# ASVAB Mechanical Comprehension Practice Test 4

Question – 1

1. At high altitudes ______ power is required by a compressor.

• A. no

• B. high

• C. less

• D. varying

Question – 2

2. ________ bodies rebound after impact.

• A. Inelastic

• B. Elastic

• C. Plastic

• D. Steel

Question – 3

3. If a car moves with a constant speed around a circular track, then the acceleration will be ________.

• A. towards the center of the circle

• B. away from the center of the circle

• C. towards the direction of motion

• D. changing with respect to time

Question – 4

4. Hardness of steel can be increased by adding ______.

• A. sulphur

• B. nickel

• C. chromium

• D. phosphorous

Question – 5

5. In a cyclic process which is not reversible, the entropy _________.

• A. increases

• B. decreases

• C. remains constant

• D. changes depending on the atmosphere

Question – 6

6. The speed of a car increases when it rolls down the hill. This is because,

• A. its kinetic energy gets converted into potential energy

• B. its potential energy gets converted into kinetic energy

• C. its potential energy remains constant

• D. the wheels of the car are idle

Question – 7

7. The kinetic energy of a moving object can be calculated using the formula

• A. 1/2 mv2

• B. 1/2 m2v

• C. mv

• D. mv2

Question – 8

8. The temperature and volume of a gas ________ when it is heated at constant pressure.

• A. decrease

• B. increase

• C. become zero

• D. neither increase nor decrease

Question – 9

9. In a refrigerator, when frost is formed on cooling coils __________.

• A. more power is consumed

• B. less power is consumed

• C. more heat is transferred

• D. no power is consumed

Question – 10

i. Stresses can be relievedii. Materials can be softenediii. Steel can be hardenediv. Characteristics of a machine can be improved

• A. i,ii,iii

• B. i,ii,iii,iv

• C. i,ii,iv

• D. i,iii,iv

Question – 11

11. The molecules in a fluid are attracted due to which among the following properties?

• A. viscosity

• B. surface tension

• C. cohesion

Question – 12

12. The potential energy of an object can be calculated using the formula _______.

• A. PE=mgh

• B. PE=mg

• C. PE=mg2

• D. PE=mgh2

Question – 13

13. When temperature is increased, the thermal conductivity of water ______.

• A. increases

• B. decreases

• C. remains constant

• D. increases or decreases depending upon temperature

Question – 14

14. A ________ tool is used on broaching machines and milling machines.

• A. three-point cutting

• B. multi-point cutting

• C. two-point cutting

• D. one-point cutting

Question – 15

15. A _________ is a fixed position layout.

• A. static product layout

• B. synthetic layout

• C. process layout

• D. combination layout