when objects are rubbed.

• A. Frictional

• B. Gravitational

• C. Centripetal

• D. Centrifugal

Question – 9

9. Torsion spring coil and uncoil produces a _________.

• A. direct pull

• B. twisting action

• C. magnetic field

• D. none of the above

Question – 10

10. If two gears are of different sizes, they can mesh properly only if their teeth are _______.

• A. of the same size

• B. of different sizes

• C. blunt edges

• D. sharp edges

Question – 11

11. ________ threads can be used in cases where power is transmitted in only one direction.

• A. Square

• B. Angle

• C. Buttress

• D. Acme

Question – 12

12. When a material is heated, its toughness ________.

• A. decreases

• B. increases

• C. remains constant

• D. increases or decreases depending on the thickness of the material

Question – 13

13. In a ________ bearing the length and diameter of the journal are equal.

• A. long

• B. square

• C. triangle

• D. short

Question – 14

14. _________ energy is stored in hydraulic accumulator so that the stored energy can be supplied to a machine when required.

• A. Potential

• B. Kinetic

• C. Kinematic

• D. Pressure

Question – 15

15. In gas turbines, _________ type rotary compressor is used.

• A. centripetal

• B. centrifugal

• C. axial flow