AUTOMOBILE ENGINEERING MCQ SECTION 31

301. Paraffins are generally represented by

(A) C_nH_n

(B) C_nH_2n

(C) C_nH_2n+2

(D) C_nH_2n-6

Answer: -C_nH_2n+2

302.The area of the indicator diagram is measured by

(A) Rotameter

(B) Dynamometer

(C) Planimeter

(D) Viscometer

Answer: -Planimeter

303.Consider the following statements about dryness fraction:

1. It can be decreased with an increase in boiler pressure or a decrease in

condenser pressure.

2. Decreased dryness fraction can erode turbine blades.

3. The turbine efficiency is decreased with low dryness fraction.

4. It is a common practice to maintain at least 90% quality at the turbine

exit. Of these statements:

(A) 1 and 2 are true.

(B) 1, 2 3 and 4 are true.

(C) 1, 2 and 3 are true

(D) 2, 3 and 4 are true.

Answer: -1, 2 3 and 4 are true.

304.Which of the following is not a Boiler Mounting?

(A) Pressure Gauge

(B) Fusible Plug

(C) Feed Pump

(D) Man hole

Answer: -Feed Pump

305.Coefficient of discharge of reciprocating pump in case of negative slip is

(A) More than one

(B) Equal to one

(C) Less than one

(D) Zero

Answer: -More than one

306.The specific volume of water when heated from 0°C

(A) first increases and then decreases.

(B) first decreases and then increases.

(C) increases steadily.

(D) decreases steadily.

Answer: -first decreases and then increases.

307.Which type of welding is very widely used in rail track work?

(A) Laser Beam welding

(B) Friction welding

(C) Electron Beam welding

(D) Thermit welding

Answer: -Thermit welding

308. Paraffins have molecular structure of

(A) chain saturated

(B) chain unsaturated

(C) ring saturated

(D) ring unsaturated

Answer: -chain saturated

309.Lathe bed is made of

(A) Mild steel

(B) Alloy steel

(C) Pig steel

(D) Chilled Cast iron

Answer: -Chilled Cast iron

310.Which of the following is required for Electric Arc welding:

(A) A low Amperage and high voltage combination

(B) A low Amperage and low voltage combination

(C) A high Amperage and low voltage combination

(D) None of these

Answer: -A high Amperage and low voltage combination